--- a/tests/test-transaction-safety.t	Tue May 04 05:18:57 2021 +0200
+++ b/tests/test-transaction-safety.t	Mon Mar 29 22:40:54 2021 +0200
@@ -1,7 +1,7 @@
 Test transaction safety
 =======================
 
-#testcases revlogv1 revlogv2
+#testcases revlogv1 revlogv2 changelogv2
 
 #if revlogv1
 
@@ -21,6 +21,15 @@
 
 #endif
 
+#if changelogv2
+
+  $ cat << EOF >> $HGRCPATH
+  > [format]
+  > exp-use-changelog-v2=enable-unstable-format-and-corrupt-my-data
+  > EOF
+
+#endif
+
 This test basic case to make sure external process do not see transaction
 content until it is committed.