diff --git a/manage.py b/manage.py
index <HASH>..<HASH> 100755
--- a/manage.py
+++ b/manage.py
@@ -2,6 +2,11 @@
 
 import os
 import sys
+import warnings
+
+# Display deprecation warnings, which are hidden by default:
+# https://docs.python.org/2.7/library/warnings.html#default-warning-filters
+warnings.simplefilter('default', DeprecationWarning)
 
 if __name__ == "__main__":
     os.environ["DJANGO_SETTINGS_MODULE"] = "treeherder.config.settings"
Bug <I> - Enable DeprecationWarnings when running manage.py

To help surface deprecation warnings more visible when running
Django commands locally (rather than just when running pytest).
These will not cause the command to fail.