diff --git a/test/main.t b/test/main.t
index 69c9e5b..a4975b2 100755
--- a/test/main.t
+++ b/test/main.t
@@ -491,8 +491,11 @@ testcopyrename='
 	cd gitrepo &&
 	cp content content-copy &&
 	# recent git-fast-export is (too) picky in recognizing copies
-	# although git-log is not as picky (????)
-	# echo one > content &&
+	# although git-log is not as picky;
+	# since https://github.com/git/git/commit/8096e1d385660c159d9d47e69b2be63cf22e4f31
+	# a copy is only marked if source filed not modified as well
+	# (though destination file can be modified)
+	echo one >> content-copy &&
 	git add content content-copy &&
 	git commit -m copy &&
 	git mv content-copy content-moved