diff --git a/test/test_helper.rb b/test/test_helper.rb
index f43b10d..1ab7e9e 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -319,7 +319,7 @@ module Redmine
     def log_user(login, password)
       User.anonymous
       get "/login"
-      assert_equal nil, session[:user_id]
+      assert_nil session[:user_id]
       assert_response :success
 
       post "/login", :username => login, :password => password