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diff --git a/devtools/shared/tests/chrome/test_css-logic-getXPath.html b/devtools/shared/tests/chrome/test_css-logic-getXPath.html
new file mode 100644
index 0000000000..469e188cf0
--- /dev/null
+++ b/devtools/shared/tests/chrome/test_css-logic-getXPath.html
@@ -0,0 +1,95 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=987877
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 987877</title>
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
+  <script type="application/javascript">
+"use strict";
+
+const { require } = ChromeUtils.importESModule("resource://devtools/shared/loader/Loader.sys.mjs");
+const CssLogic = require("devtools/shared/inspector/css-logic");
+
+const _tests = [];
+function addTest(test) {
+  _tests.push(test);
+}
+
+function runNextTest() {
+  if (!_tests.length) {
+    SimpleTest.finish();
+    return;
+  }
+  _tests.shift()();
+}
+
+window.onload = function () {
+  SimpleTest.waitForExplicitFinish();
+  runNextTest();
+};
+
+addTest(function getXPathForUnattachedElement() {
+  const unattached = document.createElement("div");
+  unattached.id = "unattached";
+  is(CssLogic.getXPath(unattached), "", "Unattached node returns empty string");
+
+  const unattachedChild = document.createElement("div");
+  unattached.appendChild(unattachedChild);
+  is(CssLogic.getXPath(unattachedChild), "", "Unattached child returns empty string");
+
+  const unattachedBody = document.createElement("body");
+  is(CssLogic.getXPath(unattachedBody), "", "Unattached body returns empty string");
+
+  runNextTest();
+});
+
+addTest(function getXPath() {
+  const data = [{
+    // Target elements that have an ID get a short XPath.
+    selector: "#i-have-an-id",
+    path: "//*[@id=\"i-have-an-id\"]"
+  }, {
+    selector: "html",
+    path: "/html"
+  }, {
+    selector: "body",
+    path: "/html/body"
+  }, {
+    selector: "body > div:nth-child(2) > div > div:nth-child(4)",
+    path: "/html/body/div[2]/div/div[4]"
+  }, {
+    // XPath should support namespace.
+    selector: "namespace\\:body",
+    path: "/html/body/namespace:test/namespace:body"
+  }];
+
+  for (const {selector, path} of data) {
+    const node = document.querySelector(selector);
+    is(CssLogic.getXPath(node), path, `Full css path is correct for ${selector}`);
+  }
+
+  runNextTest();
+});
+  </script>
+</head>
+<body>
+  <div id="i-have-an-id">find me</div>
+  <div>
+    <div>
+      <div></div>
+      <div></div>
+      <div></div>
+      <div>me too!</div>
+    </div>
+  </div>
+  <namespace:test>
+    <namespace:header></namespace:header>
+    <namespace:body>and me</namespace:body>
+  </namespace:test>
+</body>
+</html>