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我正在使用capybara-webkit与水豚和红宝石进行这些测试。我有一个3个场景的功能文件。第二种情况后，它只是挂起来，并告诉我错误水豚-webkit：无法重置会话
Request timed out after -1 second(s) (Capybara::Webkit::TimeoutError)
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-webkit-1.11.1/lib/capybara/webkit/browser.rb:305:in `check'
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-webkit-1.11.1/lib/capybara/webkit/browser.rb:211:in `command'
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-webkit-1.11.1/lib/capybara/webkit/browser.rb:39:in `reset!'
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-webkit-1.11.1/lib/capybara/webkit/driver.rb:264:in `reset!'
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-2.7.1/lib/capybara/session.rb:109:in `reset!'
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-2.7.1/lib/capybara.rb:331:in `block in reset_sessions!'
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-2.7.1/lib/capybara.rb:331:in `reverse_each'
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-2.7.1/lib/capybara.rb:331:in `reset_sessions!'
/home/waqaslatif/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-2.7.1/lib/capybara/cucumber.rb:9:in `After'
如果我分别运行所有三个场景，那么所有传递。我怎样才能让他们一起运行，避免上述错误。