diff --git a/test/unit/issue_test.rb b/test/unit/issue_test.rb
index 432dd8745..3bbe75158 100644
--- a/test/unit/issue_test.rb
+++ b/test/unit/issue_test.rb
@@ -33,6 +33,7 @@ class IssueTest < ActiveSupport::TestCase
   include Redmine::I18n
 
   def setup
+    User.current = nil
     set_language_if_valid 'en'
   end