Allow Push Notifications in your App

Open your app on your real device (Simulator probably won't work), and go to Settings > Notifications. Press Allow.

Mark yourself as a Test User

In OneSignal Dashboard (opens in a new tab) go to App Name > Audience > Subscriptions.

After you have allowed push notifications on your device, you should see your device listed here.

Press on the three dots and press on Add to Test Subscriptions.

Enter "TestUser" and press Add.

Send a Push Notification in OneSignal

In OneSignal Dashboard (opens in a new tab) go to App Name > Messages > Push and press on New Message. Select New Push.

Fill in the Notification Title, Notification Description and press Send Test Push.

Here, you can select TestUser and press Send.

If everything is set up correctly, you should receive a push notification on your device. Hooray! 🎉