diff --git a/tests/playTests.sh b/tests/playTests.sh
index b6028e7b5..83b0cd438 100755
--- a/tests/playTests.sh
+++ b/tests/playTests.sh
@@ -714,7 +714,7 @@ test -f tmp3
 test -f tmp4
 
 println "test : survive the list of files with too long filenames (--filelist=FILE)"
-datagen -g51M > tmp_badList
+datagen -g5M > tmp_badList
 zstd -f --filelist=tmp_badList && die "should have failed : file name length is too long"
 
 println "test : survive a list of files which is text garbage (--filelist=FILE)"