diff --git a/lib/committee/rails/request_object.rb b/lib/committee/rails/request_object.rb
index 6b0c941..1d6f375 100644
--- a/lib/committee/rails/request_object.rb
+++ b/lib/committee/rails/request_object.rb
@@ -2,7 +2,7 @@
 
 module Committee::Rails
   class RequestObject
-    delegate(*ActionDispatch::Request.public_instance_methods, to: :@request)
+    delegate_missing_to :@request
 
     def initialize(request)
       @request = request
diff --git a/lib/committee/rails/test/methods.rb b/lib/committee/rails/test/methods.rb
index 7aab56f..ed85b32 100644
--- a/lib/committee/rails/test/methods.rb
+++ b/lib/committee/rails/test/methods.rb
@@ -10,7 +10,7 @@ def committee_options
         if defined?(RSpec) && (options = RSpec.try(:configuration).try(:committee_options))
           options
         else
-          { schema_path: default_schema }
+          { schema_path: default_schema, query_hash_key: 'rack.request.query_hash', parse_response_by_content_type: false }
         end
       end
 
diff --git a/spec/lib/methods_spec.rb b/spec/lib/methods_spec.rb
index 43847bb..859e388 100644
--- a/spec/lib/methods_spec.rb
+++ b/spec/lib/methods_spec.rb
@@ -6,13 +6,13 @@
   context 'when set option' do
     before do
       RSpec.configuration.add_setting :committee_options
-      RSpec.configuration.committee_options = { schema_path: Rails.root.join('schema', 'schema.yml').to_s, old_assert_behavior: false }
+      RSpec.configuration.committee_options = { schema_path: Rails.root.join('schema', 'schema.yml').to_s, old_assert_behavior: false, query_hash_key: 'rack.request.query_hash', parse_response_by_content_type: false }
     end
 
     context 'and when response conform YAML Schema' do
       it 'pass' do
         post '/users', params: { nickname: 'willnet' }.to_json, headers: { 'Content-Type' =>  'application/json' }
-        assert_schema_conform
+        assert_schema_conform(200)
       end
 
       context 'and override #request method' do
@@ -22,7 +22,7 @@ def request
 
         it 'pass' do
           post '/users', params: { nickname: 'willnet' }.to_json, headers: { 'Content-Type' =>  'application/json' }
-          assert_schema_conform
+          assert_schema_conform(200)
         end
       end
 
@@ -33,7 +33,7 @@ def response
 
         it 'pass' do
           post '/users', params: { nickname: 'willnet' }.to_json, headers: { 'Content-Type' =>  'application/json' }
-          assert_schema_conform
+          assert_schema_conform(200)
         end
       end
     end
@@ -41,22 +41,25 @@ def response
     context "and when response doesn't conform YAML Schema" do
       it 'raise Committee::InvalidResponse' do
         patch '/users/1', params: { nickname: 'willnet' }.to_json, headers: { 'Content-Type' =>  'application/json', 'Accept' => 'application/json' }
-        expect { assert_schema_conform }.to raise_error(Committee::InvalidResponse)
+        expect { assert_schema_conform(200) }.to raise_error(Committee::InvalidResponse)
       end
     end
 
     context 'and when bad request' do
       around do |example|
+        original_show_detailed_exceptions = Rails.application.env_config['action_dispatch.show_detailed_exceptions']
+        original_show_exceptions = Rails.application.env_config['action_dispatch.show_exceptions']
         Rails.application.env_config['action_dispatch.show_detailed_exceptions'] = false
         Rails.application.env_config['action_dispatch.show_exceptions'] = true
-
-        example.run
-
-        Rails.application.env_config['action_dispatch.show_detailed_exceptions'] = true
-        Rails.application.env_config['action_dispatch.show_exceptions'] = false
+        begin
+          example.run
+        ensure
+          Rails.application.env_config['action_dispatch.show_detailed_exceptions'] = original_show_detailed_exceptions
+          Rails.application.env_config['action_dispatch.show_exceptions'] = original_show_exceptions
+        end
       end
 
-      it 'pass' do
+      it 'pass as 400' do
         patch '/users/0', params: { nickname: 'willnet' }.to_json, headers: { 'Content-Type': 'application/json', 'Accept' => 'application/json' }
         assert_schema_conform(400)
       end
@@ -71,18 +74,18 @@ def response
 
       it 'use default setting' do
         post '/users', params: { nickname: 'willnet' }
-        expect{ assert_schema_conform }.to raise_error(Errno::ENOENT) # not exist doc/schema/schema.json
+        expect{ assert_schema_conform(200) }.to raise_error(Errno::ENOENT) # not exist doc/schema/schema.json
       end
     end
 
     context 'when override default setting' do
       def committee_options
-        { schema_path: Rails.root.join('schema', 'schema.yml').to_s, old_assert_behavior: false }
+        { schema_path: Rails.root.join('schema', 'schema.yml').to_s, old_assert_behavior: false, query_hash_key: 'rack.request.query_hash', parse_response_by_content_type: false }
       end
 
       it 'use the setting' do
         post '/users', params: { nickname: 'willnet' }.to_json, headers: { 'Content-Type' =>  'application/json' }
-        assert_schema_conform
+        assert_schema_conform(200)
       end
     end
   end