diff --git a/config/environments/test.rb b/config/environments/test.rb
index 7654ee3d78..dc2ed580f9 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -31,7 +31,7 @@ Openfoodnetwork::Application.configure do
   # ActionMailer::Base.deliveries array.
   config.action_mailer.delivery_method = :test
 
-  config.time_zone = ENV.fetch("TIMEZONE", "Melbourne")
+  config.time_zone = "UTC"
 
   # Tests assume English text on the site.
   config.i18n.default_locale = "en"