diff --git a/spec/ci_ruby_version_spec.rb b/spec/ci_ruby_version_spec.rb
index 3b47ec5..7a39ad5 100644
--- a/spec/ci_ruby_version_spec.rb
+++ b/spec/ci_ruby_version_spec.rb
@@ -14,7 +14,7 @@ describe 'ci ruby version' do
 
   context "in #{ci_config_file} and pages ruby version" do
     it 'match' do
-      msg = "(#{ci_ruby_version}) != (#{pages_ruby_version})"
+      msg = "#{ci_ruby_version} != #{pages_ruby_version}; please add a commit bumping in #{ci_config_file}"
       expect(ci_ruby_version).to eql(pages_ruby_version), msg
     end
   end