diff --git a/testing/web-platform/meta/MANIFEST.json b/testing/web-platform/meta/MANIFEST.json
index 3b30e916de4a..3ad39bce3bdf 100644
--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -337542,7 +337542,9 @@
    "css/css-transitions/transitions-animatable-properties-01.html": [
     [
      "/css/css-transitions/transitions-animatable-properties-01.html",
-     {}
+     {
+      "timeout": "long"
+     }
     ]
    ],
    "css/css-transitions/zero-duration-multiple-transition.html": [
@@ -562743,7 +562745,7 @@
    "testharness"
   ],
   "css/css-transitions/transitions-animatable-properties-01.html": [
-   "06143d3061da89a148adda0e6bf2cf8f968f0f89",
+   "534f81839ac875ff6b5c5c7b17784258d7a8932c",
    "testharness"
   ],
   "css/css-transitions/zero-duration-multiple-transition.html": [
diff --git a/testing/web-platform/tests/css/css-transitions/transitions-animatable-properties-01.html b/testing/web-platform/tests/css/css-transitions/transitions-animatable-properties-01.html
index 06143d3061da..534f81839ac8 100644
--- a/testing/web-platform/tests/css/css-transitions/transitions-animatable-properties-01.html
+++ b/testing/web-platform/tests/css/css-transitions/transitions-animatable-properties-01.html
@@ -5,6 +5,7 @@
     <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
     <title> CSS Transitions: Animatable CSS properties </title>
     <meta name="assert" content="Check that all animatable CSS properties are animatable and then accepted by the 'transition-property' property">
+    <meta name="timeout" content="long">
     <link rel="author" title="Daniel Glazman" href="mailto:daniel.glazman@disruptive-innovations.com">
     <link rel="help" href="http://www.w3.org/TR/css3-transitions/#transitions">
     <link rel="help" href="http://www.w3.org/TR/css3-transitions/#animatable-properties">