diff --git a/dhlmex/client.py b/dhlmex/client.py
index 09ef370..c5d641b 100644
--- a/dhlmex/client.py
+++ b/dhlmex/client.py
@@ -22,7 +22,7 @@ class Client:
     ...
 
     def __init__(
-        self, username: Optional[str] = None, password: Optional[str] = None
+        self, username: Optional[str] = None, password: Optional[str] = None,
     ):
         username = username or os.environ['DHLMEX_USERNAME']
         password = password or os.environ['DHLMEX_PASSWORD']
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..c08cb26
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,14 @@
+import pytest
+from requests import Request
+
+
+def remove_creds(request: Request) -> Request:
+    # remove username and password
+    return request
+
+
+@pytest.fixture(scope='module')
+def vcr_config() -> dict:
+    config = dict()
+    config['before_record_request'] = remove_creds
+    return config
\ No newline at end of file
diff --git a/tests/test_client_login.py b/tests/test_client_login.py
new file mode 100644
index 0000000..7098df3
--- /dev/null
+++ b/tests/test_client_login.py
@@ -0,0 +1,14 @@
+import os
+
+import pytest
+
+from dhlmex import Client
+
+DHLMEX_USERNAME = os.environ['DHLMEX_USERNAME']
+DHLMEX_PASSWORD = os.environ['DHLMEX_PASSWORD']
+
+
+@pytest.mark.vcr
+def test_successful_login():
+    assert Client(DHLMEX_USERNAME, DHLMEX_PASSWORD)
+