diff --git a/monkey/tests/monkey_island/in_memory_credentials_repository.py b/monkey/tests/monkey_island/in_memory_credentials_repository.py
new file mode 100644
index 000000000..6eb8155e8
--- /dev/null
+++ b/monkey/tests/monkey_island/in_memory_credentials_repository.py
@@ -0,0 +1,35 @@
+from typing import Sequence
+
+from common.credentials import Credentials
+from monkey_island.cc.repository import ICredentialsRepository
+
+
+class InMemoryCredentialsRepository(ICredentialsRepository):
+    def __init__(self):
+        self._configured_credentials = []
+        self._stolen_credentials = []
+
+    def get_configured_credentials(self) -> Sequence[Credentials]:
+        return self._configured_credentials
+
+    def get_stolen_credentials(self) -> Sequence[Credentials]:
+        return self._stolen_credentials
+
+    def get_all_credentials(self) -> Sequence[Credentials]:
+        return [*self._configured_credentials, *self._stolen_credentials]
+
+    def save_configured_credentials(self, credentials: Sequence[Credentials]):
+        self._configured_credentials.extend(credentials)
+
+    def save_stolen_credentials(self, credentials: Sequence[Credentials]):
+        self._stolen_credentials.extend(credentials)
+
+    def remove_configured_credentials(self):
+        self._configured_credentials = []
+
+    def remove_stolen_credentials(self):
+        self._stolen_credentials = []
+
+    def remove_all_credentials(self):
+        self.remove_configured_credentials()
+        self.remove_stolen_credentials()