Merge "Mock open and refit function for gr-overlay"
diff --git a/README.md b/README.md
index 41f6dfd..5ac6c4e 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,8 @@
 After `bower install`, running `polymer test -l chrome` will run all tests in Chrome, and running `polymer serve`
 and navigating to http://127.0.0.1:8081/components/checks/gr-checks/gr-checks-view_test.html allows for manual debugging.
 
+The test file should be added to test/index.html if it needs to be run via `polymer test`.
+
 When upgrading the plugin, please use init:
 
     java -jar gerrit.war init -d site_path
diff --git a/gr-checks/gr-checks-view.js b/gr-checks/gr-checks-view.js
index f27eb11..5f4a11f 100644
--- a/gr-checks/gr-checks-view.js
+++ b/gr-checks/gr-checks-view.js
@@ -165,6 +165,7 @@
     },
 
     _handleRevisionUpdate(revision) {
+      if (!revision) return;
       this._currentPatchSet = revision._number;
     },
 
diff --git a/test/index.html b/test/index.html
index f132465..fa9b923 100644
--- a/test/index.html
+++ b/test/index.html
@@ -30,5 +30,6 @@
     '../gr-checks/gr-checks-item_test.html',
     '../gr-checks/gr-checks-status_test.html',
     '../gr-checks/gr-checks-view_test.html',
+    '../gr-checks/gr-checkers-list_test.html'
   ]);
 </script>
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