matrix_test.rb in capybara-screenshot-diff-0.7.0 vs matrix_test.rb in capybara-screenshot-diff-0.7.1

@@ -12,11 +12,11 @@
     ENV[key] = value
   end
   puts '*' * 80
   puts "Testing #{ruby} #{gemfile} #{env}"
   puts
-  system "chruby-exec #{ruby} -- bundle exec rake" || exit(1)
+  system("chruby-exec #{ruby} -- bundle exec rake") || exit(1)
   puts '*' * 80
 end
 
 def use_gemfile(ruby, gemfile, update_gemfiles)
   puts '$' * 80
@@ -40,11 +40,12 @@
   puts
   system "ruby-install --no-reinstall #{ruby}" || exit(1)
   bundler_gem_check_cmd = "chruby-exec #{ruby} -- gem query -i -n bundler >/dev/null"
   system "#{bundler_gem_check_cmd} || chruby-exec #{ruby} -- gem install bundler" || exit(1)
   travis['gemfile'].each do |gemfile|
-    if (travis['matrix']['exclude'].to_a + travis['matrix']['allowed_failures'].to_a)
-        .any? { |f| f['rvm'] == ruby && f['gemfile'] == gemfile }
+    if travis['matrix'] &&
+        (travis['matrix']['exclude'].to_a + travis['matrix']['allowed_failures'].to_a)
+            .any? { |f| f['rvm'] == ruby && f['gemfile'] == gemfile }
       puts 'Skipping known failure.'
       next
     end
     use_gemfile(ruby, gemfile, update_gemfiles) do
       travis['env'].each do |env|