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+++ b/testing/web-platform/tests/css/css-text/text-align/text-align-last-interpolation.html
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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>text-align-last interpolation</title>
+    <link rel="author" title="Kiet Ho" href="mailto:tho22@apple.com">
+    <link rel="help" href="https://drafts.csswg.org/css-text/#text-align-last-property">
+    <meta name="assert" content="text-align-last supports discrete animation">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/css/support/interpolation-testcommon.js"></script>
+  </head>
+  <body>
+    <script>
+      test_no_interpolation({
+        property: 'text-align-last',
+        from: 'auto',
+        to: 'start'
+      });
+
+      test_no_interpolation({
+        property: 'text-align-last',
+        from: 'justify',
+        to: 'center'
+      });
+
+      test_no_interpolation({
+        property: 'text-align-last',
+        from: 'left',
+        to: 'right'
+      });
+
+      test_no_interpolation({
+        property: 'text-align-last',
+        from: 'end',
+        to: 'match-parent'
+      });
+    </script>
+  </body>
+</html>