diff --git a/tests/test-casefolding b/tests/test-casefolding
--- a/tests/test-casefolding
+++ b/tests/test-casefolding
@@ -31,6 +31,9 @@ hg ci -Am adda
 hg rm a
 hg ci -Am removea
 echo A > A
+# on linux hfs keeps the old case stored, force it
+mv a aa
+mv aa A
 hg ci -Am addA
 # Used to fail under case insensitive fs
 hg up -C 0