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diff --git a/devtools/client/inspector/computed/test/browser_computed_keybindings_02.js b/devtools/client/inspector/computed/test/browser_computed_keybindings_02.js
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+++ b/devtools/client/inspector/computed/test/browser_computed_keybindings_02.js
@@ -0,0 +1,69 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests the computed-view keyboard navigation.
+
+const TEST_URI = `
+  <style type="text/css">
+    span {
+      font-variant: small-caps;
+      color: #000000;
+    }
+    .nomatches {
+      color: #ff0000;
+    }
+  </style>
+  <div id="first" style="margin: 10em;
+    font-size: 14pt; font-family: helvetica, sans-serif; color: #AAA">
+    <h1>Some header text</h1>
+    <p id="salutation" style="font-size: 12pt">hi.</p>
+    <p id="body" style="font-size: 12pt">I am a test-case. This text exists
+    solely to provide some things to <span style="color: yellow">
+    highlight</span> and <span style="font-weight: bold">count</span>
+    style list-items in the box at right. If you are reading this,
+    you should go do something else instead. Maybe read a book. Or better
+    yet, write some test-cases for another bit of code.
+    <span style="font-style: italic">some text</span></p>
+    <p id="closing">more text</p>
+    <p>even more text</p>
+  </div>
+`;
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { inspector, view } = await openComputedView();
+  await selectNode("span", inspector);
+
+  info("Selecting the first computed style in the list");
+  const firstStyle = view.styleDocument.querySelector(
+    "#computed-container .computed-property-view"
+  );
+  ok(firstStyle, "First computed style found in panel");
+  firstStyle.focus();
+
+  info("Tab to select the 2nd style and press return");
+  let onExpanded = inspector.once("computed-view-property-expanded");
+  EventUtils.synthesizeKey("KEY_Tab");
+  EventUtils.synthesizeKey("KEY_Enter");
+  await onExpanded;
+
+  info("Verify the 2nd style has been expanded");
+  const secondStyleSelectors = view.styleDocument.querySelectorAll(
+    ".computed-property-content .matchedselectors"
+  )[1];
+  ok(!!secondStyleSelectors.childNodes.length, "Matched selectors expanded");
+
+  info("Tab back up and test the same thing, with space");
+  onExpanded = inspector.once("computed-view-property-expanded");
+  EventUtils.synthesizeKey("KEY_Tab", { shiftKey: true });
+  EventUtils.synthesizeKey(" ");
+  await onExpanded;
+
+  info("Verify the 1st style has been expanded too");
+  const firstStyleSelectors = view.styleDocument.querySelectorAll(
+    ".computed-property-content .matchedselectors"
+  )[0];
+  ok(!!firstStyleSelectors.childNodes.length, "Matched selectors expanded");
+});