--- a/tests/test-grep
+++ b/tests/test-grep
@@ -31,3 +31,22 @@ hg grep -f 'import$' port2
 echo deport >> port2
 hg commit -m 5 -u eggs -d '6 0'
 hg grep -f --all -nu port port2
+
+cd ..
+hg init t2
+cd t2
+hg grep foobar foo
+hg grep foobar
+echo blue >> color
+echo black >> color
+hg add color
+hg ci -m 0 -d '0 0'
+echo orange >> color
+hg ci -m 1 -d '0 0'
+echo black > color
+hg ci -m 2 -d '0 0'
+echo orange >> color
+echo blue >> color
+hg ci -m 3 -d '0 0'
+hg grep orange
+hg grep --all orange