--- a/tests/test-tag
+++ b/tests/test-tag
@@ -19,6 +19,11 @@ hg tag -l -d "1000000 0" "bleah1" 1
 cat .hgtags
 cat .hg/localtags
 
+hg update 0
+hg tag -d "1000000 0" "foobar"
+cat .hgtags
+cat .hg/localtags
+
 hg tag -l 'xx
 newline'
 hg tag -l 'xx:xx'