Set locale for tests (#1427)

* Fix locale for tests #1426

* Update devproject/test_settings.py

Co-authored-by: Rafał Pitoń <kontakt@rpiton.com>

devproject/test_settings.py

@@ -32,6 +32,9 @@ AUTH_PASSWORD_VALIDATORS = [
 # Use english search config
 MISAGO_SEARCH_CONFIG = "english"
 
+# Test assertions expect english locale
+LANGUAGE_CODE = "en-us"
+
 # Register test post validator
 MISAGO_POST_VALIDATORS = ["misago.core.testproject.validators.test_post_validator"]