--- a/tests/test-push-warn	Sat Dec 16 23:33:24 2006 +0100
+++ b/tests/test-push-warn	Sun Dec 17 05:00:22 2006 +0100
@@ -54,4 +54,9 @@
 hg push -f -r 3 -r 4 ../c; echo $?
 hg push -r 5 ../c; echo $?
 
+# issue 450
+hg init ../e
+hg push -r 0 ../e ; echo $?
+hg push -r 1 ../e ; echo $?
+
 exit 0