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diff --git a/devtools/client/inspector/test/browser_inspector_highlighter-eyedropper-label.js b/devtools/client/inspector/test/browser_inspector_highlighter-eyedropper-label.js
new file mode 100644
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+++ b/devtools/client/inspector/test/browser_inspector_highlighter-eyedropper-label.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+// Test the position of the eyedropper label.
+// It should move around when the eyedropper is close to the edges of the viewport so as
+// to always stay visible.
+
+const HIGHLIGHTER_TYPE = "EyeDropper";
+const ID = "eye-dropper-";
+
+const HTML = `
+<style>
+html, body {height: 100%; margin: 0;}
+body {background: linear-gradient(red, gold); display: flex; justify-content: center;
+      align-items: center;}
+</style>
+Eyedropper label position test
+`;
+const TEST_PAGE = "data:text/html;charset=utf-8," + encodeURI(HTML);
+
+const TEST_DATA = [{
+  desc: "Move the mouse to the center of the screen",
+  getCoordinates: (width, height) => {
+    return {x: width / 2, y: height / 2};
+  },
+  expectedPositions: {top: false, right: false, left: false}
+}, {
+  desc: "Move the mouse to the center left",
+  getCoordinates: (width, height) => {
+    return {x: 0, y: height / 2};
+  },
+  expectedPositions: {top: false, right: true, left: false}
+}, {
+  desc: "Move the mouse to the center right",
+  getCoordinates: (width, height) => {
+    return {x: width, y: height / 2};
+  },
+  expectedPositions: {top: false, right: false, left: true}
+}, {
+  desc: "Move the mouse to the bottom center",
+  getCoordinates: (width, height) => {
+    return {x: width / 2, y: height};
+  },
+  expectedPositions: {top: true, right: false, left: false}
+}, {
+  desc: "Move the mouse to the bottom left",
+  getCoordinates: (width, height) => {
+    return {x: 0, y: height};
+  },
+  expectedPositions: {top: true, right: true, left: false}
+}, {
+  desc: "Move the mouse to the bottom right",
+  getCoordinates: (width, height) => {
+    return {x: width, y: height};
+  },
+  expectedPositions: {top: true, right: false, left: true}
+}, {
+  desc: "Move the mouse to the top left",
+  getCoordinates: (width, height) => {
+    return {x: 0, y: 0};
+  },
+  expectedPositions: {top: false, right: true, left: false}
+}, {
+  desc: "Move the mouse to the top right",
+  getCoordinates: (width, height) => {
+    return {x: width, y: 0};
+  },
+  expectedPositions: {top: false, right: false, left: true}
+}];
+
+add_task(function* () {
+  let {inspector, testActor} = yield openInspectorForURL(TEST_PAGE);
+  let helper = yield getHighlighterHelperFor(HIGHLIGHTER_TYPE)({inspector, testActor});
+  helper.prefix = ID;
+
+  let {mouse, show, hide, finalize} = helper;
+  let {width, height} = yield testActor.getBoundingClientRect("html");
+
+  // This test fails in non-e10s windows if we use width and height. For some reasons, the
+  // mouse events can't be dispatched/handled properly when we try to move the eyedropper
+  // to the far right and/or bottom of the screen. So just removing 10px from each side
+  // fixes it.
+  width -= 10;
+  height -= 10;
+
+  info("Show the eyedropper on the page");
+  yield show("html");
+
+  info("Move the eyedropper around and check that the label appears at the right place");
+  for (let {desc, getCoordinates, expectedPositions} of TEST_DATA) {
+    info(desc);
+    let {x, y} = getCoordinates(width, height);
+    info(`Moving the mouse to ${x} ${y}`);
+    yield mouse.move(x, y);
+    yield checkLabelPositionAttributes(helper, expectedPositions);
+  }
+
+  info("Hide the eyedropper");
+  yield hide();
+  finalize();
+});
+
+function* checkLabelPositionAttributes(helper, positions) {
+  for (let position in positions) {
+    is((yield hasAttribute(helper, position)), positions[position],
+       `The label was ${positions[position] ? "" : "not "}moved to the ${position}`);
+  }
+}
+
+function* hasAttribute({getElementAttribute}, name) {
+  let value = yield getElementAttribute("root", name);
+  return value !== null;
+}