diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ad40bb66..c7ab5f7d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -129,6 +129,8 @@ yarn integration-test test:android
 yarn integration-test test:ios
 ```
 
+To set the license key to be used for the tests, you can set the key `"licenseKey"` in `integration_test/app.json`.
+
 See available API for testing [here](/integration_test/playertesting/PlayerTesting.ts).
 
 ### Adding new tests
diff --git a/integration_test/README.md b/integration_test/README.md
index ea2bffdc..fd12cf6a 100644
--- a/integration_test/README.md
+++ b/integration_test/README.md
@@ -28,4 +28,6 @@ Hint: You can provide a specific iOS simulator by name when using `--simulator`
 yarn example ios --simulator="iPhone 14 Pro"
 ```
 
+To set the license key to be used for the tests, you can set the key `"licenseKey"` in `integration_test/app.json`.
+
 Note: The tests are currently only supported on iOS simulators and Android emulators. Running them on real devices is not supported at the moment.
diff --git a/integration_test/playertesting/PlayerTestWorld.ts b/integration_test/playertesting/PlayerTestWorld.ts
index a5b77660..6005bbdd 100644
--- a/integration_test/playertesting/PlayerTestWorld.ts
+++ b/integration_test/playertesting/PlayerTestWorld.ts
@@ -72,10 +72,15 @@ export default class PlayerTestWorld {
     player.initialize();
     this.player = player;
 
+    // Trick to wait for the player to be initialized
+    // otherwise initial events might be missed
+    await player.isPlaying();
+
     await fn().finally(() => {
       player.destroy();
       this.isFinished_ = true;
       this.player = undefined;
+      this.eventListeners = {};
     });
   };
 
diff --git a/integration_test/playertesting/PlayerTesting.ts b/integration_test/playertesting/PlayerTesting.ts
index 74c13a70..c20cce83 100644
--- a/integration_test/playertesting/PlayerTesting.ts
+++ b/integration_test/playertesting/PlayerTesting.ts
@@ -126,8 +126,8 @@ export const expectEvents = async (
  * @see {@link Player}
  * @see {@link EventType}
  */
-export const callPlayerAndExpectEvent = async <E extends Event, P>(
-  fn: (player: Player) => Promise<P>,
+export const callPlayerAndExpectEvent = async <E extends Event>(
+  fn: (player: Player) => void,
   expectationConvertible: SingleEventExpectation | EventType,
   timeoutSeconds: number = 10
 ): Promise<E> => {
diff --git a/integration_test/tests/helper/Sources.ts b/integration_test/tests/helper/Sources.ts
new file mode 100644
index 00000000..e969b9d9
--- /dev/null
+++ b/integration_test/tests/helper/Sources.ts
@@ -0,0 +1,13 @@
+import { SourceConfig, SourceType } from 'bitmovin-player-react-native';
+
+export const Sources = {
+  artOfMotionHls: {
+    url: 'https://bitmovin-a.akamaihd.net/content/MI201109210084_1/m3u8s/f08e80da-bf1d-4e3d-8899-f0f6155f6efa.m3u8',
+    type: SourceType.HLS,
+  } as SourceConfig,
+
+  artOfMotionDash: {
+    url: 'https://bitmovin-a.akamaihd.net/content/MI201109210084_1/mpds/f08e80da-bf1d-4e3d-8899-f0f6155f6efa.mpd',
+    type: SourceType.DASH,
+  } as SourceConfig,
+};