diff --git a/layout/style/ServoStyleSet.cpp b/layout/style/ServoStyleSet.cpp
index 2db96d969c94..3993d06e4026 100644
--- a/layout/style/ServoStyleSet.cpp
+++ b/layout/style/ServoStyleSet.cpp
@@ -1330,11 +1330,6 @@ ServoStyleSet::UpdateStylist()
     mBindingManager->UpdateBoundContentBindingsForServo(mPresContext);
   }
 
-  // We need to invalidate cached style in getComputedStyle for undisplayed
-  // elements, since we don't know if any of the style sheet change that we
-  // do would affect undisplayed elements.
-  mPresContext->RestyleManager()->AsServo()->IncrementUndisplayedRestyleGeneration();
-
   mStylistState = StylistState::NotDirty;
 }
 
diff --git a/layout/style/test/test_computed_style.html b/layout/style/test/test_computed_style.html
index 37f0aa3c733c..b1d37df75ce0 100644
--- a/layout/style/test/test_computed_style.html
+++ b/layout/style/test/test_computed_style.html
@@ -4,12 +4,12 @@
   <title>Test for miscellaneous computed style issues</title>
   <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-  <style id="style"></style>
 </head>
 <body>
 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=">Mozilla Bug </a>
 <p id="display"></p>
 <div id="content" style="display: none">
+  
 </div>
 <pre id="test">
 <script type="application/javascript">
@@ -732,26 +732,6 @@ var noframe_container = document.getElementById("content");
   p.remove();
 })();
 
-(function test_bug_1418433() {
-  // Test that the style data read through getComputedStyle is always up-to-date,
-  // even for non-displayed elements.
-  var d = document.createElement("div");
-  d.setAttribute("id", "nonDisplayedDiv");
-  var cs = getComputedStyle(d, null);
-  noframe_container.appendChild(d);
-
-  var style = document.getElementById("style");
-  style.textContent = "#nonDisplayedDiv { height: 100px; }";
-  is(cs.height, "100px",
-     "computed value of display none element");
-  style.textContent = "#nonDisplayedDiv { height: 10px; }";
-  is(cs.height, "10px",
-     "computed value of display none element");
-
-  style.textContent = "";
-  d.remove();
-})();
-
 </script>
 </pre>
 </body>
