diff --git a/src/test/kotlin/software/tice/wallet/attestation/services/WalletApiServiceTests.kt b/src/test/kotlin/software/tice/wallet/attestation/services/WalletApiServiceTests.kt
index aac5310..a38e0d2 100644
--- a/src/test/kotlin/software/tice/wallet/attestation/services/WalletApiServiceTests.kt
+++ b/src/test/kotlin/software/tice/wallet/attestation/services/WalletApiServiceTests.kt
@@ -3,13 +3,8 @@ package software.tice.wallet.attestation.services
 import io.jsonwebtoken.Jwts
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
-import org.junit.jupiter.api.extension.ExtendWith
 import org.mockito.*
 import org.mockito.Mockito.verify
-import org.mockito.junit.jupiter.MockitoExtension
-import org.springframework.boot.test.context.SpringBootTest
-import org.springframework.boot.test.mock.mockito.MockBean
-import org.springframework.test.context.ContextConfiguration
 import software.tice.wallet.attestation.repositories.UserEntity
 import software.tice.wallet.attestation.repositories.UserRepository
 import software.tice.wallet.attestation.requests.AttestationRequest
@@ -17,14 +12,14 @@ import java.security.KeyPair
 import java.util.*
 import kotlin.test.assertEquals
 
-@SpringBootTest
-@ExtendWith(MockitoExtension::class)
-@ContextConfiguration(classes = [UserRepository::class])
-class WalletApiServiceTests {
 
-    @MockBean
+internal class WalletApiServiceTests {
+
+    @Mock
     private lateinit var userRepository: UserRepository
 
+    private lateinit var privateKey: String
+
     private lateinit var walletApiService: WalletApiService
 
     @Captor
@@ -35,7 +30,8 @@ class WalletApiServiceTests {
 
     @BeforeEach
     fun setup() {
-        val privateKey = Base64.getEncoder().encodeToString(keyPair.private.encoded)
+        MockitoAnnotations.openMocks(this)
+        privateKey = Base64.getEncoder().encodeToString(keyPair.private.encoded)
         walletApiService = WalletApiService(privateKey, userRepository)
     }