diff --git a/pkg/oidc/token.go b/pkg/oidc/token.go
index 1d49f26..21b0419 100644
--- a/pkg/oidc/token.go
+++ b/pkg/oidc/token.go
@@ -78,14 +78,14 @@ func NewJWTProfileAssertionFromKeyJSON(filename string, audience []string) (*JWT
 	}
 	keyData := new(struct {
 		KeyID  string `json:"keyId"`
-		Key    []byte `json:"key"`
+		Key    string `json:"key"`
 		UserID string `json:"userId"`
 	})
 	err = json.Unmarshal(data, keyData)
 	if err != nil {
 		return nil, err
 	}
-	return NewJWTProfileAssertion(keyData.UserID, keyData.KeyID, audience, keyData.Key), nil
+	return NewJWTProfileAssertion(keyData.UserID, keyData.KeyID, audience, []byte(keyData.Key)), nil
 }
 
 func NewJWTProfileAssertion(userID, keyID string, audience []string, key []byte) *JWTProfileAssertion {
diff --git a/pkg/rp/tockenexchange_test.go b/pkg/rp/tockenexchange_test.go
deleted file mode 100644
index d84eb88..0000000
--- a/pkg/rp/tockenexchange_test.go
+++ /dev/null
@@ -1,72 +0,0 @@
-package rp
-
-import (
-	"testing"
-
-	"github.com/caos/oidc/pkg/oidc"
-)
-
-func TestGenerateJWTProfileToken(t *testing.T) {
-	type args struct {
-		assertion *oidc.JWTProfileAssertion
-	}
-	type res struct {
-		wantErr bool
-		// token   string
-	}
-	tests := []struct {
-		name string
-		args args
-		res  res
-	}{
-		{
-			name: "valid",
-			args: args{
-				assertion: oidc.NewJWTProfileAssertion("service-account-id", "key-id", []string{"http://localhost:50002/oauth/v2/"}, []byte(`-----BEGIN RSA PRIVATE KEY-----
-MIIEowIBAAKCAQEAsqxKigKty6jBIuDtO9AIGdTNo0VMe/QoYlHPxDQtgKhdXjD7
-GNVLlr4qy+28Slo/Nph5/UFIc6BhXUGCK0JSRDoXukB36UnZblT/xyjz9NLzAEsk
-HKCBhkJL7uuSRDvj9L367/02QhSzYh00vi6sG+d4cUuD3n4oZwf0IifZy4OJBX2R
-SX2sV8Lh3eR39UrnA2qiwRPQmToVPu1x18BphvE9kZtVzTvy/d0VXtEcNJDvYNuH
-kYM3DLzzR0+DCDS8bo7IaX8i1TQoO8y5rXlZ5C7+FdAa15lt5N+A0Lfz7hu45s+r
-OCcp2s6IvsRZKV4HWhEhnQuoRdXQmpnQGlFnFQIDAQABAoIBABY41YB6utDkqTjE
-Tt0sj4Ve8UCIQu37vPYVhMi7UJl61zn6z5AUHzWda0c3xz5cIRaSOkHkV7WB0fo+
-RolI02CG9SKGGCPcun09dx53GnhtsCluLwycbd+b6UPK6sMvy7dJ1ab5kEEBwBnI
-1iF9Poyt6k30/W6ztCS0WYnR+QWVnhtMPBRtzeSAb8OdKRQsNRKWgN+BK7VzCFls
-jr4tvwdq/5WWLmYYqeteVK8nt9muJGUdmqS8UBf0D1Qo2/Ob+UKIE3ff/VlaEW+g
-YhVkKspUYkuOWERk4awEkExZ0zoTkEKv4BgL53a41KO3UV8GIkSW8W8SfIL1aIEt
-aPvm6XUCgYEA57HtG2GWJIozBbBlxT1UC2I0hFW37+JETx7ingcsjNxobQZftWZc
-36PwZ4kmLxLJIinuFdEK7ghfm4123PUaKxH4gNXMzO7rzF2pskD902uaDijpkd1c
-asXSIzy7MnG2ipEmxbqD3wPa7Lm9RCwl1ldCfOkZpkilsgBEAkWGtosCgYEAxWp7
-F4GlcI1S6/lUdxDeem5QTEYLuE45prQhT0jiFzxDT3kuX4mK/4A7wryPif+UCksf
-U5cbo65l+IYc3JUx2DtZARHALdg7BHiaYqsx3qWVM0OokwEstbSrLT6+jSolegSf
-+9LghTS5ZowkighyiW5OsJMIehuHowdSH9NZrN8CgYA6XHsZNo+XTKhlenVoJXaS
-F36bBux6JEiIlYMHw07ZfHthWwWor8wdGTJpIgbYPKclT+KE5E8Yfkt25z9VkPey
-eaha63/W7ye+JqmkGPLW2nfHsU6ES3oH+yRfc+DDaBlO9hkKHV0yQ8pVbsPZ9DTj
-tL8ur5iiZhI2sBJxcAnq2QKBgQC4DnTBD8DdVQXQuF9Fu1aRszPuSQg4R8Z8ZEkC
-EKOqoibne8X+kNAlMruE7iSttrmhdzS3zJSaYMj1kqRqDDeysHJlCtWwaH9txbu6
-7n3KZXrbluMeW+QBbXaC8pLaLkdOoe0+7fciemu47kRK5WFUPKHlAtDOd8hX+UVa
-IsTi5QKBgCCfYiuTdesjMKAc3UQ0zjVYAxS1HqJh7V5McqscFx3D3uxg1JJcojwc
-QOsG4gLgcCbr3kBkQLDHC+ZTjKgJ7OTVUf6To5yz2WlrDL+0YN+TmA8fpQR/rL2y
-VgGFLpjDn3JtxGFwhV2CCwrC/ZCSut2L8IGi5+KtwMUW8clN9skR
------END RSA PRIVATE KEY-----
-`)),
-			},
-			res: res{
-				wantErr: false,
-				// token:   "eyJhbGciOiJSUzI1NiIsImtpZCI6ImtleS1pZCJ9.eyJpc3MiOiJzZXJ2aWNlLWFjY291bnQtaWQiLCJzdWIiOiJzZXJ2aWNlLWFjY291bnQtaWQiLCJhdWQiOlsiaHR0cDovL2xvY2FsaG9zdDo1MDAwMi9vYXV0aC92Mi8iXSwiZXhwIjoxNjAwMjYxNDQyLCJpYXQiOjE2MDAyNTc4NDIsInNjb3BlIjoib3BlbmlkIn0.c9w4al8NfWboMbp9U4j34SnMFei_RH7ajowE-B6GT0mTZRoSRR5lldti6aFObbyraYbpEbTmrH3LalSVTeQwkD0tRKMll3pNyHZ0OtsZQEVLKLtFZG5F3lmB5sbuRLkIRmh7lRad1o9NR2PVqCMJjbBqPRaUADhUaWnY5oTHt5xdt_T--VJfo871TG_Hcp8J-uAvyDqzccX6jrx4jG0t_q1ps1EUwkdzILb_ezv3PTb3YF9sj1lNuDs4dOJGKjBJNdHvhO_ofNMfb6wewmXF5hzZgO72PC7h1Pr__xRcuemO4VIpC1lb24lyYbM1Yg3m5z_e0ByU4dI0ePh-FPBsWQ",
-			},
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			_, err := generateJWTProfileToken(tt.args.assertion)
-			if (err != nil) != tt.res.wantErr {
-				t.Errorf("generateJWTProfileToken() error = %v, wantErr %v", err, tt.res.wantErr)
-				return
-			}
-			// if !reflect.DeepEqual(got, tt.res.token) {
-			// 	t.Errorf("generateJWTProfileToken() = %q, want %q", got, tt.res.token)
-			// }
-		})
-	}
-}