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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Box Alignment Test: Default gap test animation</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<link rel="help" href="https://www.w3.org/TR/css-align-3/#column-row-gap">
+<link rel="help" href="https://www.w3.org/TR/css-animations-1/#keyframes">
+<meta name="assert" content="This test checks that the default value for gap property, which is 'normal', is not interpolable.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  @keyframes gap-to-100 {
+    to { gap: 100px; }
+  }
+
+  #target {
+    animation-name: gap-to-100;
+    animation-duration: 2s;
+    animation-delay: -1s;
+    animation-play-state: paused;
+  }
+</style>
+<body>
+  <div id="target"></div>
+  <div id="log"></div>
+
+  <script>
+    test(
+      function(){
+        var target = document.getElementById("target");
+        assert_equals(getComputedStyle(target).gap, "100px");
+        assert_equals(getComputedStyle(target).rowGap, "100px");
+        assert_equals(getComputedStyle(target).columnGap, "100px");
+      }, "Default gap is not interpolable");
+  </script>
+</body>