FIX: Incorrect path for redirect.

app/controllers/safe_mode_controller.rb

@@ -14,7 +14,7 @@ class SafeModeController < ApplicationController
     if safe_mode.length > 0
       redirect_to path("/?safe_mode=#{safe_mode.join("%2C")}")
     else
-      redirect_to :index
+      redirect_to safe_mode_path
     end
   end
 end

spec/integration/safe_mode_spec.rb

@@ -0,0 +1,13 @@
+require 'rails_helper'
+
+RSpec.describe 'Safe mode' do
+  describe 'entering safe mode' do
+    context 'when no params are given' do
+      it 'should redirect back to safe mode page' do
+        post '/safe-mode'
+
+        expect(response.status).to redirect_to(safe_mode_path)
+      end
+    end
+  end
+end