diff --git a/tests/test_connection_manager.py b/tests/test_connection_manager.py
index 077a0d10e..4753a9d66 100644
--- a/tests/test_connection_manager.py
+++ b/tests/test_connection_manager.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import os
 import pytest
 from mock import Mock, patch, sentinel, ANY
 from moto import mock_s3
@@ -22,6 +23,10 @@ def setup_method(self, test_method):
         ConnectionManager._clients = {}
         ConnectionManager._stack_keys = {}
 
+        # Temporary workaround for https://github.com/spulec/moto/issues/1924
+        os.environ.setdefault("AWS_ACCESS_KEY_ID", "sceptre_test_key_id")
+        os.environ.setdefault("AWS_SECRET_ACCESS_KEY", "sceptre_test_access_key")
+
         self.connection_manager = ConnectionManager(
             region=self.region,
             stack_name=self.stack_name,