diff --git a/tests/test-git-export b/tests/test-git-export
--- a/tests/test-git-export
+++ b/tests/test-git-export
@@ -50,3 +50,7 @@ hg ci -mrenamemod -d '0 0'
 echo '% rename+mod+chmod'
 hg diff --git -r 6:tip | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
     -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"
+
+echo '% nonexistent in tip+chmod'
+hg diff --git -r 5:6 | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
+    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"