diff --git a/app/components/Views/BrowserTab/index.js b/app/components/Views/BrowserTab/index.js
index f63a6f53f34..2132c32c7de 100644
--- a/app/components/Views/BrowserTab/index.js
+++ b/app/components/Views/BrowserTab/index.js
@@ -110,7 +110,7 @@ import trackErrorAsAnalytics from '../../../util/metrics/TrackError/trackErrorAs
 import { selectPermissionControllerState } from '../../../selectors/snaps/permissionController';
 import { useIsFocused } from '@react-navigation/native';
 import handleWebViewFocus from '../../../util/browser/webViewFocus';
-import { isTest } from '../../../util/test/utils.js';
+import { isTest } from '../../../util/test/utils.ts';
 import { EXTERNAL_LINK_TYPE } from '../../../constants/browser';
 
 const { HOMEPAGE_URL, NOTIFICATION_NAMES } = AppConstants;
diff --git a/app/util/test/utils.js b/app/util/test/utils.ts
similarity index 82%
rename from app/util/test/utils.js
rename to app/util/test/utils.ts
index a66a7bdd4b3..eaaa0522ce0 100644
--- a/app/util/test/utils.js
+++ b/app/util/test/utils.ts
@@ -3,7 +3,11 @@ export const flushPromises = () => new Promise(setImmediate);
 export const FIXTURE_SERVER_PORT = 12345;
 
 // E2E test configuration required in app
-export const testConfig = {};
+interface TestConfig {
+  fixtureServerPort?: number;
+}
+
+export const testConfig: TestConfig = {};
 
 /**
  * TODO: Update this condition once we change E2E builds to use release instead of debug
diff --git a/index.js b/index.js
index ece1f59ea50..294dff20908 100644
--- a/index.js
+++ b/index.js
@@ -17,7 +17,7 @@ setupSentry();
 import { AppRegistry, LogBox } from 'react-native';
 import Root from './app/components/Views/Root';
 import { name } from './app.json';
-import { isTest } from './app/util/test/utils.js';
+import { isTest } from './app/util/test/utils.ts';
 
 
 import { Performance } from './app/core/Performance';
diff --git a/shim.js b/shim.js
index ec6b99e4e6e..10cc5d9c0c8 100644
--- a/shim.js
+++ b/shim.js
@@ -5,7 +5,7 @@ import {
   FIXTURE_SERVER_PORT,
   isTest,
   testConfig,
-} from './app/util/test/utils.js';
+} from './app/util/test/utils.ts';
 import { LaunchArguments } from 'react-native-launch-arguments';
 import { defaultMockPort } from './e2e/mockServer/mockUrlCollection';