Fix failing spec.

spec/features/issues_spec.rb

@@ -226,7 +226,7 @@ describe "Issues", feature: true do
         issue.save
       end
 
-      it 'shows assignee text' do
+      it "shows assignee text", js: true do
         logout
         login_with guest
 
@@ -262,7 +262,7 @@ describe "Issues", feature: true do
         issue.save
       end
 
-      it 'shows milestone text' do
+      it "shows milestone text", js: true do
         logout
         login_with guest
 

spec/support/login_helpers.rb

@@ -19,7 +19,8 @@ module LoginHelpers
     Thread.current[:current_user] = user
   end
 
+  # Requires Javascript driver.
   def logout
-    page.find(:css, ".icon-signout").click rescue nil
+    page.find(:css, ".icon-signout").click
   end
 end