diff --git a/tests/conftest.py b/tests/conftest.py
index 08002cd8b..f868d72a9 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -76,18 +76,21 @@ def pytest_runtest_setup(item):
 def setup_stripe():
     orig_attrs = {
         "api_base": stripe.api_base,
+        "upload_api_base": stripe.upload_api_base,
         "api_key": stripe.api_key,
         "client_id": stripe.client_id,
         "default_http_client": stripe.default_http_client,
     }
     http_client = stripe.http_client.new_default_http_client()
     stripe.api_base = "http://localhost:%s" % MOCK_PORT
+    stripe.upload_api_base = "http://localhost:%s" % MOCK_PORT
     stripe.api_key = "sk_test_123"
     stripe.client_id = "ca_123"
     stripe.default_http_client = http_client
     yield
     http_client.close()
     stripe.api_base = orig_attrs["api_base"]
+    stripe.upload_api_base = orig_attrs["upload_api_base"]
     stripe.api_key = orig_attrs["api_key"]
     stripe.client_id = orig_attrs["client_id"]
     stripe.default_http_client = orig_attrs["default_http_client"]