diff --git a/src/test/modules/test_extensions/Makefile b/src/test/modules/test_extensions/Makefile
index 05272e6a40..8e5849ebdf 100644
--- a/src/test/modules/test_extensions/Makefile
+++ b/src/test/modules/test_extensions/Makefile
@@ -27,8 +27,6 @@ DATA = test_ext1--1.0.sql test_ext2--1.0.sql test_ext3--1.0.sql \
 
 REGRESS = test_extensions test_extdepend
 
-# force C locale for output stability
-NO_LOCALE = 1
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config