diff --git a/lib/capybara/driver/selenium_driver.rb b/lib/capybara/driver/selenium_driver.rb
index af9af4c9..5af718d5 100644
--- a/lib/capybara/driver/selenium_driver.rb
+++ b/lib/capybara/driver/selenium_driver.rb
@@ -128,7 +128,8 @@ class Capybara::Driver::Selenium < Capybara::Driver::Base
   end
 
   def reset!
-    browser.manage.delete_all_cookies
+    # Use instance variable directly so we avoid starting the browser just to reset the session
+    @browser.manage.delete_all_cookies if @browser
   end
 
   def within_frame(frame_id)