1 files changed, 13 insertions, 0 deletions
diff --git a/browser/base/content/test/webextensions/browser_permissions_mozAddonManager.js b/browser/base/content/test/webextensions/browser_permissions_mozAddonManager.js
index 55a578221d..d54038bffe 100644
--- a/browser/base/content/test/webextensions/browser_permissions_mozAddonManager.js
+++ b/browser/base/content/test/webextensions/browser_permissions_mozAddonManager.js
@@ -9,6 +9,17 @@ async function installMozAM(filename) {
   );
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      // This test asserts that the extension icon is in the install dialog
+      // and so it requires the signature checks to be enabled (otherwise the
+      // extension icon is expected to be replaced by a warning icon) and the
+      // two test extension used by this test (browser_webext_nopermissions.xpi
+      // and browser_webext_permissions.xpi) are signed using AMO stage signatures.
+      ["xpinstall.signatures.dev-root", true],
+    ],
+  });
+
   await SpecialPowers.spawn(
     gBrowser.selectedBrowser,
     [`${BASE}/${filename}`],
@@ -16,6 +27,8 @@ async function installMozAM(filename) {
       await content.wrappedJSObject.installMozAM(url);
     }
   );
+
+  await SpecialPowers.popPrefEnv();
 }
 
 add_task(() => testInstallMethod(installMozAM, "installAmo"));