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diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.html b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.html
new file mode 100644
index 0000000000..3df660ea3e
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.drawing.style.wordSpacing.change.font.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.text.drawing.style.wordSpacing.change.font</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.text.drawing.style.wordSpacing.change.font</h1>
+<p class="desc">Set word spacing and word spacing to font dependent value and verify it works after font change.</p>
+
+
+<script>
+var t = async_test("Set word spacing and word spacing to font dependent value and verify it works after font change.");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+    throw reason;
+});
+t.step(function() {
+
+  var canvas = new OffscreenCanvas(100, 50);
+  var ctx = canvas.getContext('2d');
+
+  _assertSame(ctx.letterSpacing, '0px', "ctx.letterSpacing", "'0px'");
+  _assertSame(ctx.wordSpacing, '0px', "ctx.wordSpacing", "'0px'");
+  // Get the width for 'Hello World, again' at default size, 10px.
+  var width_normal = ctx.measureText('Hello World, again').width;
+
+  ctx.wordSpacing = '1em';
+  _assertSame(ctx.wordSpacing, '1em', "ctx.wordSpacing", "'1em'");
+  // 1em = 10px. Add 10px after each word in "Hello World, again",
+  // makes it 20px longer.
+  var width_with_spacing = ctx.measureText('Hello World, again').width;
+  _assertSame(width_with_spacing, width_normal + 20, "width_with_spacing", "width_normal + 20");
+
+  // Changing font to 20px. Without resetting the spacing, 1em wordSpacing
+  // is now 20px, so it's suppose to be 40px longer without any wordSpacing set.
+  ctx.font = '20px serif';
+  width_with_spacing = ctx.measureText('Hello World, again').width;
+  // Now calculate the reference spacing for "Hello World, again" with no spacing.
+  ctx.wordSpacing = '0em';
+  width_normal = ctx.measureText('Hello World, again').width;
+  _assertSame(width_with_spacing, width_normal + 40, "width_with_spacing", "width_normal + 40");
+  t.done();
+
+});
+</script>