rmannibucau commented on a change in pull request #340:
URL: https://github.com/apache/maven-surefire/pull/340#discussion_r592500005



##########
File path: 
maven-surefire-common/src/main/java/org/apache/maven/plugin/surefire/AbstractSurefireMojo.java
##########
@@ -3623,9 +3623,20 @@ public void setSystemProperties( Properties 
systemProperties )
     }
 
     @SuppressWarnings( "UnusedDeclaration" )
-    public void setSystemPropertyVariables( Map<String, String> 
systemPropertyVariables )
+    public void setSystemPropertyVariables( Map<String, ?> 
systemPropertyVariables )
     {
-        this.systemPropertyVariables = systemPropertyVariables;
+        if (systemPropertyVariables != null)
+        {
+            this.systemPropertyVariables = new HashMap<>();
+            for ( final Map.Entry<String, ?> entry : 
systemPropertyVariables.entrySet() )
+            {
+                this.systemPropertyVariables.put( entry.getKey(), 
String.valueOf( entry.getValue() ) );

Review comment:
       Right, but once again it is not the main reason to not fix it there as 
explained.




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