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diff --git a/testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/toBlob.null.html b/testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/toBlob.null.html
new file mode 100644
index 0000000000..11368a169c
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/toBlob.null.html
@@ -0,0 +1,33 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Canvas test: toBlob.null</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
+<body class="show_output">
+
+<h1>toBlob.null</h1>
+<p class="desc">toBlob with zero dimension returns a null Blob</p>
+
+<p class="output">Actual output:</p>
+<canvas id="c" class="output" width="100" height="0"><p class="fallback">FAIL (fallback content)</p></canvas>
+
+<ul id="d"></ul>
+<script>
+async_test(function() {
+    on_event(window, "load", this.step_func(function() {
+         var toBlobCalled = false;
+         c.toBlob(this.step_func(function(blob) {
+           toBlobCalled = true;
+           _assertSame(blob, null, "blob", "null");
+           c.width = 0;
+           c.height = 100;
+           c.toBlob(this.step_func_done(function(blob) {
+             _assertSame(blob, null, "blob", "null");
+           }), 'image/jpeg');
+         }), 'image/jpeg');
+         assert_false(toBlobCalled, "toBlob callback shouldn't be called synchronously");
+    }));
+}, "toBlob with zero dimension returns a null Blob");
+</script>