before, not before(:all)

spec/driver/remote_selenium_driver_spec.rb

@@ -1,16 +1,13 @@
 require 'spec_helper'
 
 describe Capybara::Driver::Selenium do
-  before(:all) do
+  before do
     Capybara.app_host = "http://capybara-testapp.heroku.com"
-  end
-  
-  after(:all) do
-    Capybara.app_host = nil
+    @driver = TestSessions::Selenium.driver
   end
 
-  before do
-    @driver = TestSessions::Selenium.driver
+  after do
+    Capybara.app_host = nil
   end
 
   it_should_behave_like "driver"