diff --git a/spec/honeycomb/integrations/sinatra_spec.rb b/spec/honeycomb/integrations/sinatra_spec.rb
index 4a316af..51c6f71 100644
--- a/spec/honeycomb/integrations/sinatra_spec.rb
+++ b/spec/honeycomb/integrations/sinatra_spec.rb
@@ -8,6 +8,8 @@
     include Rack::Test::Methods
 
     class App < Sinatra::Application
+      set :host_authorization, { permitted_hosts: [] }
+
       get "/" do
         "Hello world"
       end