diff --git a/tests/test-commit-copy b/tests/test-commit-copy
new file mode 100755
--- /dev/null
+++ b/tests/test-commit-copy
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+hg init dir
+cd dir
+echo bleh > bar
+hg add bar
+hg ci -m 'add bar'
+
+hg cp bar foo
+echo >> bar
+hg ci -m 'cp bar foo; change bar'
+
+hg debugrename foo
+hg debugindex .hg/data/bar.i