diff --git a/tests/test-parentrevspec b/tests/test-parentrevspec
--- a/tests/test-parentrevspec
+++ b/tests/test-parentrevspec
@@ -59,7 +59,7 @@ lookup "6~" "6~1" "6~2" "6~3" "6~4" "6~5
 echo
 
 echo 'with a tag "6^" pointing to rev 1'
-hg tag -l -r 1 6^
+hg tag -l -r 1 "6^"
 lookup "6^" "6^1" "6~1" "6^^"
 echo