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diff --git a/testing/web-platform/tests/html/semantics/document-metadata/the-base-element/base_href_unspecified.html b/testing/web-platform/tests/html/semantics/document-metadata/the-base-element/base_href_unspecified.html
new file mode 100644
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+++ b/testing/web-platform/tests/html/semantics/document-metadata/the-base-element/base_href_unspecified.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>HTML Test: base_href_unspecified</title>
+<link rel="author" title="Intel" href="http://www.intel.com/">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-base-element">
+<base id="base" target="_blank">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<div id="log"></div>
+<img id="test" src="/images/blue-100x100.png" style="display:none">
+
+<script>
+  var testElement,
+      baseElement;
+
+  setup(function () {
+    testElement = document.getElementById("test");
+    baseElement = document.getElementById("base");
+  });
+
+  test(function() {
+    assert_equals(baseElement.href, document.location.href, "Return the document base URL if the base element has no href content attribute.");
+  }, "The value of the href attribute must be the document's address if it is unspecified");
+
+  test(function() {
+    var exp = testElement.src.substring(0, testElement.src.lastIndexOf("/images/blue-100x100.png") + 1);
+    assert_true(baseElement.href.indexOf(exp) != -1, "The src attribute of the img element is incorrect.");
+  }, "The src attribute of the img element must relative to document's address");
+</script>