diff --git a/modules/plugin/test/mochitest/test_npruntime_npninvokedefault.html b/modules/plugin/test/mochitest/test_npruntime_npninvokedefault.html
index 7963f9e471b2..6f7d10c1b7c5 100644
--- a/modules/plugin/test/mochitest/test_npruntime_npninvokedefault.html
+++ b/modules/plugin/test/mochitest/test_npruntime_npninvokedefault.html
@@ -52,7 +52,6 @@
     ["Boolean", new Boolean(false), true],
     ["Boolean", { "value": false }, true],
     // Date object
-    ["Date", 50000, Date(50000)],
     ["Date", "December 17, 1995 03:24:00", Date("December 17, 1995 03:24:00")],
     // Function object
     ["Function", "return 3", Function("return 3")],