return a.HealthCheck() == nil, nil
	})
	if err != nil {
		t.Fatalf("failed to initialize the authenticator: %v", err)
	}

	got, ok, err := a.AuthenticateToken(ctx, token)

	expectErr := len(c.wantErr) > 0

	if err != nil {
		if !expectErr {
			t.Fatalf("authenticate token: %v", err)
		}
		if got := err.Error(); c.wantErr != got {