(commons-imaging) branch master updated: Use JUnit 5 convention for class visibility

[ggregory]

This is an automated email from the ASF dual-hosted git repository.

ggregory pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-imaging.git


The following commit(s) were added to refs/heads/master by this push:
     new bac7a3bb Use JUnit 5 convention for class visibility
bac7a3bb is described below

commit bac7a3bb9b4b40dd8a347453da21f6344b560597
Author: Gary D. Gregory <garydgreg...@gmail.com>
AuthorDate: Sun Jun 8 14:47:18 2025 -0400

    Use JUnit 5 convention for class visibility
---
 src/test/java/org/apache/commons/imaging/ImageDumpTest.java             | 2 +-
 src/test/java/org/apache/commons/imaging/ImageFormatsTest.java          | 2 +-
 src/test/java/org/apache/commons/imaging/ImageInfoTest.java             | 2 +-
 src/test/java/org/apache/commons/imaging/ImageReadExceptionTest.java    | 2 +-
 src/test/java/org/apache/commons/imaging/ImageWriteExceptionTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/ImagingGuessFormatTest.java    | 2 +-
 .../java/org/apache/commons/imaging/bytesource/ByteSourceDataTest.java  | 2 +-
 .../java/org/apache/commons/imaging/bytesource/ByteSourceImageTest.java | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorCieLabTest.java     | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorCieLchTest.java     | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorCieLuvTest.java     | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorCmyTest.java        | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorCmykTest.java       | 2 +-
 .../java/org/apache/commons/imaging/color/ColorConversionsTest.java     | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorHslTest.java        | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorHsvTest.java        | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorHunterLabTest.java  | 2 +-
 src/test/java/org/apache/commons/imaging/color/ColorXyzTest.java        | 2 +-
 .../java/org/apache/commons/imaging/common/BinaryFileFunctionsTest.java | 2 +-
 src/test/java/org/apache/commons/imaging/common/ImageBuilderTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/common/RationalNumberTest.java | 2 +-
 .../org/apache/commons/imaging/common/RgbBufferedImageFactoryTest.java  | 2 +-
 .../commons/imaging/examples/ApacheImagingSpeedAndMemoryTest.java       | 2 +-
 .../java/org/apache/commons/imaging/formats/bmp/BmpImageParserTest.java | 2 +-
 src/test/java/org/apache/commons/imaging/formats/bmp/BmpReadTest.java   | 2 +-
 .../java/org/apache/commons/imaging/formats/bmp/BmpRoundtripTest.java   | 2 +-
 .../java/org/apache/commons/imaging/formats/bmp/BmpWriterRgbTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/dcx/DcxReadTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/gif/GifReadTest.java   | 2 +-
 .../org/apache/commons/imaging/formats/icns/IcnsImageParserTest.java    | 2 +-
 src/test/java/org/apache/commons/imaging/formats/icns/IcnsReadTest.java | 2 +-
 .../java/org/apache/commons/imaging/formats/icns/IcnsRoundTripTest.java | 2 +-
 .../java/org/apache/commons/imaging/formats/ico/IcoImageParserTest.java | 2 +-
 src/test/java/org/apache/commons/imaging/formats/ico/IcoReadTest.java   | 2 +-
 .../java/org/apache/commons/imaging/formats/ico/IcoRoundtripTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/jpeg/JpegReadTest.java | 2 +-
 .../commons/imaging/formats/jpeg/JpegWithInvalidDhtSegmentTest.java     | 2 +-
 .../apache/commons/imaging/formats/jpeg/JpegWithJpegThumbnailTest.java  | 2 +-
 .../java/org/apache/commons/imaging/formats/jpeg/decoder/DctTest.java   | 2 +-
 .../apache/commons/imaging/formats/jpeg/decoder/JpegDecoderTest.java    | 2 +-
 .../commons/imaging/formats/jpeg/decoder/JpegInputStreamTest.java       | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/exif/AsciiFieldTest.java    | 2 +-
 .../java/org/apache/commons/imaging/formats/jpeg/exif/ExifDumpTest.java | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/exif/ExifRewriteTest.java   | 2 +-
 .../commons/imaging/formats/jpeg/exif/ExifRewriterRoundtripTest.java    | 2 +-
 src/test/java/org/apache/commons/imaging/formats/jpeg/exif/GpsTest.java | 2 +-
 .../apache/commons/imaging/formats/jpeg/exif/MakerNoteFieldTest.java    | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/exif/MicrosoftTagTest.java  | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/exif/TextFieldTest.java     | 2 +-
 .../commons/imaging/formats/jpeg/exif/WriteExifMetadataExampleTest.java | 2 +-
 .../java/org/apache/commons/imaging/formats/jpeg/iptc/IptcAddTest.java  | 2 +-
 .../java/org/apache/commons/imaging/formats/jpeg/iptc/IptcDumpTest.java | 2 +-
 .../apache/commons/imaging/formats/jpeg/iptc/IptcFullDiscardTest.java   | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/iptc/IptcParserTest.java    | 2 +-
 .../apache/commons/imaging/formats/jpeg/iptc/IptcTypeLookupTest.java    | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/iptc/IptcUpdateTest.java    | 2 +-
 .../apache/commons/imaging/formats/jpeg/segments/App2SegmentTest.java   | 2 +-
 .../apache/commons/imaging/formats/jpeg/segments/AppnSegmentTest.java   | 2 +-
 .../apache/commons/imaging/formats/jpeg/segments/JfifSegmentTest.java   | 2 +-
 .../commons/imaging/formats/jpeg/segments/NegSizeSegmentTest.java       | 2 +-
 .../apache/commons/imaging/formats/jpeg/segments/SosSegmentTest.java    | 2 +-
 .../commons/imaging/formats/jpeg/specific/JpegImageParserTest.java      | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpDumpTest.java    | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpParserTest.java  | 2 +-
 .../org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpRewriteTest.java | 2 +-
 src/test/java/org/apache/commons/imaging/formats/pam/PamReadTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/pcx/PcxReadTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/pcx/RleReaderTest.java | 2 +-
 .../org/apache/commons/imaging/formats/png/ConvertPngToGifTest.java     | 2 +-
 .../java/org/apache/commons/imaging/formats/png/PhysicalScaleTest.java  | 2 +-
 src/test/java/org/apache/commons/imaging/formats/png/PngCrcTest.java    | 2 +-
 .../java/org/apache/commons/imaging/formats/png/PngImageParserTest.java | 2 +-
 .../apache/commons/imaging/formats/png/PngMultipleRoundtripTest.java    | 2 +-
 src/test/java/org/apache/commons/imaging/formats/png/PngReadTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/png/PngTextTest.java   | 2 +-
 .../commons/imaging/formats/png/PngWithInvalidPngChunkSizeTest.java     | 2 +-
 .../org/apache/commons/imaging/formats/png/PngWritePredictorTest.java   | 2 +-
 .../java/org/apache/commons/imaging/formats/png/PngWriteReadTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/png/PngWriterTest.java | 2 +-
 .../org/apache/commons/imaging/formats/png/chunks/PngChunkIccpTest.java | 2 +-
 .../org/apache/commons/imaging/formats/png/chunks/PngChunkScalTest.java | 2 +-
 .../org/apache/commons/imaging/formats/png/chunks/PngChunkTextTest.java | 2 +-
 .../imaging/formats/png/scanlinefilters/ScanlineFilterAverageTest.java  | 2 +-
 .../imaging/formats/png/scanlinefilters/ScanlineFilterPaethTest.java    | 2 +-
 .../imaging/formats/png/scanlinefilters/ScanlineFilterUpTest.java       | 2 +-
 .../png/transparencyfilters/TransparencyFilterIndexedColorTest.java     | 2 +-
 .../java/org/apache/commons/imaging/formats/pnm/PbmFileInfoTest.java    | 2 +-
 .../java/org/apache/commons/imaging/formats/pnm/PgmFileInfoTest.java    | 2 +-
 .../java/org/apache/commons/imaging/formats/pnm/PnmImageParserTest.java | 2 +-
 .../java/org/apache/commons/imaging/formats/pnm/PpmFileInfoTest.java    | 2 +-
 .../org/apache/commons/imaging/formats/pnm/WhiteSpaceReaderTest.java    | 2 +-
 .../org/apache/commons/imaging/formats/psd/ImageResourceBlockTest.java  | 2 +-
 .../org/apache/commons/imaging/formats/psd/ImageResourceTypeTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/psd/PsdReadTest.java   | 2 +-
 .../commons/imaging/formats/psd/dataparsers/DataParserCmykTest.java     | 2 +-
 .../imaging/formats/psd/dataparsers/DataParserGrayscaleTest.java        | 2 +-
 .../commons/imaging/formats/psd/dataparsers/DataParserIndexedTest.java  | 2 +-
 .../commons/imaging/formats/psd/dataparsers/DataParserLabTest.java      | 2 +-
 src/test/java/org/apache/commons/imaging/formats/rgbe/RgbeReadTest.java | 2 +-
 .../java/org/apache/commons/imaging/formats/tiff/JpegImageDataTest.java | 2 +-
 .../org/apache/commons/imaging/formats/tiff/TiffAlphaRoundTripTest.java | 2 +-
 .../java/org/apache/commons/imaging/formats/tiff/TiffBigTiffTest.java   | 2 +-
 .../java/org/apache/commons/imaging/formats/tiff/TiffCcittTest.java     | 2 +-
 .../imaging/formats/tiff/TiffFloatingPointMultivariableTest.java        | 2 +-
 .../apache/commons/imaging/formats/tiff/TiffFloatingPointReadTest.java  | 2 +-
 .../commons/imaging/formats/tiff/TiffFloatingPointRoundTripTest.java    | 2 +-
 .../org/apache/commons/imaging/formats/tiff/TiffImageParserTest.java    | 2 +-
 src/test/java/org/apache/commons/imaging/formats/tiff/TiffJpegTest.java | 2 +-
 src/test/java/org/apache/commons/imaging/formats/tiff/TiffLzwTest.java  | 2 +-
 .../org/apache/commons/imaging/formats/tiff/TiffRasterDataIntTest.java  | 2 +-
 .../org/apache/commons/imaging/formats/tiff/TiffRasterDataTest.java     | 2 +-
 .../apache/commons/imaging/formats/tiff/TiffRasterStatisticsTest.java   | 2 +-
 .../java/org/apache/commons/imaging/formats/tiff/TiffReadAlphaTest.java | 2 +-
 .../org/apache/commons/imaging/formats/tiff/TiffReadImageInfoTest.java  | 2 +-
 src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadTest.java | 2 +-
 .../org/apache/commons/imaging/formats/tiff/TiffReadWriteTagsTest.java  | 2 +-
 .../org/apache/commons/imaging/formats/tiff/TiffRoundTripInt32Test.java | 2 +-
 .../java/org/apache/commons/imaging/formats/tiff/TiffRoundtripTest.java | 2 +-
 .../apache/commons/imaging/formats/tiff/TiffShortIntRoundTripTest.java  | 2 +-
 .../java/org/apache/commons/imaging/formats/tiff/TiffSubImageTest.java  | 2 +-
 .../org/apache/commons/imaging/formats/tiff/TiffTagIntegrityTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagsTest.java | 2 +-
 .../commons/imaging/formats/tiff/datareaders/DataReaderStripsTest.java  | 2 +-
 .../commons/imaging/formats/tiff/fieldtypes/FieldTypeAsciiTest.java     | 2 +-
 .../commons/imaging/formats/tiff/fieldtypes/FieldTypeByteTest.java      | 2 +-
 .../commons/imaging/formats/tiff/fieldtypes/FieldTypeLongTest.java      | 2 +-
 .../commons/imaging/formats/tiff/fieldtypes/FieldTypeRationalTest.java  | 2 +-
 .../commons/imaging/formats/tiff/fieldtypes/FieldTypeShortTest.java     | 2 +-
 .../apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeTest.java   | 2 +-
 .../commons/imaging/formats/tiff/itu_t4/HuffmanTreeExceptionTest.java   | 2 +-
 .../apache/commons/imaging/formats/tiff/itu_t4/T4_T6_TablesTest.java    | 2 +-
 .../tiff/photometricinterpreters/PhotometricInterpreterLogLuvTest.java  | 2 +-
 .../tiff/photometricinterpreters/PhotometricInterpreterRgbTest.java     | 2 +-
 .../photometricinterpreters/floatingpoint/PaletteEntryForRangeTest.java | 2 +-
 .../photometricinterpreters/floatingpoint/PaletteEntryForValueTest.java | 2 +-
 .../floatingpoint/PhotometricInterpreterFloatTest.java                  | 2 +-
 .../commons/imaging/formats/tiff/taginfos/TagInfoByteOrShortTest.java   | 2 +-
 .../apache/commons/imaging/formats/tiff/taginfos/TagInfoByteTest.java   | 2 +-
 .../apache/commons/imaging/formats/tiff/taginfos/TagInfoSByteTest.java  | 2 +-
 .../apache/commons/imaging/formats/tiff/taginfos/TagInfoSBytesTest.java | 2 +-
 .../apache/commons/imaging/formats/tiff/taginfos/TagInfoSLongTest.java  | 2 +-
 .../apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortTest.java | 2 +-
 .../commons/imaging/formats/tiff/taginfos/TagInfoSShortsTest.java       | 2 +-
 .../commons/imaging/formats/tiff/taginfos/TagInfoUnknownTest.java       | 2 +-
 .../commons/imaging/formats/tiff/write/TiffOutputDirectoryTest.java     | 2 +-
 .../apache/commons/imaging/formats/tiff/write/TiffOutputSetTest.java    | 2 +-
 src/test/java/org/apache/commons/imaging/formats/wbmp/WbmpReadTest.java | 2 +-
 src/test/java/org/apache/commons/imaging/formats/webp/WebPDumpTest.java | 2 +-
 .../java/org/apache/commons/imaging/formats/webp/WebPMetadataTest.java  | 2 +-
 src/test/java/org/apache/commons/imaging/formats/webp/WebPReadTest.java | 2 +-
 src/test/java/org/apache/commons/imaging/formats/xbm/XbmReadTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/xmp/XmpDumpTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/formats/xpm/XpmReadTest.java   | 2 +-
 src/test/java/org/apache/commons/imaging/palette/DitheringTest.java     | 2 +-
 .../org/apache/commons/imaging/palette/PaletteQuantizationTest.java     | 2 +-
 src/test/java/org/apache/commons/imaging/palette/SimplePaletteTest.java | 2 +-
 .../java/org/apache/commons/imaging/roundtrip/BitmapRoundtripTest.java  | 2 +-
 .../org/apache/commons/imaging/roundtrip/GrayscaleRountripTest.java     | 2 +-
 .../org/apache/commons/imaging/roundtrip/LimitedColorRoundtripTest.java | 2 +-
 .../apache/commons/imaging/roundtrip/NullParametersRoundtripTest.java   | 2 +-
 160 files changed, 160 insertions(+), 160 deletions(-)

diff --git a/src/test/java/org/apache/commons/imaging/ImageDumpTest.java 
b/src/test/java/org/apache/commons/imaging/ImageDumpTest.java
index ba60768e..73242b81 100644
--- a/src/test/java/org/apache/commons/imaging/ImageDumpTest.java
+++ b/src/test/java/org/apache/commons/imaging/ImageDumpTest.java
@@ -24,7 +24,7 @@ import java.io.IOException;
 
 import org.junit.jupiter.api.Test;
 
-public class ImageDumpTest {
+class ImageDumpTest {
 
     @Test
     void testDump() throws IOException {
diff --git a/src/test/java/org/apache/commons/imaging/ImageFormatsTest.java 
b/src/test/java/org/apache/commons/imaging/ImageFormatsTest.java
index 03047e64..f834d62c 100644
--- a/src/test/java/org/apache/commons/imaging/ImageFormatsTest.java
+++ b/src/test/java/org/apache/commons/imaging/ImageFormatsTest.java
@@ -27,7 +27,7 @@ import org.junit.jupiter.params.provider.EnumSource;
 /**
  * Tests {@link ImageFormats}.
  */
-public class ImageFormatsTest {
+class ImageFormatsTest {
 
     @ParameterizedTest
     @EnumSource(ImageFormats.class)
diff --git a/src/test/java/org/apache/commons/imaging/ImageInfoTest.java 
b/src/test/java/org/apache/commons/imaging/ImageInfoTest.java
index f4a4fd9c..f5e74a75 100644
--- a/src/test/java/org/apache/commons/imaging/ImageInfoTest.java
+++ b/src/test/java/org/apache/commons/imaging/ImageInfoTest.java
@@ -26,7 +26,7 @@ import org.apache.commons.imaging.ImageInfo.ColorType;
 import org.apache.commons.imaging.ImageInfo.CompressionAlgorithm;
 import org.junit.jupiter.api.Test;
 
-public class ImageInfoTest {
+class ImageInfoTest {
 
     @Test
     void testColorType() {
diff --git 
a/src/test/java/org/apache/commons/imaging/ImageReadExceptionTest.java 
b/src/test/java/org/apache/commons/imaging/ImageReadExceptionTest.java
index 858bde13..f173d577 100644
--- a/src/test/java/org/apache/commons/imaging/ImageReadExceptionTest.java
+++ b/src/test/java/org/apache/commons/imaging/ImageReadExceptionTest.java
@@ -25,7 +25,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests for {@link ImagingException}.
  */
-public class ImageReadExceptionTest {
+class ImageReadExceptionTest {
 
     @Test
     void testCreateExceptionWithMessage() {
diff --git 
a/src/test/java/org/apache/commons/imaging/ImageWriteExceptionTest.java 
b/src/test/java/org/apache/commons/imaging/ImageWriteExceptionTest.java
index 54cb1094..491422a6 100644
--- a/src/test/java/org/apache/commons/imaging/ImageWriteExceptionTest.java
+++ b/src/test/java/org/apache/commons/imaging/ImageWriteExceptionTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.params.provider.MethodSource;
 /**
  * Tests for {@link ImagingException}.
  */
-public class ImageWriteExceptionTest {
+class ImageWriteExceptionTest {
 
     public static Stream<Object[]> data() {
         final ImagingException exception = new ImagingException((String) null);
diff --git 
a/src/test/java/org/apache/commons/imaging/ImagingGuessFormatTest.java 
b/src/test/java/org/apache/commons/imaging/ImagingGuessFormatTest.java
index 63384c85..289c424e 100644
--- a/src/test/java/org/apache/commons/imaging/ImagingGuessFormatTest.java
+++ b/src/test/java/org/apache/commons/imaging/ImagingGuessFormatTest.java
@@ -27,7 +27,7 @@ import org.apache.commons.io.FilenameUtils;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class ImagingGuessFormatTest extends AbstractImagingTest {
+class ImagingGuessFormatTest extends AbstractImagingTest {
 
     public static final String BMP_IMAGE_FILE = "bmp\\1\\Oregon Scientific 
DS6639 - DSC_0307 - small.bmp";
     public static final String PNG_IMAGE_FILE = "png\\1\\Oregon Scientific 
DS6639 - DSC_0307 - small.png";
diff --git 
a/src/test/java/org/apache/commons/imaging/bytesource/ByteSourceDataTest.java 
b/src/test/java/org/apache/commons/imaging/bytesource/ByteSourceDataTest.java
index 11786fb6..d84d411f 100644
--- 
a/src/test/java/org/apache/commons/imaging/bytesource/ByteSourceDataTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/bytesource/ByteSourceDataTest.java
@@ -35,7 +35,7 @@ import org.apache.commons.io.IOUtils;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class ByteSourceDataTest extends AbstractByteSourceTest {
+class ByteSourceDataTest extends AbstractByteSourceTest {
 
     private interface ByteSourceFactory {
         ByteSource getByteSource(byte[] src) throws IOException;
diff --git 
a/src/test/java/org/apache/commons/imaging/bytesource/ByteSourceImageTest.java 
b/src/test/java/org/apache/commons/imaging/bytesource/ByteSourceImageTest.java
index 9b2647f1..20a33414 100644
--- 
a/src/test/java/org/apache/commons/imaging/bytesource/ByteSourceImageTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/bytesource/ByteSourceImageTest.java
@@ -48,7 +48,7 @@ import org.apache.commons.io.FileUtils;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class ByteSourceImageTest extends AbstractByteSourceTest {
+class ByteSourceImageTest extends AbstractByteSourceTest {
 
     public static Stream<File> data() throws Exception {
         return getTestImages().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/color/ColorCieLabTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorCieLabTest.java
index cd25d4f5..427cd7ca 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorCieLabTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorCieLabTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorCieLabTest {
+class ColorCieLabTest {
 
     private ColorCieLab color;
     private ColorCieLab colorCopy;
diff --git 
a/src/test/java/org/apache/commons/imaging/color/ColorCieLchTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorCieLchTest.java
index 435ea04e..c1371f5a 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorCieLchTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorCieLchTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorCieLchTest {
+class ColorCieLchTest {
 
     private ColorCieLch color;
     private ColorCieLch colorCopy;
diff --git 
a/src/test/java/org/apache/commons/imaging/color/ColorCieLuvTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorCieLuvTest.java
index a4443e36..bc89af0a 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorCieLuvTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorCieLuvTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorCieLuvTest {
+class ColorCieLuvTest {
 
     private ColorCieLuv color;
     private ColorCieLuv colorCopy;
diff --git a/src/test/java/org/apache/commons/imaging/color/ColorCmyTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorCmyTest.java
index 5007e2e4..71f310ae 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorCmyTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorCmyTest.java
@@ -23,7 +23,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorCmyTest {
+class ColorCmyTest {
 
     private ColorCmy color;
     private ColorCmy colorCopy;
diff --git a/src/test/java/org/apache/commons/imaging/color/ColorCmykTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorCmykTest.java
index 87d81bcd..34531f4f 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorCmykTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorCmykTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorCmykTest {
+class ColorCmykTest {
 
     private ColorCmyk color;
     private ColorCmyk colorCopy;
diff --git 
a/src/test/java/org/apache/commons/imaging/color/ColorConversionsTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorConversionsTest.java
index c7155975..e20dad5b 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorConversionsTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorConversionsTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class ColorConversionsTest {
+class ColorConversionsTest {
     private static final int[] SAMPLE_RGBS = { 0xffffffff, 0xff000000, 
0xffff0000, 0xff00ff00, 0xff0000ff, 0xffff00ff, 0xfff0ff00, 0xff00ffff, 
0x00000000,
             0xff7f7f7f, };
 
diff --git a/src/test/java/org/apache/commons/imaging/color/ColorHslTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorHslTest.java
index a7d74590..5a577cda 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorHslTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorHslTest.java
@@ -23,7 +23,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorHslTest {
+class ColorHslTest {
 
     private ColorHsl color;
     private ColorHsl colorCopy;
diff --git a/src/test/java/org/apache/commons/imaging/color/ColorHsvTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorHsvTest.java
index 47ff0e2a..3a8114d6 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorHsvTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorHsvTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorHsvTest {
+class ColorHsvTest {
 
     private ColorHsv color;
     private ColorHsv colorCopy;
diff --git 
a/src/test/java/org/apache/commons/imaging/color/ColorHunterLabTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorHunterLabTest.java
index dfb8889d..d6d7baee 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorHunterLabTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorHunterLabTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorHunterLabTest {
+class ColorHunterLabTest {
 
     private ColorHunterLab color;
     private ColorHunterLab colorCopy;
diff --git a/src/test/java/org/apache/commons/imaging/color/ColorXyzTest.java 
b/src/test/java/org/apache/commons/imaging/color/ColorXyzTest.java
index 550671ef..c30eb1ba 100644
--- a/src/test/java/org/apache/commons/imaging/color/ColorXyzTest.java
+++ b/src/test/java/org/apache/commons/imaging/color/ColorXyzTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ColorXyzTest {
+class ColorXyzTest {
 
     private ColorXyz color;
     private ColorXyz colorCopy;
diff --git 
a/src/test/java/org/apache/commons/imaging/common/BinaryFileFunctionsTest.java 
b/src/test/java/org/apache/commons/imaging/common/BinaryFileFunctionsTest.java
index 80fd5d7f..2801a06d 100644
--- 
a/src/test/java/org/apache/commons/imaging/common/BinaryFileFunctionsTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/common/BinaryFileFunctionsTest.java
@@ -22,7 +22,7 @@ import java.nio.ByteOrder;
 import org.apache.commons.imaging.AbstractImagingTest;
 import org.junit.jupiter.api.Test;
 
-public class BinaryFileFunctionsTest extends AbstractImagingTest {
+class BinaryFileFunctionsTest extends AbstractImagingTest {
 
     private static final long TARGET_LONG = 0x01020304_05060708L;
 
diff --git 
a/src/test/java/org/apache/commons/imaging/common/ImageBuilderTest.java 
b/src/test/java/org/apache/commons/imaging/common/ImageBuilderTest.java
index a7f648ac..64c5e4b4 100644
--- a/src/test/java/org/apache/commons/imaging/common/ImageBuilderTest.java
+++ b/src/test/java/org/apache/commons/imaging/common/ImageBuilderTest.java
@@ -30,7 +30,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Provides unit tests for the ImageBuilder class.
  */
-public class ImageBuilderTest {
+class ImageBuilderTest {
 
     void executeBadBounds(final ImageBuilder imageBuilder, final int x, final 
int y, final int w, final int h) {
         try {
diff --git 
a/src/test/java/org/apache/commons/imaging/common/RationalNumberTest.java 
b/src/test/java/org/apache/commons/imaging/common/RationalNumberTest.java
index 02eb35f5..259eea4e 100644
--- a/src/test/java/org/apache/commons/imaging/common/RationalNumberTest.java
+++ b/src/test/java/org/apache/commons/imaging/common/RationalNumberTest.java
@@ -30,7 +30,7 @@ import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class RationalNumberTest extends AbstractImagingTest {
+class RationalNumberTest extends AbstractImagingTest {
 
     public static Stream<Double> data() {
         return Arrays.asList(0d, //
diff --git 
a/src/test/java/org/apache/commons/imaging/common/RgbBufferedImageFactoryTest.java
 
b/src/test/java/org/apache/commons/imaging/common/RgbBufferedImageFactoryTest.java
index 52f7efb9..b54f7bff 100644
--- 
a/src/test/java/org/apache/commons/imaging/common/RgbBufferedImageFactoryTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/common/RgbBufferedImageFactoryTest.java
@@ -23,7 +23,7 @@ import java.awt.image.DirectColorModel;
 
 import org.junit.jupiter.api.Test;
 
-public class RgbBufferedImageFactoryTest {
+class RgbBufferedImageFactoryTest {
 
     @Test
     void testGetColorBufferedImageThrowsIllegalArgumentException() {
diff --git 
a/src/test/java/org/apache/commons/imaging/examples/ApacheImagingSpeedAndMemoryTest.java
 
b/src/test/java/org/apache/commons/imaging/examples/ApacheImagingSpeedAndMemoryTest.java
index 11e0b532..b31c8108 100644
--- 
a/src/test/java/org/apache/commons/imaging/examples/ApacheImagingSpeedAndMemoryTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/examples/ApacheImagingSpeedAndMemoryTest.java
@@ -166,7 +166,7 @@ import org.apache.commons.lang3.ArrayUtils;
 /**
  * A "test stand" for evaluating the speed an memory use of different Apache 
Imaging operations
  */
-public class ApacheImagingSpeedAndMemoryTest {
+class ApacheImagingSpeedAndMemoryTest {
 
     /**
      * Create an instance of the speed and memory test class and execute a 
test loop for the specified file.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/bmp/BmpImageParserTest.java 
b/src/test/java/org/apache/commons/imaging/formats/bmp/BmpImageParserTest.java
index 44812856..95129738 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/bmp/BmpImageParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/bmp/BmpImageParserTest.java
@@ -30,7 +30,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests for the {@link BmpImageParser}.
  */
-public class BmpImageParserTest {
+class BmpImageParserTest {
 
     /**
      * For https://issues.apache.org/jira/browse/IMAGING-279.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/bmp/BmpReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/bmp/BmpReadTest.java
index e4f7348a..4b8e6203 100644
--- a/src/test/java/org/apache/commons/imaging/formats/bmp/BmpReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/bmp/BmpReadTest.java
@@ -35,7 +35,7 @@ import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class BmpReadTest extends AbstractBmpTest {
+class BmpReadTest extends AbstractBmpTest {
 
     public static Collection<File> data() throws Exception {
         return getBmpImages();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/bmp/BmpRoundtripTest.java 
b/src/test/java/org/apache/commons/imaging/formats/bmp/BmpRoundtripTest.java
index 31035b4c..beecebbd 100644
--- a/src/test/java/org/apache/commons/imaging/formats/bmp/BmpRoundtripTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/bmp/BmpRoundtripTest.java
@@ -30,7 +30,7 @@ import org.apache.commons.imaging.ImagingException;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class BmpRoundtripTest extends AbstractBmpTest {
+class BmpRoundtripTest extends AbstractBmpTest {
 
     private int[][] bufferedImageToImageData(final BufferedImage image) {
         final int width = image.getWidth();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/bmp/BmpWriterRgbTest.java 
b/src/test/java/org/apache/commons/imaging/formats/bmp/BmpWriterRgbTest.java
index a63a34e2..0160c8ab 100644
--- a/src/test/java/org/apache/commons/imaging/formats/bmp/BmpWriterRgbTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/bmp/BmpWriterRgbTest.java
@@ -23,7 +23,7 @@ import java.awt.image.BufferedImage;
 
 import org.junit.jupiter.api.Test;
 
-public class BmpWriterRgbTest {
+class BmpWriterRgbTest {
 
     @Test
     void testGetImageData() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/dcx/DcxReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/dcx/DcxReadTest.java
index 08425fb8..e763adc2 100644
--- a/src/test/java/org/apache/commons/imaging/formats/dcx/DcxReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/dcx/DcxReadTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class DcxReadTest extends AbstractDcxTest {
+class DcxReadTest extends AbstractDcxTest {
 
     public static Stream<File> data() throws Exception {
         return getDcxImages().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/gif/GifReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/gif/GifReadTest.java
index 6779f409..abdf8ac0 100644
--- a/src/test/java/org/apache/commons/imaging/formats/gif/GifReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/gif/GifReadTest.java
@@ -39,7 +39,7 @@ import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class GifReadTest extends AbstractGifTest {
+class GifReadTest extends AbstractGifTest {
 
     public static Stream<File> animatedImageData() throws Exception {
         return getAnimatedGifImages().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/icns/IcnsImageParserTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/icns/IcnsImageParserTest.java
index fdca0d80..b406256c 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/icns/IcnsImageParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/icns/IcnsImageParserTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import org.apache.commons.imaging.common.AllocationRequestException;
 import org.junit.jupiter.api.Test;
 
-public class IcnsImageParserTest {
+class IcnsImageParserTest {
 
     @Test
     void testGetImageSize() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/icns/IcnsReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/icns/IcnsReadTest.java
index 8e5ec910..f1dfc796 100644
--- a/src/test/java/org/apache/commons/imaging/formats/icns/IcnsReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/icns/IcnsReadTest.java
@@ -37,7 +37,7 @@ import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class IcnsReadTest extends AbstractIcnsTest {
+class IcnsReadTest extends AbstractIcnsTest {
 
     public static Stream<File> data() throws Exception {
         return getIcnsImages().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/icns/IcnsRoundTripTest.java 
b/src/test/java/org/apache/commons/imaging/formats/icns/IcnsRoundTripTest.java
index 99f3dbfa..946a52f6 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/icns/IcnsRoundTripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/icns/IcnsRoundTripTest.java
@@ -32,7 +32,7 @@ import 
org.apache.commons.imaging.common.AbstractBinaryOutputStream;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class IcnsRoundTripTest extends AbstractIcnsTest {
+class IcnsRoundTripTest extends AbstractIcnsTest {
     // 16x16 test image
     private static final int[][] IMAGE = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
             { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 
1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0 },
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/ico/IcoImageParserTest.java 
b/src/test/java/org/apache/commons/imaging/formats/ico/IcoImageParserTest.java
index bcd6e2f7..df216f35 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/ico/IcoImageParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/ico/IcoImageParserTest.java
@@ -24,7 +24,7 @@ import org.apache.commons.imaging.ImagingException;
 import org.apache.commons.imaging.test.TestResources;
 import org.junit.jupiter.api.Test;
 
-public class IcoImageParserTest {
+class IcoImageParserTest {
 
     /**
      * For <a 
href="https://issues.apache.org/jira/browse/IMAGING-373";>IMAGING-373</a>.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/ico/IcoReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/ico/IcoReadTest.java
index 041ff2eb..17b86055 100644
--- a/src/test/java/org/apache/commons/imaging/formats/ico/IcoReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/ico/IcoReadTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class IcoReadTest extends AbstractIcoTest {
+class IcoReadTest extends AbstractIcoTest {
 
     public static Stream<File> data() throws Exception {
         return getIcoImages().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/ico/IcoRoundtripTest.java 
b/src/test/java/org/apache/commons/imaging/formats/ico/IcoRoundtripTest.java
index c526d544..57e49052 100644
--- a/src/test/java/org/apache/commons/imaging/formats/ico/IcoRoundtripTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/ico/IcoRoundtripTest.java
@@ -36,7 +36,7 @@ import org.apache.commons.imaging.internal.Debug;
 import org.apache.commons.io.FileUtils;
 import org.junit.jupiter.api.Test;
 
-public class IcoRoundtripTest extends AbstractIcoTest {
+class IcoRoundtripTest extends AbstractIcoTest {
     private interface BitmapGenerator {
         byte[] generateBitmap(int foreground, int background, int paletteSize) 
throws IOException, ImagingException;
     }
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegReadTest.java
index 9677a6c9..774b9085 100644
--- a/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegReadTest.java
@@ -37,7 +37,7 @@ import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class JpegReadTest extends AbstractJpegTest {
+class JpegReadTest extends AbstractJpegTest {
 
     public static Stream<File> data() throws Exception {
         return getJpegImages().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegWithInvalidDhtSegmentTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegWithInvalidDhtSegmentTest.java
index 5216a3fe..5ea921cd 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegWithInvalidDhtSegmentTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegWithInvalidDhtSegmentTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Test that an invalid segment will not cause an 
ArrayIndexOutOfBoundsException when the huffman table is created in a DHT 
segment.
  */
-public class JpegWithInvalidDhtSegmentTest {
+class JpegWithInvalidDhtSegmentTest {
 
     @Test
     void testSingleImage() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegWithJpegThumbnailTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegWithJpegThumbnailTest.java
index a83c7096..3db8e8c2 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegWithJpegThumbnailTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/JpegWithJpegThumbnailTest.java
@@ -27,7 +27,7 @@ import org.apache.commons.imaging.Imaging;
 import org.apache.commons.imaging.common.ImageMetadata;
 import org.junit.jupiter.api.Test;
 
-public class JpegWithJpegThumbnailTest extends AbstractImagingTest {
+class JpegWithJpegThumbnailTest extends AbstractImagingTest {
 
     @Test
     void testSingleImage() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/DctTest.java 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/DctTest.java
index 7af26043..5b67e8a2 100644
--- a/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/DctTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/DctTest.java
@@ -21,7 +21,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.junit.jupiter.api.Test;
 
-public class DctTest {
+class DctTest {
 
     private static double[] REFERENCE_forwardDCT(final float[] vector) {
         final double[] ret = new double[8];
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/JpegDecoderTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/JpegDecoderTest.java
index e2c0939e..c4bd42c4 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/JpegDecoderTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/JpegDecoderTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests for the JpegDecoder.
  */
-public class JpegDecoderTest {
+class JpegDecoderTest {
 
     /**
      * Test that a bad file does not hang or take too long to be processed.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/JpegInputStreamTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/JpegInputStreamTest.java
index 41cb7e1f..2cf2478b 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/JpegInputStreamTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/decoder/JpegInputStreamTest.java
@@ -26,7 +26,7 @@ import org.junit.jupiter.api.Test;
  *
  * @see JpegInputStream
  **/
-public class JpegInputStreamTest {
+class JpegInputStreamTest {
 
     @Test
     void testNextBitThrowsImageReadExceptionOne() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/AsciiFieldTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/AsciiFieldTest.java
index 0a0f35de..d7c71840 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/AsciiFieldTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/AsciiFieldTest.java
@@ -34,7 +34,7 @@ import 
org.apache.commons.imaging.formats.tiff.TiffImageMetadata;
 import org.apache.commons.imaging.formats.tiff.constants.TiffTagConstants;
 import org.junit.jupiter.api.Test;
 
-public class AsciiFieldTest extends AbstractExifTest {
+class AsciiFieldTest extends AbstractExifTest {
 
     @Test
     void testSingleImage() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifDumpTest.java 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifDumpTest.java
index 6d46e92d..0c63ff02 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifDumpTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifDumpTest.java
@@ -31,7 +31,7 @@ import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class ExifDumpTest extends AbstractExifTest {
+class ExifDumpTest extends AbstractExifTest {
 
     public static Stream<File> data() throws Exception {
         return getImagesWithExifData().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifRewriteTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifRewriteTest.java
index 80ebaf67..ed5f0f1b 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifRewriteTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifRewriteTest.java
@@ -49,7 +49,7 @@ import 
org.apache.commons.imaging.formats.tiff.write.TiffOutputSet;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class ExifRewriteTest extends AbstractExifTest {
+class ExifRewriteTest extends AbstractExifTest {
     // public ExifRewriteTest(String name)
     // {
     // super(name);
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifRewriterRoundtripTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifRewriterRoundtripTest.java
index 60ae910d..d2e58fb8 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifRewriterRoundtripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/ExifRewriterRoundtripTest.java
@@ -49,7 +49,7 @@ import org.opentest4j.TestSkippedException;
 /**
  * Reads and write EXIF data, and verify that it's identical, and no data 
corruption occurred.
  */
-public class ExifRewriterRoundtripTest extends AbstractExifTest {
+class ExifRewriterRoundtripTest extends AbstractExifTest {
 
     /**
      * Test data.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/GpsTest.java 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/GpsTest.java
index bef42da2..35958fb6 100644
--- a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/GpsTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/GpsTest.java
@@ -33,7 +33,7 @@ import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class GpsTest extends AbstractExifTest {
+class GpsTest extends AbstractExifTest {
 
     public static Stream<File> data() throws Exception {
         return getImagesWithExifData().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/MakerNoteFieldTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/MakerNoteFieldTest.java
index 8aeceda9..15d2a469 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/MakerNoteFieldTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/MakerNoteFieldTest.java
@@ -25,7 +25,7 @@ import org.apache.commons.imaging.formats.tiff.TiffField;
 import org.apache.commons.imaging.formats.tiff.constants.ExifTagConstants;
 import org.apache.commons.imaging.internal.Debug;
 
-public class MakerNoteFieldTest extends AbstractSpecificExifTagTest {
+class MakerNoteFieldTest extends AbstractSpecificExifTagTest {
 
     @Override
     protected void checkField(final File imageFile, final TiffField field) 
throws IOException, ImagingException, ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/MicrosoftTagTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/MicrosoftTagTest.java
index 71d8f9be..09219076 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/MicrosoftTagTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/MicrosoftTagTest.java
@@ -41,7 +41,7 @@ import 
org.apache.commons.imaging.formats.tiff.write.TiffOutputDirectory;
 import org.apache.commons.imaging.formats.tiff.write.TiffOutputSet;
 import org.junit.jupiter.api.Test;
 
-public class MicrosoftTagTest extends AbstractExifTest {
+class MicrosoftTagTest extends AbstractExifTest {
     private static final String AUTHOR = "author";
     private static final String COMMENT = "comment";
     private static final String SUBJECT = "subject";
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/TextFieldTest.java 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/TextFieldTest.java
index 3bc2d385..60c71298 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/TextFieldTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/TextFieldTest.java
@@ -29,7 +29,7 @@ import 
org.apache.commons.imaging.formats.tiff.constants.GpsTagConstants;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.apache.commons.imaging.internal.Debug;
 
-public class TextFieldTest extends AbstractSpecificExifTagTest {
+class TextFieldTest extends AbstractSpecificExifTagTest {
 
     @Override
     protected void checkField(final File imageFile, final TiffField field) 
throws IOException, ImagingException, ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/WriteExifMetadataExampleTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/WriteExifMetadataExampleTest.java
index 2c2047c8..6a161146 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/WriteExifMetadataExampleTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/exif/WriteExifMetadataExampleTest.java
@@ -33,7 +33,7 @@ import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class WriteExifMetadataExampleTest extends AbstractExifTest {
+class WriteExifMetadataExampleTest extends AbstractExifTest {
 
     public static Stream<File> data() throws Exception {
         return getJpegImages().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcAddTest.java 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcAddTest.java
index f8baca21..ef8057ae 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcAddTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcAddTest.java
@@ -33,7 +33,7 @@ import 
org.apache.commons.imaging.formats.jpeg.JpegPhotoshopMetadata;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class IptcAddTest extends AbstractIptcTest {
+class IptcAddTest extends AbstractIptcTest {
 
     public static Stream<File> data() throws Exception {
         return getJpegImages().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcDumpTest.java 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcDumpTest.java
index 9d4a8379..3fd155e1 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcDumpTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcDumpTest.java
@@ -30,7 +30,7 @@ import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class IptcDumpTest extends AbstractIptcTest {
+class IptcDumpTest extends AbstractIptcTest {
 
     public static Stream<File> data() throws Exception {
         return getImagesWithIptcData().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcFullDiscardTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcFullDiscardTest.java
index 59a81c6a..66c02dad 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcFullDiscardTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcFullDiscardTest.java
@@ -28,7 +28,7 @@ import javax.imageio.ImageIO;
 
 import org.junit.jupiter.api.Test;
 
-public class IptcFullDiscardTest {
+class IptcFullDiscardTest {
 
     private byte[] addMetaData(final byte[] bytes) throws Exception {
         final IptcRecord record = new IptcRecord(IptcTypes.KEYWORDS, "meta; 
data");
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcParserTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcParserTest.java
index ad7fcaa9..34bd0922 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcParserTest.java
@@ -46,7 +46,7 @@ import org.junit.jupiter.params.provider.CsvSource;
 /**
  * Tests for the {#link {@link IptcParser} class.
  */
-public class IptcParserTest {
+class IptcParserTest {
 
     /**
      * Tests the correct encoding when writing IptcRecords with method {@link 
IptcParser#writeIptcBlock(List, boolean)}.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcTypeLookupTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcTypeLookupTest.java
index 3ef311fc..d2d89369 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcTypeLookupTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcTypeLookupTest.java
@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.junit.jupiter.api.Test;
 
-public class IptcTypeLookupTest {
+class IptcTypeLookupTest {
 
     @Test
     void testGetIptcTypeWithPositive() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcUpdateTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcUpdateTest.java
index 29a76371..041286ef 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcUpdateTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/iptc/IptcUpdateTest.java
@@ -36,7 +36,7 @@ import 
org.apache.commons.imaging.formats.jpeg.JpegPhotoshopMetadata;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class IptcUpdateTest extends AbstractIptcTest {
+class IptcUpdateTest extends AbstractIptcTest {
 
     public static Stream<File> data() throws Exception {
         return getImagesWithIptcData().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/App2SegmentTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/App2SegmentTest.java
index 4c1996e4..7a82e21d 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/App2SegmentTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/App2SegmentTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.api.Test;
  *
  * @see App2Segment
  **/
-public class App2SegmentTest {
+class App2SegmentTest {
 
     @Test
     void testCompareTo() throws IOException, ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/AppnSegmentTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/AppnSegmentTest.java
index 5d24f1ba..6f4de84c 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/AppnSegmentTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/AppnSegmentTest.java
@@ -25,7 +25,7 @@ import java.io.InputStream;
 import org.apache.commons.imaging.ImagingConstants;
 import org.junit.jupiter.api.Test;
 
-public class AppnSegmentTest {
+class AppnSegmentTest {
 
     @Test
     void testCreatesAppnSegment() throws IOException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/JfifSegmentTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/JfifSegmentTest.java
index be30c537..21f767b0 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/JfifSegmentTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/JfifSegmentTest.java
@@ -24,7 +24,7 @@ import java.io.IOException;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class JfifSegmentTest {
+class JfifSegmentTest {
 
     @Test
     void testCreatesJfifSegment() throws IOException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/NegSizeSegmentTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/NegSizeSegmentTest.java
index 09d267ba..fce03d8e 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/NegSizeSegmentTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/NegSizeSegmentTest.java
@@ -30,7 +30,7 @@ import 
org.apache.commons.imaging.formats.jpeg.JpegImagingParameters;
 import org.apache.commons.imaging.formats.jpeg.JpegUtils;
 import org.junit.jupiter.api.Test;
 
-public class NegSizeSegmentTest {
+class NegSizeSegmentTest {
 
     @Test
     void testCreatesNegSizeSegment() throws IOException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/SosSegmentTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/SosSegmentTest.java
index 8cb224ca..2cb9ad1e 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/SosSegmentTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/segments/SosSegmentTest.java
@@ -22,7 +22,7 @@ import java.io.IOException;
 
 import org.junit.jupiter.api.Test;
 
-public class SosSegmentTest {
+class SosSegmentTest {
 
     @Test
     void testCreatesSosSegmentTakingThreeArguments() throws IOException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/specific/JpegImageParserTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/specific/JpegImageParserTest.java
index 0d179e9f..a6e3ce81 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/specific/JpegImageParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/specific/JpegImageParserTest.java
@@ -31,7 +31,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Basic tests for JpegImageParser.
  */
-public class JpegImageParserTest {
+class JpegImageParserTest {
     /**
      * Image created with The Gimp 2.8
      *
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpDumpTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpDumpTest.java
index e256144f..dfd7e410 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpDumpTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpDumpTest.java
@@ -28,7 +28,7 @@ import 
org.apache.commons.imaging.formats.jpeg.JpegImagingParameters;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class JpegXmpDumpTest extends AbstractJpegXmpTest {
+class JpegXmpDumpTest extends AbstractJpegXmpTest {
 
     public static Stream<File> data() throws Exception {
         return getImagesWithXmpData().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpParserTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpParserTest.java
index c89565c3..c6028030 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpParserTest.java
@@ -21,7 +21,7 @@ import static org.junit.jupiter.api.Assertions.fail;
 
 import org.junit.jupiter.api.Test;
 
-public class JpegXmpParserTest {
+class JpegXmpParserTest {
 
     @Test
     void testCreatesJpegXmpParserAndCallsParseXmpJpegSegment() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpRewriteTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpRewriteTest.java
index 5d892340..0c6d3eb0 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpRewriteTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/jpeg/xmp/JpegXmpRewriteTest.java
@@ -31,7 +31,7 @@ import 
org.apache.commons.imaging.formats.jpeg.JpegImagingParameters;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class JpegXmpRewriteTest extends AbstractJpegXmpTest {
+class JpegXmpRewriteTest extends AbstractJpegXmpTest {
 
     public static Stream<File> data() throws Exception {
         return getImagesWithXmpData().stream();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/pam/PamReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/pam/PamReadTest.java
index 765b5448..f9cd91c5 100644
--- a/src/test/java/org/apache/commons/imaging/formats/pam/PamReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/pam/PamReadTest.java
@@ -30,7 +30,7 @@ import org.apache.commons.imaging.common.ImageMetadata;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class PamReadTest extends AbstractPamTest {
+class PamReadTest extends AbstractPamTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/pcx/PcxReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/pcx/PcxReadTest.java
index 4cef274f..baa61650 100644
--- a/src/test/java/org/apache/commons/imaging/formats/pcx/PcxReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/pcx/PcxReadTest.java
@@ -30,7 +30,7 @@ import org.apache.commons.imaging.common.ImageMetadata;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class PcxReadTest extends AbstractPcxTest {
+class PcxReadTest extends AbstractPcxTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/pcx/RleReaderTest.java 
b/src/test/java/org/apache/commons/imaging/formats/pcx/RleReaderTest.java
index ac4daef2..88f597f9 100644
--- a/src/test/java/org/apache/commons/imaging/formats/pcx/RleReaderTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/pcx/RleReaderTest.java
@@ -23,7 +23,7 @@ import java.io.ByteArrayInputStream;
 
 import org.junit.jupiter.api.Test;
 
-public class RleReaderTest {
+class RleReaderTest {
 
     @Test
     void testReadWithNonNull() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/ConvertPngToGifTest.java 
b/src/test/java/org/apache/commons/imaging/formats/png/ConvertPngToGifTest.java
index a62e8468..26829875 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/ConvertPngToGifTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/ConvertPngToGifTest.java
@@ -29,7 +29,7 @@ import org.apache.commons.imaging.Imaging;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class ConvertPngToGifTest extends AbstractPngTest {
+class ConvertPngToGifTest extends AbstractPngTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PhysicalScaleTest.java 
b/src/test/java/org/apache/commons/imaging/formats/png/PhysicalScaleTest.java
index 7270da1c..eac47bc4 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/PhysicalScaleTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/PhysicalScaleTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.jupiter.api.Test;
 
-public class PhysicalScaleTest {
+class PhysicalScaleTest {
     private static final double delta = 0.01;
 
     @Test
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngCrcTest.java 
b/src/test/java/org/apache/commons/imaging/formats/png/PngCrcTest.java
index b0bc3ed6..74183fd4 100644
--- a/src/test/java/org/apache/commons/imaging/formats/png/PngCrcTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/png/PngCrcTest.java
@@ -27,7 +27,7 @@ import org.junit.jupiter.api.Test;
  * @see PngCrc
  *
  **/
-public class PngCrcTest {
+class PngCrcTest {
 
     @Test
     void testCrc() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngImageParserTest.java 
b/src/test/java/org/apache/commons/imaging/formats/png/PngImageParserTest.java
index 637d62e8..7d3d3d87 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/PngImageParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/PngImageParserTest.java
@@ -29,7 +29,7 @@ import org.apache.commons.imaging.ImageInfo;
 import org.apache.commons.imaging.common.AllocationRequestException;
 import org.junit.jupiter.api.Test;
 
-public class PngImageParserTest extends AbstractPngTest {
+class PngImageParserTest extends AbstractPngTest {
 
     private static byte[] getPngImageBytes(final BufferedImage image, final 
PngImagingParameters params) throws IOException {
         try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngMultipleRoundtripTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/PngMultipleRoundtripTest.java
index 8104c75c..1aa98927 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/PngMultipleRoundtripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/PngMultipleRoundtripTest.java
@@ -31,7 +31,7 @@ import org.apache.commons.imaging.internal.Debug;
 import org.apache.commons.io.FilenameUtils;
 import org.junit.jupiter.api.Test;
 
-public class PngMultipleRoundtripTest extends AbstractPngTest {
+class PngMultipleRoundtripTest extends AbstractPngTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/png/PngReadTest.java
index cf30ea46..fc36f8af 100644
--- a/src/test/java/org/apache/commons/imaging/formats/png/PngReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/png/PngReadTest.java
@@ -41,7 +41,7 @@ import org.apache.commons.imaging.internal.Debug;
 import org.apache.commons.imaging.test.TestResources;
 import org.junit.jupiter.api.Test;
 
-public class PngReadTest extends AbstractPngTest {
+class PngReadTest extends AbstractPngTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngTextTest.java 
b/src/test/java/org/apache/commons/imaging/formats/png/PngTextTest.java
index af17dddb..db6fe1ef 100644
--- a/src/test/java/org/apache/commons/imaging/formats/png/PngTextTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/png/PngTextTest.java
@@ -30,7 +30,7 @@ import java.util.List;
 import org.apache.commons.imaging.Imaging;
 import org.junit.jupiter.api.Test;
 
-public class PngTextTest extends AbstractPngTest {
+class PngTextTest extends AbstractPngTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngWithInvalidPngChunkSizeTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/PngWithInvalidPngChunkSizeTest.java
index 3ef22e55..a68a20a5 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/PngWithInvalidPngChunkSizeTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/PngWithInvalidPngChunkSizeTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests for PNG files with invalid chunk sizes.
  */
-public class PngWithInvalidPngChunkSizeTest {
+class PngWithInvalidPngChunkSizeTest {
 
     /**
      * Test that an image with an invalid negative PNG chunk size causes an 
ImageReadException instead of other exception types.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngWritePredictorTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/PngWritePredictorTest.java
index ef1a80ae..8c1d6592 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/PngWritePredictorTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/PngWritePredictorTest.java
@@ -33,7 +33,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Provides a test for the PngWriter using predictors
  */
-public class PngWritePredictorTest {
+class PngWritePredictorTest {
 
     @BeforeAll
     public static void setUpClass() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngWriteReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/png/PngWriteReadTest.java
index 3d765e00..817a35a1 100644
--- a/src/test/java/org/apache/commons/imaging/formats/png/PngWriteReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/png/PngWriteReadTest.java
@@ -37,7 +37,7 @@ import org.apache.commons.imaging.common.GenericImageMetadata;
 import org.apache.commons.imaging.common.ImageMetadata;
 import org.junit.jupiter.api.Test;
 
-public class PngWriteReadTest extends AbstractImagingTest {
+class PngWriteReadTest extends AbstractImagingTest {
 
     private int[][] bufferedImageToImageData(final BufferedImage image) {
         final int width = image.getWidth();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/PngWriterTest.java 
b/src/test/java/org/apache/commons/imaging/formats/png/PngWriterTest.java
index 67bf6ea2..fe1ebed9 100644
--- a/src/test/java/org/apache/commons/imaging/formats/png/PngWriterTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/png/PngWriterTest.java
@@ -34,7 +34,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests for class {@link PngWriter}.
  */
-public class PngWriterTest extends AbstractPngTest {
+class PngWriterTest extends AbstractPngTest {
 
     // The form of the test set is
     // 0. target file name
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkIccpTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkIccpTest.java
index 9528bb57..32e18760 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkIccpTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkIccpTest.java
@@ -35,7 +35,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests for {@link PngChunkIccp}.
  */
-public class PngChunkIccpTest {
+class PngChunkIccpTest {
 
     private static final int chunkType = 1766015824;
 
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkScalTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkScalTest.java
index eb1d584c..35efdc1c 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkScalTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkScalTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class PngChunkScalTest {
+class PngChunkScalTest {
     private static final double delta = 0.001;
     private static final int chunkType = 1933787468;
 
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkTextTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkTextTest.java
index 145c96a1..591e4f95 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkTextTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/chunks/PngChunkTextTest.java
@@ -23,7 +23,7 @@ import org.apache.commons.imaging.ImagingConstants;
 import org.apache.commons.imaging.common.BinaryFunctions;
 import org.junit.jupiter.api.Test;
 
-public class PngChunkTextTest {
+class PngChunkTextTest {
 
     @Test
     void testCreatesPngChunkText() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterAverageTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterAverageTest.java
index 55accdf7..4a040f1f 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterAverageTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterAverageTest.java
@@ -23,7 +23,7 @@ import java.io.IOException;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class ScanlineFilterAverageTest {
+class ScanlineFilterAverageTest {
 
     @Test
     void testUnfilterWithNull() throws IOException, ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterPaethTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterPaethTest.java
index ae210d9d..10f3060c 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterPaethTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterPaethTest.java
@@ -23,7 +23,7 @@ import java.io.IOException;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class ScanlineFilterPaethTest {
+class ScanlineFilterPaethTest {
 
     @Test
     void testUnfilter() throws IOException, ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterUpTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterUpTest.java
index ca494fae..0e46d6ae 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterUpTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/scanlinefilters/ScanlineFilterUpTest.java
@@ -23,7 +23,7 @@ import java.io.IOException;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class ScanlineFilterUpTest {
+class ScanlineFilterUpTest {
 
     @Test
     void testUnfilterWithNull() throws IOException, ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/png/transparencyfilters/TransparencyFilterIndexedColorTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/png/transparencyfilters/TransparencyFilterIndexedColorTest.java
index 6aa2f7c7..64f03cfe 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/png/transparencyfilters/TransparencyFilterIndexedColorTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/png/transparencyfilters/TransparencyFilterIndexedColorTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.fail;
 import org.apache.commons.imaging.ImagingConstants;
 import org.junit.jupiter.api.Test;
 
-public class TransparencyFilterIndexedColorTest {
+class TransparencyFilterIndexedColorTest {
 
     @Test
     void testFilterWithNegativeAndNegative() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/pnm/PbmFileInfoTest.java 
b/src/test/java/org/apache/commons/imaging/formats/pnm/PbmFileInfoTest.java
index 04664b19..4910ca30 100644
--- a/src/test/java/org/apache/commons/imaging/formats/pnm/PbmFileInfoTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/pnm/PbmFileInfoTest.java
@@ -25,7 +25,7 @@ import java.io.InputStream;
 
 import org.junit.jupiter.api.Test;
 
-public class PbmFileInfoTest {
+class PbmFileInfoTest {
 
     @Test
     void testGetRGBThrowsIOException() throws IOException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/pnm/PgmFileInfoTest.java 
b/src/test/java/org/apache/commons/imaging/formats/pnm/PgmFileInfoTest.java
index 0d949a08..6dbdffe5 100644
--- a/src/test/java/org/apache/commons/imaging/formats/pnm/PgmFileInfoTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/pnm/PgmFileInfoTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class PgmFileInfoTest {
+class PgmFileInfoTest {
 
     @Test
     void testCreateThrowsImageReadExceptionOne() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/pnm/PnmImageParserTest.java 
b/src/test/java/org/apache/commons/imaging/formats/pnm/PnmImageParserTest.java
index a0b60f7c..5ed7e997 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/pnm/PnmImageParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/pnm/PnmImageParserTest.java
@@ -32,7 +32,7 @@ import org.apache.commons.imaging.Imaging;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class PnmImageParserTest {
+class PnmImageParserTest {
 
     private static final Charset US_ASCII = StandardCharsets.US_ASCII;
 
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/pnm/PpmFileInfoTest.java 
b/src/test/java/org/apache/commons/imaging/formats/pnm/PpmFileInfoTest.java
index 4d3cc2f9..0d65a1d4 100644
--- a/src/test/java/org/apache/commons/imaging/formats/pnm/PpmFileInfoTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/pnm/PpmFileInfoTest.java
@@ -27,7 +27,7 @@ import org.junit.jupiter.api.Test;
  * @see PpmFileInfo
  *
  **/
-public class PpmFileInfoTest {
+class PpmFileInfoTest {
 
     @Test
     void testCreatesPpmFileInfoOne() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/pnm/WhiteSpaceReaderTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/pnm/WhiteSpaceReaderTest.java
index 54989674..01845507 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/pnm/WhiteSpaceReaderTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/pnm/WhiteSpaceReaderTest.java
@@ -24,7 +24,7 @@ import java.util.Arrays;
 
 import org.junit.jupiter.api.Test;
 
-public class WhiteSpaceReaderTest {
+class WhiteSpaceReaderTest {
 
     @Test
     void testReadLineReturningNonEmptyString() throws IOException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/psd/ImageResourceBlockTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/psd/ImageResourceBlockTest.java
index d8da894a..d40b34d5 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/psd/ImageResourceBlockTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/psd/ImageResourceBlockTest.java
@@ -22,7 +22,7 @@ import java.nio.charset.StandardCharsets;
 
 import org.junit.jupiter.api.Test;
 
-public class ImageResourceBlockTest {
+class ImageResourceBlockTest {
 
     @Test
     void testCreatesImageResourceBlockAndCallsGetName() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/psd/ImageResourceTypeTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/psd/ImageResourceTypeTest.java
index d47d4e86..63081293 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/psd/ImageResourceTypeTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/psd/ImageResourceTypeTest.java
@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.junit.jupiter.api.Test;
 
-public class ImageResourceTypeTest {
+class ImageResourceTypeTest {
 
     @Test
     void testGetDescriptionWithPositive() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/psd/PsdReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/psd/PsdReadTest.java
index 440cf3dd..6ee7cb32 100644
--- a/src/test/java/org/apache/commons/imaging/formats/psd/PsdReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/psd/PsdReadTest.java
@@ -29,7 +29,7 @@ import org.apache.commons.imaging.common.ImageMetadata;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class PsdReadTest extends AbstractPsdTest {
+class PsdReadTest extends AbstractPsdTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserCmykTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserCmykTest.java
index 5b3902f2..2f0a249e 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserCmykTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserCmykTest.java
@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.junit.jupiter.api.Test;
 
-public class DataParserCmykTest {
+class DataParserCmykTest {
 
     @Test
     void testGetBasicChannelsCount() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserGrayscaleTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserGrayscaleTest.java
index 3fdcf360..4b6f22a7 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserGrayscaleTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserGrayscaleTest.java
@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.junit.jupiter.api.Test;
 
-public class DataParserGrayscaleTest {
+class DataParserGrayscaleTest {
 
     @Test
     void testGetBasicChannelsCount() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserIndexedTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserIndexedTest.java
index de8b6c2f..86aa3f39 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserIndexedTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserIndexedTest.java
@@ -22,7 +22,7 @@ import static org.junit.jupiter.api.Assertions.fail;
 
 import org.junit.jupiter.api.Test;
 
-public class DataParserIndexedTest {
+class DataParserIndexedTest {
 
     @Test
     void 
testFailsToCreateDataParserIndexedThrowsArrayIndexOutOfBoundsException() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserLabTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserLabTest.java
index b2914283..6919c48d 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserLabTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/psd/dataparsers/DataParserLabTest.java
@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.junit.jupiter.api.Test;
 
-public class DataParserLabTest {
+class DataParserLabTest {
 
     @Test
     void testGetBasicChannelsCount() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/rgbe/RgbeReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/rgbe/RgbeReadTest.java
index fa26ae58..dbfd9b5d 100644
--- a/src/test/java/org/apache/commons/imaging/formats/rgbe/RgbeReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/rgbe/RgbeReadTest.java
@@ -33,7 +33,7 @@ import org.apache.commons.imaging.internal.Debug;
 import org.apache.commons.imaging.test.TestResources;
 import org.junit.jupiter.api.Test;
 
-public class RgbeReadTest extends AbstractRgbeTest {
+class RgbeReadTest extends AbstractRgbeTest {
 
     @Test
     void test() throws IOException, ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/JpegImageDataTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/JpegImageDataTest.java
index 3d2db5cf..d6ef2e3a 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/JpegImageDataTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/JpegImageDataTest.java
@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.junit.jupiter.api.Test;
 
-public class JpegImageDataTest {
+class JpegImageDataTest {
 
     @Test
     void testCreatesJpegImageDataAndCallsGetElementDescription() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffAlphaRoundTripTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffAlphaRoundTripTest.java
index 9b88d621..6f464bf6 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffAlphaRoundTripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffAlphaRoundTripTest.java
@@ -41,7 +41,7 @@ import org.junit.jupiter.api.io.TempDir;
 /**
  * Performs a round-trip that writes an image containing Alpha and then reads 
it back. Selected non-opaque pixels are tested for correctness,
  */
-public class TiffAlphaRoundTripTest {
+class TiffAlphaRoundTripTest {
 
     @TempDir
     Path tempDir;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffBigTiffTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffBigTiffTest.java
index ea49585e..36e50978 100644
--- a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffBigTiffTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffBigTiffTest.java
@@ -30,7 +30,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Reads files in the BigTIFF samples folder and compares the BigTIFF files 
against the standard "classic" tiff image.
  */
-public class TiffBigTiffTest extends AbstractTiffTest {
+class TiffBigTiffTest extends AbstractTiffTest {
 
     private boolean doImagesMatch(final int w, final int h, final int[] 
classicRgb, final BufferedImage image) {
         final int iW = image.getWidth();
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffCcittTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffCcittTest.java
index 290606d8..558a0e85 100644
--- a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffCcittTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffCcittTest.java
@@ -31,7 +31,7 @@ import 
org.apache.commons.imaging.formats.tiff.itu_t4.T4AndT6Compression;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class TiffCcittTest extends AbstractTiffTest {
+class TiffCcittTest extends AbstractTiffTest {
 
     /**
      * Generates the next combination of elements in the sequence array, with 
each element having a maximum value of max. Initially, the sequence should be 
set
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointMultivariableTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointMultivariableTest.java
index bdac8518..33bdcdfe 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointMultivariableTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointMultivariableTest.java
@@ -46,7 +46,7 @@ import org.junit.jupiter.api.io.TempDir;
  * At this time, Commons Imaging does not fully implement the floating-point 
specification. Currently, this class only tests the use of uncompressed floating
  * point values in the Strips format. The Tiles format is not exercised.
  */
-public class TiffFloatingPointMultivariableTest extends AbstractTiffTest {
+class TiffFloatingPointMultivariableTest extends AbstractTiffTest {
 
     @TempDir
     Path tempDir;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointReadTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointReadTest.java
index b237c89e..4abc60cc 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointReadTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointReadTest.java
@@ -41,7 +41,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Performs tests that access the content of TIFF files containing floating 
point data.
  */
-public class TiffFloatingPointReadTest {
+class TiffFloatingPointReadTest {
 
     private void checkSubImage(final File target, final AbstractTiffRasterData 
fullRaster, final int x0, final int y0, final int width, final int height)
             throws ImagingException, IOException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointRoundTripTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointRoundTripTest.java
index 8b4926ec..7b91317e 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointRoundTripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffFloatingPointRoundTripTest.java
@@ -46,7 +46,7 @@ import org.junit.jupiter.api.io.TempDir;
  * At this time, Commons Imaging does not fully implement the floating-point 
specification. Currently, this class only tests the use of uncompressed floating
  * point values in the Strips format. The Tiles format is not exercised.
  */
-public class TiffFloatingPointRoundTripTest extends AbstractTiffTest {
+class TiffFloatingPointRoundTripTest extends AbstractTiffTest {
 
     @TempDir
     Path tempDir;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffImageParserTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffImageParserTest.java
index 96762fbf..c4d50327 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffImageParserTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffImageParserTest.java
@@ -28,7 +28,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests Google oss-fuzz issue 53669.
  */
-public class TiffImageParserTest {
+class TiffImageParserTest {
 
     @Test
     void testOssFuzzIssue53669() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffJpegTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffJpegTest.java
index b65b760d..ce399682 100644
--- a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffJpegTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffJpegTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Reads files in the BigTIFF samples folder and compares the BigTIFF files 
against the standard "classic" tiff image.
  */
-public class TiffJpegTest extends AbstractTiffTest {
+class TiffJpegTest extends AbstractTiffTest {
 
     static final String[] testSet0 = { "TestSample.tiff", 
"TestJpegStrips.tiff", "TestJpegTiles.tiff", "TestJpegStripsRgb.tiff", 
"TestJpegTilesRgb.tiff",
             "TestJpegCMYK.tiff" };
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffLzwTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffLzwTest.java
index 265cc880..2dd0217f 100644
--- a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffLzwTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffLzwTest.java
@@ -35,7 +35,7 @@ import org.apache.commons.imaging.mylzw.MyLzwDecompressor;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
-public class TiffLzwTest extends AbstractTiffTest {
+class TiffLzwTest extends AbstractTiffTest {
 
     private void compressRoundtripAndValidate(final byte[] src) throws 
IOException, ImagingException {
         final boolean DEBUG = false;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterDataIntTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterDataIntTest.java
index 10758089..a70ba656 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterDataIntTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterDataIntTest.java
@@ -26,7 +26,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Provides unit test for the raster-data class.
  */
-public class TiffRasterDataIntTest {
+class TiffRasterDataIntTest {
 
     int width = 11;
     int height = 10;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterDataTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterDataTest.java
index f6ef57b6..4dc5a37a 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterDataTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterDataTest.java
@@ -26,7 +26,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Provides unit test for the raster-data class.
  */
-public class TiffRasterDataTest {
+class TiffRasterDataTest {
 
     int width = 11;
     int height = 10;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterStatisticsTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterStatisticsTest.java
index 398856b9..17f33833 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterStatisticsTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRasterStatisticsTest.java
@@ -28,7 +28,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Provides unit tests for the TIFF simple-statistics class
  */
-public class TiffRasterStatisticsTest {
+class TiffRasterStatisticsTest {
 
     int width = 11;
     int height = 10;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadAlphaTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadAlphaTest.java
index ca9de68e..fc6e9011 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadAlphaTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadAlphaTest.java
@@ -32,7 +32,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Performs tests that access the content of TIFF files containing non-opaque 
alpha-channel pixels
  */
-public class TiffReadAlphaTest {
+class TiffReadAlphaTest {
 
     private static final String[] names = { 
"TransparencyTestStripAssociated.tif", "TransparencyTestStripUnassociated.tif",
             "TransparencyTestTileAssociated.tif", 
"TransparencyTestTileUnassociated.tif" };
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadImageInfoTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadImageInfoTest.java
index b0abce05..59568747 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadImageInfoTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadImageInfoTest.java
@@ -29,7 +29,7 @@ import org.junit.jupiter.api.Test;
  * Performs a test on the ImageInfo returned from TIFF to confirm that it 
contains the specified value for a particular target. This test is used to 
confirm
  * that the TiffImageParser is correctly interpreting the ImageInfo values.
  */
-public class TiffReadImageInfoTest extends AbstractTiffTest {
+class TiffReadImageInfoTest extends AbstractTiffTest {
 
     // The form of the test set is
     // 0. target file name
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadTest.java
index c5c97b8a..d044f0c1 100644
--- a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadTest.java
@@ -32,7 +32,7 @@ import org.apache.commons.imaging.common.ImageMetadata;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class TiffReadTest extends AbstractTiffTest {
+class TiffReadTest extends AbstractTiffTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadWriteTagsTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadWriteTagsTest.java
index 2b12c06a..8f613833 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadWriteTagsTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffReadWriteTagsTest.java
@@ -35,7 +35,7 @@ import 
org.apache.commons.imaging.formats.tiff.write.TiffOutputDirectory;
 import org.apache.commons.imaging.formats.tiff.write.TiffOutputSet;
 import org.junit.jupiter.api.Test;
 
-public class TiffReadWriteTagsTest extends AbstractTiffTest {
+class TiffReadWriteTagsTest extends AbstractTiffTest {
 
     @Test
     void testReadWriteTags() throws ImagingException, ImagingException, 
IOException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRoundTripInt32Test.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRoundTripInt32Test.java
index 5d885c1b..e35968f7 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRoundTripInt32Test.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRoundTripInt32Test.java
@@ -41,7 +41,7 @@ import org.junit.jupiter.api.io.TempDir;
  * matches the original values. The primary purpose of this test is to verify 
that the TIFF data reader classes behave correctly when reading raster data in
  * various formats.
  */
-public class TiffRoundTripInt32Test extends AbstractTiffTest {
+class TiffRoundTripInt32Test extends AbstractTiffTest {
 
     @TempDir
     Path tempDir;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRoundtripTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRoundtripTest.java
index de3ece60..7e05d2f3 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRoundtripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffRoundtripTest.java
@@ -31,7 +31,7 @@ import 
org.apache.commons.imaging.formats.tiff.constants.TiffConstants;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class TiffRoundtripTest extends AbstractTiffTest {
+class TiffRoundtripTest extends AbstractTiffTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffShortIntRoundTripTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffShortIntRoundTripTest.java
index 5fbf97bf..4d6a211d 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffShortIntRoundTripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffShortIntRoundTripTest.java
@@ -41,7 +41,7 @@ import org.junit.jupiter.api.io.TempDir;
  * matches the original values. The primary purpose of this test is to verify 
that the TIFF data reader classes behave correctly when reading raster data in
  * various formats.
  */
-public class TiffShortIntRoundTripTest extends AbstractTiffTest {
+class TiffShortIntRoundTripTest extends AbstractTiffTest {
 
     @TempDir
     Path tempDir;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffSubImageTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffSubImageTest.java
index 4661b794..b35f512c 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffSubImageTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffSubImageTest.java
@@ -29,7 +29,7 @@ import org.apache.commons.imaging.Imaging;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class TiffSubImageTest extends AbstractTiffTest {
+class TiffSubImageTest extends AbstractTiffTest {
     final List<File> imageFileList;
 
     TiffSubImageTest() throws IOException, ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagIntegrityTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagIntegrityTest.java
index ccf15dc4..943ee4ed 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagIntegrityTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagIntegrityTest.java
@@ -47,7 +47,7 @@ import 
org.apache.commons.imaging.formats.tiff.constants.WangTagConstants;
 import org.apache.commons.imaging.formats.tiff.taginfos.TagInfo;
 import org.junit.jupiter.api.Test;
 
-public class TiffTagIntegrityTest extends AbstractImagingTest {
+class TiffTagIntegrityTest extends AbstractImagingTest {
 
     @Test
     void testTagIntegrity() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagsTest.java 
b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagsTest.java
index 57714e1c..ae4dcb45 100644
--- a/src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagsTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/tiff/TiffTagsTest.java
@@ -21,7 +21,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import org.apache.commons.imaging.formats.tiff.taginfos.TagInfo;
 import org.junit.jupiter.api.Test;
 
-public class TiffTagsTest {
+class TiffTagsTest {
 
     @Test
     void testGetTagWithNegativeAndPositive() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/datareaders/DataReaderStripsTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/datareaders/DataReaderStripsTest.java
index 7ec9e0a3..b5862e8e 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/datareaders/DataReaderStripsTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/datareaders/DataReaderStripsTest.java
@@ -21,7 +21,7 @@ import static 
org.junit.jupiter.api.Assertions.assertArrayEquals;
 import 
org.apache.commons.imaging.formats.tiff.constants.TiffPlanarConfiguration;
 import org.junit.jupiter.api.Test;
 
-public class DataReaderStripsTest {
+class DataReaderStripsTest {
     @Test
     void testApplyPredictor() {
         final int[] bitsPerPixel = { 1, 2, 3 };
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeAsciiTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeAsciiTest.java
index 9a2e193b..08bac64b 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeAsciiTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeAsciiTest.java
@@ -31,7 +31,7 @@ import org.junit.jupiter.api.Test;
  * @see FieldTypeAscii
  *
  **/
-public class FieldTypeAsciiTest {
+class FieldTypeAsciiTest {
 
     @Test
     void testCreatesFieldTypeAsciiAndCallsWriteData() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeByteTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeByteTest.java
index 93150047..69c5815b 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeByteTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeByteTest.java
@@ -23,7 +23,7 @@ import java.nio.ByteOrder;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class FieldTypeByteTest {
+class FieldTypeByteTest {
 
     @Test
     void testWriteDataWithNull() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeLongTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeLongTest.java
index 0f7b0764..73eb593d 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeLongTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeLongTest.java
@@ -23,7 +23,7 @@ import java.nio.ByteOrder;
 
 import org.junit.jupiter.api.Test;
 
-public class FieldTypeLongTest {
+class FieldTypeLongTest {
 
     @Test
     void testWriteDataWithNonNull() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeRationalTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeRationalTest.java
index 43f13d30..910f6c9b 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeRationalTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeRationalTest.java
@@ -30,7 +30,7 @@ import org.junit.jupiter.api.Test;
  * @see FieldTypeRational
  *
  **/
-public class FieldTypeRationalTest {
+class FieldTypeRationalTest {
 
     @Test
     void testWriteDataWithNonNull() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeShortTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeShortTest.java
index 96a607ae..8dad54b4 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeShortTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeShortTest.java
@@ -23,7 +23,7 @@ import java.nio.ByteOrder;
 
 import org.junit.jupiter.api.Test;
 
-public class FieldTypeShortTest {
+class FieldTypeShortTest {
 
     @Test
     void testCreatesFieldTypeShortAndCallsWriteData() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeTest.java
index 52f393f1..03f82cdf 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/fieldtypes/FieldTypeTest.java
@@ -21,7 +21,7 @@ import static org.junit.jupiter.api.Assertions.fail;
 
 import org.junit.jupiter.api.Test;
 
-public class FieldTypeTest {
+class FieldTypeTest {
 
     @Test
     void testGetFieldTypeWithNegative() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/itu_t4/HuffmanTreeExceptionTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/itu_t4/HuffmanTreeExceptionTest.java
index 50e120e1..43697033 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/itu_t4/HuffmanTreeExceptionTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/itu_t4/HuffmanTreeExceptionTest.java
@@ -21,7 +21,7 @@ import static 
org.junit.jupiter.api.Assertions.assertNotEquals;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class HuffmanTreeExceptionTest {
+class HuffmanTreeExceptionTest {
 
     @Test
     void testCreatesHuffmanTreeExceptionTakingString() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/itu_t4/T4_T6_TablesTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/itu_t4/T4_T6_TablesTest.java
index 753fe032..354d90ca 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/itu_t4/T4_T6_TablesTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/itu_t4/T4_T6_TablesTest.java
@@ -22,7 +22,7 @@ import java.util.Arrays;
 
 import org.junit.jupiter.api.Test;
 
-public class T4_T6_TablesTest {
+class T4_T6_TablesTest {
 
     @Test
     void testCreatesT4_T6_TablesTakingNoArgumentsAndCallsWriteBits() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/PhotometricInterpreterLogLuvTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/PhotometricInterpreterLogLuvTest.java
index 2b0280dc..f208fe0e 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/PhotometricInterpreterLogLuvTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/PhotometricInterpreterLogLuvTest.java
@@ -27,7 +27,7 @@ import 
org.apache.commons.imaging.formats.tiff.photometricinterpreters.Photometr
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class PhotometricInterpreterLogLuvTest {
+class PhotometricInterpreterLogLuvTest {
 
     private PhotometricInterpreterLogLuv p;
 
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/PhotometricInterpreterRgbTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/PhotometricInterpreterRgbTest.java
index 1b35c7d5..276120e9 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/PhotometricInterpreterRgbTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/PhotometricInterpreterRgbTest.java
@@ -25,7 +25,7 @@ import org.apache.commons.imaging.common.ImageBuilder;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class PhotometricInterpreterRgbTest {
+class PhotometricInterpreterRgbTest {
 
     private PhotometricInterpreterRgb p;
 
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForRangeTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForRangeTest.java
index 218fdb95..b2baf9cf 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForRangeTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForRangeTest.java
@@ -28,7 +28,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Performs unit tests for palette entries based on range of values.
  */
-public class PaletteEntryForRangeTest {
+class PaletteEntryForRangeTest {
 
     public PaletteEntryForRangeTest() {
     }
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForValueTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForValueTest.java
index 1946e739..3471b0d7 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForValueTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForValueTest.java
@@ -30,7 +30,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Performs unit tests for palette entries based on single-value targets.
  */
-public class PaletteEntryForValueTest {
+class PaletteEntryForValueTest {
 
     public PaletteEntryForValueTest() {
     }
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PhotometricInterpreterFloatTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PhotometricInterpreterFloatTest.java
index 4f2e6b12..77a9c9c9 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PhotometricInterpreterFloatTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PhotometricInterpreterFloatTest.java
@@ -33,7 +33,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Provides a unit test for the TIFF photometric interpreter used for mapping 
floating-point values to a color palette.
  */
-public class PhotometricInterpreterFloatTest {
+class PhotometricInterpreterFloatTest {
 
     private static PhotometricInterpreterFloat pInterp;
     private static PhotometricInterpreterFloat bandedInterp;
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoByteOrShortTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoByteOrShortTest.java
index c17b876d..a8b70513 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoByteOrShortTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoByteOrShortTest.java
@@ -24,7 +24,7 @@ import java.nio.ByteOrder;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.junit.jupiter.api.Test;
 
-public class TagInfoByteOrShortTest {
+class TagInfoByteOrShortTest {
 
     @Test
     void testEncodeValueTakingByteOrderAndByteArrayOne() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoByteTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoByteTest.java
index 1798bd7d..adc2a48d 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoByteTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoByteTest.java
@@ -21,7 +21,7 @@ import static 
org.junit.jupiter.api.Assertions.assertArrayEquals;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.junit.jupiter.api.Test;
 
-public class TagInfoByteTest {
+class TagInfoByteTest {
 
     @Test
     void testCreatesTagInfoByteTakingFourArgumentsAndCallsEncodeValue() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSByteTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSByteTest.java
index 41f25c99..dfa41d10 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSByteTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSByteTest.java
@@ -23,7 +23,7 @@ import java.nio.ByteOrder;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.junit.jupiter.api.Test;
 
-public class TagInfoSByteTest {
+class TagInfoSByteTest {
 
     @Test
     void testCreatesTagInfoSByteAndCallsEncodeValue() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSBytesTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSBytesTest.java
index 8ac5ae1f..6251d056 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSBytesTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSBytesTest.java
@@ -23,7 +23,7 @@ import java.nio.ByteOrder;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.junit.jupiter.api.Test;
 
-public class TagInfoSBytesTest {
+class TagInfoSBytesTest {
 
     @Test
     void testCreatesTagInfoSBytesAndCallsEncodeValue() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSLongTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSLongTest.java
index 93d811db..b7b39e86 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSLongTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSLongTest.java
@@ -23,7 +23,7 @@ import java.nio.ByteOrder;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.junit.jupiter.api.Test;
 
-public class TagInfoSLongTest {
+class TagInfoSLongTest {
 
     @Test
     void testEncodeValue() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortTest.java
index fc94e975..46bd56ac 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortTest.java
@@ -23,7 +23,7 @@ import java.nio.ByteOrder;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.junit.jupiter.api.Test;
 
-public class TagInfoSShortTest {
+class TagInfoSShortTest {
 
     @Test
     void testGetValue() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortsTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortsTest.java
index e71d7eac..c67de40d 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortsTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoSShortsTest.java
@@ -23,7 +23,7 @@ import java.nio.ByteOrder;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.junit.jupiter.api.Test;
 
-public class TagInfoSShortsTest {
+class TagInfoSShortsTest {
 
     @Test
     void testEncodeValue() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoUnknownTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoUnknownTest.java
index d9c99f80..95731c47 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoUnknownTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/taginfos/TagInfoUnknownTest.java
@@ -21,7 +21,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryType;
 import org.junit.jupiter.api.Test;
 
-public class TagInfoUnknownTest {
+class TagInfoUnknownTest {
 
     @Test
     void testCreatesTagInfoUnknown() {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputDirectoryTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputDirectoryTest.java
index 3bd390ec..9d5acd1c 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputDirectoryTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputDirectoryTest.java
@@ -26,7 +26,7 @@ import 
org.apache.commons.imaging.formats.tiff.constants.TiffDirectoryConstants;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class TiffOutputDirectoryTest {
+class TiffOutputDirectoryTest {
 
     private TiffOutputDirectory directory;
 
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputSetTest.java
 
b/src/test/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputSetTest.java
index 7cfaa315..a1da43c4 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputSetTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputSetTest.java
@@ -23,7 +23,7 @@ import 
org.apache.commons.imaging.formats.tiff.constants.GpsTagConstants;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class TiffOutputSetTest {
+class TiffOutputSetTest {
 
     private TiffOutputSet tiffOutputSet;
 
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/wbmp/WbmpReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/wbmp/WbmpReadTest.java
index da05ab25..e003fc35 100644
--- a/src/test/java/org/apache/commons/imaging/formats/wbmp/WbmpReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/wbmp/WbmpReadTest.java
@@ -27,7 +27,7 @@ import org.apache.commons.imaging.common.ImageMetadata;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class WbmpReadTest extends AbstractWbmpTest {
+class WbmpReadTest extends AbstractWbmpTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/webp/WebPDumpTest.java 
b/src/test/java/org/apache/commons/imaging/formats/webp/WebPDumpTest.java
index 6a03f6ee..cfe8c605 100644
--- a/src/test/java/org/apache/commons/imaging/formats/webp/WebPDumpTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/webp/WebPDumpTest.java
@@ -32,7 +32,7 @@ import org.junit.jupiter.params.provider.MethodSource;
 /**
  * Test the methods that dump data into streams.
  */
-public class WebPDumpTest extends AbstractWebPTest {
+class WebPDumpTest extends AbstractWebPTest {
 
     /**
      * @param imageFile parameterized test image.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/webp/WebPMetadataTest.java 
b/src/test/java/org/apache/commons/imaging/formats/webp/WebPMetadataTest.java
index b0e74bb9..4ccede3b 100644
--- 
a/src/test/java/org/apache/commons/imaging/formats/webp/WebPMetadataTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/formats/webp/WebPMetadataTest.java
@@ -32,7 +32,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests for the WebP metadata.
  */
-public class WebPMetadataTest extends AbstractWebPTest {
+class WebPMetadataTest extends AbstractWebPTest {
 
     /**
      * @throws Exception if it cannot open the images.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/webp/WebPReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/webp/WebPReadTest.java
index f409af4e..67fc179c 100644
--- a/src/test/java/org/apache/commons/imaging/formats/webp/WebPReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/webp/WebPReadTest.java
@@ -39,7 +39,7 @@ import org.junit.jupiter.params.provider.MethodSource;
 /**
  * Tests that read WebP images.
  */
-public class WebPReadTest extends AbstractWebPTest {
+class WebPReadTest extends AbstractWebPTest {
 
     /**
      * Not implemented yet.
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/xbm/XbmReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/xbm/XbmReadTest.java
index 31f2b197..1c0138e2 100644
--- a/src/test/java/org/apache/commons/imaging/formats/xbm/XbmReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/xbm/XbmReadTest.java
@@ -27,7 +27,7 @@ import org.apache.commons.imaging.common.ImageMetadata;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class XbmReadTest extends AbstractXbmTest {
+class XbmReadTest extends AbstractXbmTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/xmp/XmpDumpTest.java 
b/src/test/java/org/apache/commons/imaging/formats/xmp/XmpDumpTest.java
index e2877404..4ad4c418 100644
--- a/src/test/java/org/apache/commons/imaging/formats/xmp/XmpDumpTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/xmp/XmpDumpTest.java
@@ -26,7 +26,7 @@ import org.apache.commons.imaging.Imaging;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class XmpDumpTest extends AbstractImagingTest {
+class XmpDumpTest extends AbstractImagingTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/formats/xpm/XpmReadTest.java 
b/src/test/java/org/apache/commons/imaging/formats/xpm/XpmReadTest.java
index 4eefd5cb..35e945a0 100644
--- a/src/test/java/org/apache/commons/imaging/formats/xpm/XpmReadTest.java
+++ b/src/test/java/org/apache/commons/imaging/formats/xpm/XpmReadTest.java
@@ -27,7 +27,7 @@ import org.apache.commons.imaging.common.ImageMetadata;
 import org.apache.commons.imaging.internal.Debug;
 import org.junit.jupiter.api.Test;
 
-public class XpmReadTest extends AbstractXpmTest {
+class XpmReadTest extends AbstractXpmTest {
 
     @Test
     void test() throws Exception {
diff --git 
a/src/test/java/org/apache/commons/imaging/palette/DitheringTest.java 
b/src/test/java/org/apache/commons/imaging/palette/DitheringTest.java
index e6ae2de7..ec7e8194 100644
--- a/src/test/java/org/apache/commons/imaging/palette/DitheringTest.java
+++ b/src/test/java/org/apache/commons/imaging/palette/DitheringTest.java
@@ -28,7 +28,7 @@ import org.junit.jupiter.api.Test;
 /**
  * Tests for class {@link Dithering}.
  **/
-public class DitheringTest {
+class DitheringTest {
 
     @Test
     void testApplyFloydSteinbergDitheringWithNonNullOne() throws 
ImagingException {
diff --git 
a/src/test/java/org/apache/commons/imaging/palette/PaletteQuantizationTest.java 
b/src/test/java/org/apache/commons/imaging/palette/PaletteQuantizationTest.java
index 6f6b47c1..6a874c61 100644
--- 
a/src/test/java/org/apache/commons/imaging/palette/PaletteQuantizationTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/palette/PaletteQuantizationTest.java
@@ -24,7 +24,7 @@ import org.apache.commons.imaging.AbstractImagingTest;
 import org.apache.commons.imaging.ImagingException;
 import org.junit.jupiter.api.Test;
 
-public class PaletteQuantizationTest extends AbstractImagingTest {
+class PaletteQuantizationTest extends AbstractImagingTest {
 
     private void checkPaletteDetails(final BufferedImage image, final int 
limit, final int expectedSize) throws ImagingException {
         final PaletteFactory paletteFactory = new PaletteFactory();
diff --git 
a/src/test/java/org/apache/commons/imaging/palette/SimplePaletteTest.java 
b/src/test/java/org/apache/commons/imaging/palette/SimplePaletteTest.java
index e0452667..cb38cb75 100644
--- a/src/test/java/org/apache/commons/imaging/palette/SimplePaletteTest.java
+++ b/src/test/java/org/apache/commons/imaging/palette/SimplePaletteTest.java
@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.junit.jupiter.api.Test;
 
-public class SimplePaletteTest {
+class SimplePaletteTest {
 
     @Test
     void testGetPaletteIndexReturningNegative() {
diff --git 
a/src/test/java/org/apache/commons/imaging/roundtrip/BitmapRoundtripTest.java 
b/src/test/java/org/apache/commons/imaging/roundtrip/BitmapRoundtripTest.java
index 8806752b..aedb67aa 100644
--- 
a/src/test/java/org/apache/commons/imaging/roundtrip/BitmapRoundtripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/roundtrip/BitmapRoundtripTest.java
@@ -24,7 +24,7 @@ import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class BitmapRoundtripTest extends RoundtripBase {
+class BitmapRoundtripTest extends RoundtripBase {
 
     public static BufferedImage[] images = { 
TestImages.createArgbBitmapImage(1, 1), // minimal
             TestImages.createArgbBitmapImage(2, 2), //
diff --git 
a/src/test/java/org/apache/commons/imaging/roundtrip/GrayscaleRountripTest.java 
b/src/test/java/org/apache/commons/imaging/roundtrip/GrayscaleRountripTest.java
index fa4b9c8c..1c5d1548 100644
--- 
a/src/test/java/org/apache/commons/imaging/roundtrip/GrayscaleRountripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/roundtrip/GrayscaleRountripTest.java
@@ -24,7 +24,7 @@ import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class GrayscaleRountripTest extends RoundtripBase {
+class GrayscaleRountripTest extends RoundtripBase {
 
     public static BufferedImage[] images = { 
TestImages.createArgbBitmapImage(1, 1), // minimal
             TestImages.createArgbGrayscaleImage(2, 2), //
diff --git 
a/src/test/java/org/apache/commons/imaging/roundtrip/LimitedColorRoundtripTest.java
 
b/src/test/java/org/apache/commons/imaging/roundtrip/LimitedColorRoundtripTest.java
index 19223b91..5dc9d731 100644
--- 
a/src/test/java/org/apache/commons/imaging/roundtrip/LimitedColorRoundtripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/roundtrip/LimitedColorRoundtripTest.java
@@ -24,7 +24,7 @@ import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class LimitedColorRoundtripTest extends RoundtripBase {
+class LimitedColorRoundtripTest extends RoundtripBase {
 
     public static BufferedImage[] images = { 
TestImages.createLimitedColorImage(1, 1), // minimal
             TestImages.createLimitedColorImage(2, 2), //
diff --git 
a/src/test/java/org/apache/commons/imaging/roundtrip/NullParametersRoundtripTest.java
 
b/src/test/java/org/apache/commons/imaging/roundtrip/NullParametersRoundtripTest.java
index aa642c3b..eb488aad 100644
--- 
a/src/test/java/org/apache/commons/imaging/roundtrip/NullParametersRoundtripTest.java
+++ 
b/src/test/java/org/apache/commons/imaging/roundtrip/NullParametersRoundtripTest.java
@@ -28,7 +28,7 @@ import org.apache.commons.imaging.Imaging;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class NullParametersRoundtripTest extends RoundtripBase {
+class NullParametersRoundtripTest extends RoundtripBase {
 
     public static Stream<FormatInfo> data() {
         return Stream.of(FormatInfo.READ_WRITE_FORMATS);