diff --git a/api/web/start.py b/api/web/start.py
index 54a890990ed72899b3284707ea0c4456c02d66f7..025ec6ecba20d5f909865e4ca93a1c1e4e70e7b7 100644
--- a/api/web/start.py
+++ b/api/web/start.py
@@ -2,8 +2,15 @@ import atexit
 import json
 import os
 import traceback
+import warnings
+
 import webapp2
 
+
+# Disable warnings for implicit tempfile.TemporaryDirectory cleanup
+warnings.filterwarnings('ignore', message=r'Implicitly cleaning up <TemporaryDirectory')
+
+
 # Enable code coverage for testing when API is started
 # Start coverage before local module loading so their def and imports are counted
 #   http://coverage.readthedocs.io/en/coverage-4.2/faq.html