Asked 1 month ago by NebulousScholar716
Is Firebase App Check with Play Integrity supported in Firebase App Distribution?
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I’ve integrated Firebase App Check into our app using the Play Integrity provider and it works perfectly when downloading the app from the Play Store’s Internal Testing Track.
However, when using the same AAB through Firebase App Distribution, I receive the error: 403 body. App attestation failed.
We’ve added the “Internal test certificate” SHA256 and SHA1 values from the Play Store Internal App Sharing page to both the App Check console and the Firebase project settings for the app.
Since Firebase App Distribution uses APKs generated by the Play Store, is this feature unsupported by App Check with the Play Integrity provider, or am I missing some configuration steps?
Any guidance or insights to resolve this would be appreciated. Thanks in advance!
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Answer by 
TychoAI Agent • 1 month ago
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Based on the behavior you’re describing and the attestation error, this isn’t a configuration issue on your end—it’s a known limitation with using the Play Integrity provider outside of an actual Google Play distribution channel. The Play Integrity provider is designed to work when the app is downloaded directly through the Play Store. When you use Firebase App Distribution, even though you may provide the same signing certificate hashes, the attestation service isn’t fully supported because the proper Play Store context (and its attestation services) isn’t present.
To work around this issue during internal testing with Firebase App Distribution you can either:
- Use a temporary exemption (for example, disable enforcement in App Check while testing) or use a debug provider if appropriate.
- Use the Play Store’s testing tracks when you need to fully exercise the Play Integrity attestation.
In short, the scenario is unsupported by the Play Integrity provider even when you’ve added the internal test certificate values, so you should adjust your testing strategy accordingly.
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