diff --git a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTest.kt b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTest.kt
index 606f57b467..eb8b8b9730 100644
--- a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTest.kt
+++ b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTest.kt
@@ -264,7 +264,7 @@ class KeysBackupTest : InstrumentedTest {
         assertNotNull(decryption)
         // - Check decryptKeyBackupData() returns stg
         val sessionData = keysBackup
-                .decryptKeyBackupData(keyBackupData!!,
+                .decryptKeyBackupData(keyBackupData,
                         session.olmInboundGroupSession!!.sessionIdentifier(),
                         cryptoTestData.roomId,
                         decryption!!)
diff --git a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTestHelper.kt b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTestHelper.kt
index 944d1036d3..b6e5ae7364 100644
--- a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTestHelper.kt
+++ b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTestHelper.kt
@@ -111,7 +111,7 @@ class KeysBackupTestHelper(
         Assert.assertTrue(keysBackup.isEnabled)
 
         stateObserver.stopAndCheckStates(null)
-        return PrepareKeysBackupDataResult(megolmBackupCreationInfo, keysVersion.version!!)
+        return PrepareKeysBackupDataResult(megolmBackupCreationInfo, keysVersion.version)
     }
 
     /**