diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 3da55a4..e53a66d 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -118,5 +118,7 @@
 end
 
 def app
-  App
+  App.class_eval do
+    set :host_authorization, { permitted_hosts: [] }
+  end
 end