diff --git a/tests/flytekit/unit/clients/auth/test_token_client.py b/tests/flytekit/unit/clients/auth/test_token_client.py
index 4059450965..c22284cd38 100644
--- a/tests/flytekit/unit/clients/auth/test_token_client.py
+++ b/tests/flytekit/unit/clients/auth/test_token_client.py
@@ -18,7 +18,7 @@ def test_get_basic_authorization_header():
     header = get_basic_authorization_header("client_id", "abc")
     assert header == "Basic Y2xpZW50X2lkOmFiYw=="
 
-    header = get_basic_authorization_header("client_id", "abc%%$?\\/\/")
+    header = get_basic_authorization_header("client_id", "abc%%$?\\/\\/")
     assert header == "Basic Y2xpZW50X2lkOmFiYyUyNSUyNSUyNCUzRiU1QyUyRiU1QyUyRg=="