--- a/layout/style/test/test_value_computation.html
+++ b/layout/style/test/test_value_computation.html
@@ -8,22 +8,16 @@
   <script type="text/javascript" src="property_database.js"></script>
   <style type="text/css" id="stylesheet"></style>
   <style type="text/css">
   /* For 'width', 'height', etc., need a constant size container. */
   #display { width: 500px; height: 200px }
   </style>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
   <script type="text/javascript">
-  var numAssertions = 9;
-
-  // these are from the additional margin-inline-{start,end} tests
-  numAssertions += 2;
-
-  SimpleTest.expectAssertions(numAssertions);
   SimpleTest.waitForExplicitFinish();
   SimpleTest.requestLongerTimeout(2);
 
   var load_count = 0;
   function load_done() {
     if (++load_count == 3)
       run_tests();
   }