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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Transition Test: transition-delay - negative number</title>
+<link rel="author" title="Intel" href="http://www.intel.com">
+<link rel="author" title="Shiyou Tan" href="mailto:shiyoux.tan@intel.com">
+<link rel="help" title="2.4. The 'transition-delay' Property" href="http://www.w3.org/TR/css3-transitions/#transition-delay-property">
+<meta name="assert" content="Test checks that the 'transition-delay' property set negative number will not delay the execution of transition">
+<style>
+  div {
+    height: 100px;
+    transition-property: background-color;
+    width: 100px;
+  }
+  #ref {
+    background-color: gray;
+    transition-delay: 3s;
+  }
+  #test {
+    background-color: blue;
+    transition-delay: -3s;
+  }
+</style>
+<body>
+  <p>Click the blue square below. Test passes if the <strong>color</strong> of blue and gray squares is all changed to <strong>green</strong> immediately
+  when the number inside blue square is 3.</p>
+  <div id="ref"></div>
+  <div id="test">0</div>
+  <script>
+    var clicked = 0;
+    var ref = document.getElementById("ref");
+    var test = document.getElementById("test");
+    test.addEventListener("click", function(evt) {
+      if (clicked == 0) {
+        ref.setAttribute("style", "background-color: green;");
+        setInterval(function() {
+          if (clicked == 2) {
+            test.setAttribute("style", "background-color: green;");
+          }
+          clicked++;
+          test.innerHTML = clicked;
+        }, 1000);
+      }
+    }, false);
+  </script>
+</body>