diff --git a/polygerrit-ui/app/behaviors/gr-path-list-behavior/gr-path-list-behavior_test.html b/polygerrit-ui/app/behaviors/gr-path-list-behavior/gr-path-list-behavior_test.html
index 530b7be0fd..adf0bf1889 100644
--- a/polygerrit-ui/app/behaviors/gr-path-list-behavior/gr-path-list-behavior_test.html
+++ b/polygerrit-ui/app/behaviors/gr-path-list-behavior/gr-path-list-behavior_test.html
@@ -13,6 +13,8 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 -->
+<!-- Polymer included for the html import polyfill. -->
+<script src="../../../bower_components/webcomponentsjs/webcomponents.min.js"></script>
 <script src="../../bower_components/web-component-tester/browser.js"></script>
 <title>gr-path-list-behavior</title>