Failing Wait Tests

current_code

      it "should not throw error when running error checks on closed window" do
        browser.close
        client = Selenium::WebDriver::Remote::Http::Default.new
        client.timeout = 5
        browser = Watir::Browser.start(WatirSpec.url_for("window_switching.html"), :chrome, http_client: client)
        browser.a(:id => "open").click
        window = browser.window(:title => "closeable window")
        window.use
        browser.a(:id => "close").click
        expect { browser.driver.current_url }.to_not raise_error
        expect(window).to_not be_present
      end

desired_code

      it "should not throw error when running error checks on closed window" do
        module Watir
          class Browser
            def run_checkers
              @error_checkers.each { |e| e.call(self) } if window.present?
            end
          end
        end

        browser.goto WatirSpec.url_for("window_switching.html")
        browser.a(:id => "open").click
        window = browser.window(:title => "closeable window")
        window.use
        expect { browser.a(:id => "close").click }.to_not raise_error
        expect(window).to_not be_present
      end

Current Code fails in Firefox with the correct error & in Chrome with the wrong error

Desired code works in Chrome, but fails in Firefox.