diff --git a/tests/test-basic b/tests/test-basic
--- a/tests/test-basic
+++ b/tests/test-basic
@@ -5,7 +5,7 @@ cd t
 hg init
 echo a > a
 hg add a
-hg commit -m test -d "0 0"
+hg commit -m test -d "1000000 0"
 hg history
 hg manifest
 hg cat a