only run the window tests once on travis

.travis.yml

@@ -3,13 +3,15 @@ sudo: false
 rvm:
   - 2.0.0
   - 2.2
-  - 2.3.0
   - jruby-9.0.3.0
   - rbx-2
 gemfile:
   - Gemfile
 matrix:
   include:
+    - gemfile: Gemfile
+      rvm: 2.3.0
+      env: WINDOW_TEST=true
     - gemfile: gemfiles/Gemfile.ruby-19
       rvm: 1.9.3
     - gemfile: gemfiles/Gemfile.ruby-19

spec/selenium_spec.rb

@@ -12,11 +12,14 @@ module TestSessions
   Selenium = Capybara::Session.new(:selenium_focus, TestApp)
 end
 
-Capybara::SpecHelper.run_specs TestSessions::Selenium, "selenium", :capybara_skip => [
+skipped_tests = [
   :response_headers,
   :status_code,
   :trigger
 ]
+skipped_tests << :windows if ENV['TRAVIS'] && !ENV['WINDOW_TEST']
+
+Capybara::SpecHelper.run_specs TestSessions::Selenium, "selenium", :capybara_skip => skipped_tests
 
 RSpec.describe Capybara::Session do
   context 'with selenium driver' do