diff --git a/spec/dummy/application.rb b/spec/dummy/application.rb
index 0b1880ec..fd14a1e3 100644
--- a/spec/dummy/application.rb
+++ b/spec/dummy/application.rb
@@ -33,6 +33,8 @@ class Application < Rails::Application
     config.secret_token = "SECRET_TOKEN_IS_MIN_30_CHARS_LONG"
     config.secret_key_base = "SECRET_KEY_BASE"
 
+    config.active_support.to_time_preserves_timezone = :zone
+
     def require_environment!
       initialize!
     end