diff --git a/monkey/tests/unit_tests/infection_monkey/credential_store/test_credential_store.py b/monkey/tests/unit_tests/infection_monkey/credential_store/test_credential_store.py
new file mode 100644
index 000000000..83382dc3e
--- /dev/null
+++ b/monkey/tests/unit_tests/infection_monkey/credential_store/test_credential_store.py
@@ -0,0 +1,81 @@
+from unittest.mock import MagicMock
+
+import pytest
+
+from infection_monkey.credential_store import AggregatingCredentialsStore
+
+DEFAULT_CREDENTIALS = {
+    "exploit_user_list": ["Administrator", "root", "user1"],
+    "exploit_password_list": [
+        "root",
+        "123456",
+        "password",
+        "123456789",
+    ],
+    "exploit_lm_hash_list": ["aasdf23asd1fdaasadasdfas"],
+    "exploit_ntlm_hash_list": ["qw4trklxklvznksbhasd1231", "asdfadvxvsdftw3e3421234123412"],
+    "exploit_ssh_keys": [
+        {
+            "public_key": "ssh-ed25519 AAAAC3NzEIFaJ7xH+Yoxd\n",
+            "private_key": "-----BEGIN OPENSSH PRIVATE KEY-----\nb3BdHIAAAAGYXjl0j66VAKruPEKjS3A=\n"
+            "-----END OPENSSH PRIVATE KEY-----\n",
+            "user": "ubuntu",
+            "ip": "10.0.3.15",
+        },
+        {"public_key": "some_public_key", "private_key": "some_private_key"},
+    ],
+}
+
+
+SAMPLE_CREDENTIALS = {
+    "exploit_user_list": ["user1", "user3"],
+    "exploit_password_list": ["abcdefg", "root"],
+    "exploit_ssh_keys": [{"public_key": "some_public_key", "private_key": "some_private_key"}],
+    "exploit_ntlm_hash_list": [],
+}
+
+
+@pytest.fixture
+def aggregating_credentials_store() -> AggregatingCredentialsStore:
+    return AggregatingCredentialsStore()
+
+
+@pytest.mark.parametrize("credentials_to_store", [DEFAULT_CREDENTIALS, SAMPLE_CREDENTIALS])
+def test_get_credentials_from_store(aggregating_credentials_store, credentials_to_store):
+    get_updated_credentials_for_propagation = MagicMock(return_value=credentials_to_store)
+
+    aggregating_credentials_store.get_credentials(get_updated_credentials_for_propagation)
+
+    assert aggregating_credentials_store.stored_credentials == credentials_to_store
+
+
+def test_add_credentials_to_empty_store(aggregating_credentials_store):
+
+    aggregating_credentials_store.add_credentials(SAMPLE_CREDENTIALS)
+
+    assert aggregating_credentials_store.stored_credentials == SAMPLE_CREDENTIALS
+
+
+def test_add_credentials_to_full_store(aggregating_credentials_store):
+    get_updated_credentials_for_propagation = MagicMock(return_value=DEFAULT_CREDENTIALS)
+
+    aggregating_credentials_store.get_credentials(get_updated_credentials_for_propagation)
+
+    aggregating_credentials_store.add_credentials(SAMPLE_CREDENTIALS)
+
+    actual_stored_credentials = aggregating_credentials_store.stored_credentials
+
+    assert actual_stored_credentials["exploit_user_list"] == [
+        "Administrator",
+        "root",
+        "user1",
+        "user3",
+    ]
+    assert actual_stored_credentials["exploit_password_list"] == [
+        "123456",
+        "123456789",
+        "abcdefg",
+        "password",
+        "root",
+    ]
+    assert actual_stored_credentials["exploit_ssh_keys"] == DEFAULT_CREDENTIALS["exploit_ssh_keys"]