diff --git a/monkey/tests/unit_tests/monkey_island/cc/repository/test_mongo_credentials_repository.py b/monkey/tests/unit_tests/monkey_island/cc/repository/test_mongo_credentials_repository.py
index 8148780d3..6debde1bb 100644
--- a/monkey/tests/unit_tests/monkey_island/cc/repository/test_mongo_credentials_repository.py
+++ b/monkey/tests/unit_tests/monkey_island/cc/repository/test_mongo_credentials_repository.py
@@ -1,4 +1,4 @@
-import mongoengine
+import mongomock
 import pytest
 
 from common.credentials import Credentials
@@ -53,80 +53,81 @@ CREDENTIALS_LIST = [
 
 
 @pytest.fixture
-def fake_mongo_repository(monkeypatch):
-    mongo = mongoengine.connection.get_connection()
+def mongo_repository():
+    mongo = mongomock.MongoClient()
+
     return MongoCredentialsRepository(mongo)
 
 
-def test_mongo_repository_get_configured(fake_mongo_repository):
+def test_mongo_repository_get_configured(mongo_repository):
 
-    actual_configured_credentials = fake_mongo_repository.get_configured_credentials()
+    actual_configured_credentials = mongo_repository.get_configured_credentials()
 
     assert actual_configured_credentials == []
 
 
-def test_mongo_repository_get_stolen(fake_mongo_repository):
+def test_mongo_repository_get_stolen(mongo_repository):
 
-    actual_stolen_credentials = fake_mongo_repository.get_stolen_credentials()
+    actual_stolen_credentials = mongo_repository.get_stolen_credentials()
 
     assert actual_stolen_credentials == []
 
 
-def test_mongo_repository_get_all(fake_mongo_repository):
+def test_mongo_repository_get_all(mongo_repository):
 
-    actual_credentials = fake_mongo_repository.get_all_credentials()
+    actual_credentials = mongo_repository.get_all_credentials()
 
     assert actual_credentials == []
 
 
-def test_mongo_repository_configured(fake_mongo_repository):
+def test_mongo_repository_configured(mongo_repository):
 
-    fake_mongo_repository.save_configured_credentials(CREDENTIALS_LIST)
+    mongo_repository.save_configured_credentials(CREDENTIALS_LIST)
 
-    actual_configured_credentials = fake_mongo_repository.get_configured_credentials()
+    actual_configured_credentials = mongo_repository.get_configured_credentials()
 
     assert actual_configured_credentials == CREDENTIALS_LIST
 
-    fake_mongo_repository.remove_configured_credentials()
+    mongo_repository.remove_configured_credentials()
 
-    actual_configured_credentials = fake_mongo_repository.get_configured_credentials()
+    actual_configured_credentials = mongo_repository.get_configured_credentials()
 
     assert actual_configured_credentials == []
 
 
-def test_mongo_repository_stolen(fake_mongo_repository):
+def test_mongo_repository_stolen(mongo_repository):
 
-    fake_mongo_repository.save_configured_credentials(CONFIGURED_CREDENTIALS)
-    fake_mongo_repository.save_stolen_credentials(STOLEN_CREDENTIALS)
+    mongo_repository.save_configured_credentials(CONFIGURED_CREDENTIALS)
+    mongo_repository.save_stolen_credentials(STOLEN_CREDENTIALS)
 
-    actual_stolen_credentials = fake_mongo_repository.get_stolen_credentials()
+    actual_stolen_credentials = mongo_repository.get_stolen_credentials()
 
     assert actual_stolen_credentials == STOLEN_CREDENTIALS
 
-    fake_mongo_repository.remove_stolen_credentials()
+    mongo_repository.remove_stolen_credentials()
 
-    actual_stolen_credentials = fake_mongo_repository.get_stolen_credentials()
+    actual_stolen_credentials = mongo_repository.get_stolen_credentials()
 
     assert actual_stolen_credentials == []
 
     # Must remove configured also for the next tests
-    fake_mongo_repository.remove_configured_credentials()
+    mongo_repository.remove_configured_credentials()
 
 
-def test_mongo_repository_all(fake_mongo_repository):
+def test_mongo_repository_all(mongo_repository):
 
-    fake_mongo_repository.save_configured_credentials(CONFIGURED_CREDENTIALS)
-    fake_mongo_repository.save_stolen_credentials(STOLEN_CREDENTIALS)
+    mongo_repository.save_configured_credentials(CONFIGURED_CREDENTIALS)
+    mongo_repository.save_stolen_credentials(STOLEN_CREDENTIALS)
 
-    actual_credentials = fake_mongo_repository.get_all_credentials()
+    actual_credentials = mongo_repository.get_all_credentials()
 
     assert actual_credentials == CREDENTIALS_LIST
 
-    fake_mongo_repository.remove_all_credentials()
+    mongo_repository.remove_all_credentials()
 
-    actual_credentials = fake_mongo_repository.get_all_credentials()
-    actual_stolen_credentials = fake_mongo_repository.get_stolen_credentials()
-    actual_configured_credentials = fake_mongo_repository.get_configured_credentials()
+    actual_credentials = mongo_repository.get_all_credentials()
+    actual_stolen_credentials = mongo_repository.get_stolen_credentials()
+    actual_configured_credentials = mongo_repository.get_configured_credentials()
 
     assert actual_credentials == []
     assert actual_stolen_credentials == []