diff --git a/.travis.yml b/.travis.yml
index 1a2734d..d050941 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,17 +5,25 @@ rvm:
 
 env:
   - RAILS_VERSION=5.2.0
-  - RAILS_VERSION=4.2.8
+  # - RAILS_VERSION=4.2.8
 
 cache:
   directories:
     - /home/travis/.rvm/gems/ruby-2.5.1
 
+addons:
+  apt:
+    packages:
+    - libqtwebkit-dev
+    - libqtwebkit4
+
 install: ./ci/build.sh
 
+services:
+- xvfb
+
 before_script:
   - export DISPLAY=:99.0
-  - sh -e /etc/init.d/xvfb start
   - sleep 3
 
 script: ./ci/test.sh
diff --git a/rswag-specs/lib/open_api/rswag/specs/example_group_helpers.rb b/rswag-specs/lib/open_api/rswag/specs/example_group_helpers.rb
index 58fc489..b0efcbe 100644
--- a/rswag-specs/lib/open_api/rswag/specs/example_group_helpers.rb
+++ b/rswag-specs/lib/open_api/rswag/specs/example_group_helpers.rb
@@ -238,7 +238,9 @@ module OpenApi
 
               if body_parameter && respond_to?(body_parameter[:name]) && example.metadata[:operation][:requestBody][:content]['application/json']
                 # save response examples by default
-                example.metadata[:response][:examples] = { 'application/json' => JSON.parse(response.body, symbolize_names: true) } unless response.body.to_s.empty?
+                if example.metadata[:response][:examples].nil? || example.metadata[:response][:examples].empty?
+                  example.metadata[:response][:examples] = { 'application/json' => JSON.parse(response.body, symbolize_names: true) } unless response.body.to_s.empty?
+                end
 
                 # save request examples using the let(:param_name) { REQUEST_BODY_HASH } syntax in the test
                 if response.code.to_s =~ /^2\d{2}$/