diff --git a/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt b/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
index f91512b3af..2778dd8247 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
+++ b/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
@@ -23,12 +23,6 @@ Rails.application.configure do
     config.action_controller.perform_caching = false
     config.cache_store = :null_store
   end
-  <%- if options[:api] -%>
-
-  # Return error responses in the format requested by the client
-  # or default to JSON format.
-  config.debug_exception_response_format = :api
-  <%- end -%>
   <%- unless options.skip_action_mailer? -%>
 
   # Don't care if the mailer can't send.
diff --git a/railties/test/generators/api_app_generator_test.rb b/railties/test/generators/api_app_generator_test.rb
index 7273c67a4e..b5980746bb 100644
--- a/railties/test/generators/api_app_generator_test.rb
+++ b/railties/test/generators/api_app_generator_test.rb
@@ -48,10 +48,6 @@ class ApiAppGeneratorTest < Rails::Generators::TestCase
       assert_match(/config.api_only = true/, content)
     end
 
-    assert_file "config/environments/development.rb" do |content|
-      assert_match(/config.debug_exception_response_format = :api/, content)
-    end
-
     assert_file "config/initializers/cors.rb"
 
     assert_file "config/initializers/wrap_parameters.rb"