diff --git a/lib/py_lint_adapter.rb b/lib/py_lint_adapter.rb
index ea285d5a..4e5ea235 100644
--- a/lib/py_lint_adapter.rb
+++ b/lib/py_lint_adapter.rb
@@ -45,7 +45,7 @@ class PyLintAdapter < TestingFrameworkAdapter
     # The message will be translated once the results were stored in the database
     # See SubmissionScoring for actual function call
 
-    I18n.locale = locale
+    I18n.locale = locale || I18n.default_locale
 
     return assessment unless assessment[:detailed_linter_results].present?