diff --git a/tests/test-permissions b/tests/test-permissions
--- a/tests/test-permissions
+++ b/tests/test-permissions
@@ -3,7 +3,7 @@
 hg init
 echo foo > a
 hg add a
-hg commit -m "1" -d "0 0"
+hg commit -m "1" -d "1000000 0"
 hg verify
 chmod -r .hg/data/a.d
 hg verify 2>/dev/null || echo verify failed
@@ -11,5 +11,5 @@ chmod +r .hg/data/a.d
 hg verify 2>/dev/null || echo verify failed
 chmod -w .hg/data/a.d
 echo barber > a
-hg commit -m "2" -d "0 0" 2>/dev/null || echo commit failed
+hg commit -m "2" -d "1000000 0" 2>/dev/null || echo commit failed