> --- FAIL: TestTokenSource (0.00s) > panic: cannot handle unexported field at {*google.Credentials}.universeDomain: > "golang.org/x/oauth2/google".Credentials
This is fixed upstream https://github.com/googleapis/google-api-go-client/commit/b3a71bda027d9ff92df3bf76b5ee9ffa55520dd9 so hopefully updating the package would fix the problem