diff --git a/spec/models/course_spec.rb b/spec/models/course_spec.rb
index 353fe81db..da0911427 100644
--- a/spec/models/course_spec.rb
+++ b/spec/models/course_spec.rb
@@ -546,6 +546,7 @@
         self_item1 = Item.find_by(sort: "self", medium: @course_medium)
         self_item2 = Item.find_by(sort: "self", medium: @lecture_medium)
         self_item3 = Item.find_by(sort: "self", medium: @lesson_medium)
+        I18n.locale = :de
         expect(@course.media_items_with_inheritance)
           .to match_array([["Bem. 1.2 ", item1.id],
                            ["SS 20, Satz 3.4 ", item2.id],