diff --git a/sites/dev/settings_mkt.py b/sites/dev/settings_mkt.py
index df9f86ddfd1..eabc915839e 100644
--- a/sites/dev/settings_mkt.py
+++ b/sites/dev/settings_mkt.py
@@ -185,3 +185,6 @@
 MINIFY_BUNDLES['js'].update(asset_bundles.jquery_migrated())
 
 MONOLITH_PASSWORD = private_mkt.MONOLITH_PASSWORD
+
+# This is mainly for Marionette tests.
+WEBAPP_MANIFEST_NAME = 'Marketplace Dev'
diff --git a/sites/stage/settings_mkt.py b/sites/stage/settings_mkt.py
index 357f03be1a4..d91c5da3582 100644
--- a/sites/stage/settings_mkt.py
+++ b/sites/stage/settings_mkt.py
@@ -172,3 +172,6 @@
 APP_PURCHASE_SECRET = private_mkt.APP_PURCHASE_SECRET
 
 MONOLITH_PASSWORD = private_mkt.MONOLITH_PASSWORD
+
+# This is mainly for Marionette tests.
+WEBAPP_MANIFEST_NAME = 'Marketplace Stage'