diff --git a/tests/flytekit/unit/clients/auth/test_authenticator.py b/tests/flytekit/unit/clients/auth/test_authenticator.py
index f23019f607..82ffa654dd 100644
--- a/tests/flytekit/unit/clients/auth/test_authenticator.py
+++ b/tests/flytekit/unit/clients/auth/test_authenticator.py
@@ -118,9 +118,17 @@ def test_device_flow_authenticator(poll_mock: MagicMock, device_mock: MagicMock,
     assert authn._creds
 
 
-@patch("flytekit.clients.auth.token_client.requests")
-def test_client_creds_authenticator_with_custom_scopes(mock_requests):
+@patch("flytekit.clients.auth.token_client.requests.Session")
+def test_client_creds_authenticator_with_custom_scopes(mock_session):
     expected_scopes = ["foo", "baz"]
+
+    session = MagicMock()
+    response = MagicMock()
+    response.status_code = 200
+    response.json.return_value = json.loads("""{"access_token": "abc", "expires_in": 60}""")
+    session.post.return_value = response
+    mock_session.return_value = session
+
     authn = ClientCredentialsAuthenticator(
         ENDPOINT,
         client_id="client",
@@ -129,11 +137,9 @@ def test_client_creds_authenticator_with_custom_scopes(mock_requests):
         scopes=expected_scopes,
         verify=True,
     )
-    response = MagicMock()
-    response.status_code = 200
-    response.json.return_value = json.loads("""{"access_token": "abc", "expires_in": 60}""")
-    mock_requests.post.return_value = response
+
     authn.refresh_credentials()
 
     assert authn._creds
+    assert authn._creds.access_token == "abc"
     assert authn._scopes == expected_scopes