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diff --git a/devtools/client/inspector/test/browser_inspector_search-02.js b/devtools/client/inspector/test/browser_inspector_search-02.js
new file mode 100644
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+++ b/devtools/client/inspector/test/browser_inspector_search-02.js
@@ -0,0 +1,155 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Testing that searching for combining selectors using the inspector search
+// field produces correct suggestions.
+
+const TEST_URL = URL_ROOT + "doc_inspector_search-suggestions.html";
+
+// An array of (key, suggestions) pairs where key is a key to press and
+// suggestions is an array of suggestions that should be shown in the popup.
+// Suggestion is an object with label of the entry and optional count
+// (defaults to 1)
+const TEST_DATA = [
+  {
+    key: "d",
+    suggestions: [{ label: "div" }, { label: "#d1" }, { label: "#d2" }],
+  },
+  {
+    key: "i",
+    suggestions: [{ label: "div" }],
+  },
+  {
+    key: "v",
+    suggestions: [],
+  },
+  {
+    key: " ",
+    suggestions: [{ label: "div div" }, { label: "div span" }],
+  },
+  {
+    key: ">",
+    suggestions: [{ label: "div >div" }, { label: "div >span" }],
+  },
+  {
+    key: "VK_BACK_SPACE",
+    suggestions: [{ label: "div div" }, { label: "div span" }],
+  },
+  {
+    key: "+",
+    suggestions: [{ label: "div +span" }],
+  },
+  {
+    key: "VK_BACK_SPACE",
+    suggestions: [{ label: "div div" }, { label: "div span" }],
+  },
+  {
+    key: "VK_BACK_SPACE",
+    suggestions: [],
+  },
+  {
+    key: "VK_BACK_SPACE",
+    suggestions: [{ label: "div" }],
+  },
+  {
+    key: "VK_BACK_SPACE",
+    suggestions: [{ label: "div" }, { label: "#d1" }, { label: "#d2" }],
+  },
+  {
+    key: "VK_BACK_SPACE",
+    suggestions: [],
+  },
+  {
+    key: "p",
+    suggestions: [
+      { label: "p" },
+      { label: "#p1" },
+      { label: "#p2" },
+      { label: "#p3" },
+    ],
+  },
+  {
+    key: " ",
+    suggestions: [{ label: "p strong" }],
+  },
+  {
+    key: "+",
+    suggestions: [{ label: "p +button" }, { label: "p +p" }],
+  },
+  {
+    key: "b",
+    suggestions: [{ label: "p +button" }],
+  },
+  {
+    key: "u",
+    suggestions: [{ label: "p +button" }],
+  },
+  {
+    key: "t",
+    suggestions: [{ label: "p +button" }],
+  },
+  {
+    key: "t",
+    suggestions: [{ label: "p +button" }],
+  },
+  {
+    key: "o",
+    suggestions: [{ label: "p +button" }],
+  },
+  {
+    key: "n",
+    suggestions: [],
+  },
+  {
+    key: "+",
+    suggestions: [{ label: "p +button+p" }],
+  },
+];
+
+add_task(async function () {
+  const { inspector } = await openInspectorForURL(TEST_URL);
+  const searchBox = inspector.searchBox;
+  const popup = inspector.searchSuggestions.searchPopup;
+
+  await focusSearchBoxUsingShortcut(inspector.panelWin);
+
+  for (const { key, suggestions } of TEST_DATA) {
+    info("Pressing " + key + " to get " + formatSuggestions(suggestions));
+
+    const command = once(searchBox, "input");
+    const onSearchProcessingDone =
+      inspector.searchSuggestions.once("processing-done");
+    EventUtils.synthesizeKey(key, {}, inspector.panelWin);
+    await command;
+
+    info("Waiting for search query to complete");
+    await onSearchProcessingDone;
+
+    info(
+      "Query completed. Performing checks for input '" +
+        searchBox.value +
+        "' - key pressed: " +
+        key
+    );
+    const actualSuggestions = popup.getItems();
+
+    is(
+      popup.isOpen ? actualSuggestions.length : 0,
+      suggestions.length,
+      "There are expected number of suggestions."
+    );
+
+    for (let i = 0; i < suggestions.length; i++) {
+      is(
+        actualSuggestions[i].label,
+        suggestions[i].label,
+        "The suggestion at " + i + "th index is correct."
+      );
+    }
+  }
+});
+
+function formatSuggestions(suggestions) {
+  return "[" + suggestions.map(s => "'" + s.label + "'").join(", ") + "]";
+}