diff --git a/test/fixtures/runtime-messaging-extension/background.js b/test/fixtures/runtime-messaging-extension/background.js
index db8d4d2..f6bb3da 100644
--- a/test/fixtures/runtime-messaging-extension/background.js
+++ b/test/fixtures/runtime-messaging-extension/background.js
@@ -5,6 +5,12 @@ console.log(name, "background page loaded");
 browser.runtime.onMessage.addListener((msg, sender) => {
   console.log(name, "background received msg", {msg, sender});
 
+  try {
+    browser.pageAction.show(sender.tab.id);
+  } catch (err) {
+    return Promise.resolve(`Unexpected error on pageAction.show: ${err}`);
+  }
+
   return Promise.resolve("background page reply");
 });
 
diff --git a/test/fixtures/runtime-messaging-extension/manifest.json b/test/fixtures/runtime-messaging-extension/manifest.json
index 084a423..e4d5aea 100644
--- a/test/fixtures/runtime-messaging-extension/manifest.json
+++ b/test/fixtures/runtime-messaging-extension/manifest.json
@@ -20,5 +20,8 @@
       "browser-polyfill.js",
       "background.js"
     ]
+  },
+  "page_action": {
+    "default_title": "a page action"
   }
 }