1 files changed, 2 insertions, 0 deletions
diff --git a/railties/test/isolation/abstract_unit.rb b/railties/test/isolation/abstract_unit.rb
index d4eed69a87..39c936428f 100644
--- a/railties/test/isolation/abstract_unit.rb
+++ b/railties/test/isolation/abstract_unit.rb
@@ -197,6 +197,7 @@ module TestHelpers
       end
 
       add_to_config <<-RUBY
+        config.hosts << proc { true }
         config.eager_load = false
         config.session_store :cookie_store, key: "_myapp_session"
         config.active_support.deprecation = :log
@@ -220,6 +221,7 @@ module TestHelpers
       @app = Class.new(Rails::Application) do
         def self.name; "RailtiesTestApp"; end
       end
+      @app.config.hosts << proc { true }
       @app.config.eager_load = false
       @app.config.session_store :cookie_store, key: "_myapp_session"
       @app.config.active_support.deprecation = :log