diff --git a/rb/lib/selenium/webdriver/common/driver.rb b/rb/lib/selenium/webdriver/common/driver.rb
index c24e8ec28ae66..39380a833b4d3 100644
--- a/rb/lib/selenium/webdriver/common/driver.rb
+++ b/rb/lib/selenium/webdriver/common/driver.rb
@@ -69,7 +69,6 @@ def for(browser, opts = {})
       #
 
       def initialize(bridge: nil, listener: nil, **opts)
-        @service_manager = nil
         @devtools = nil
         @bidi = nil
         bridge ||= create_bridge(**opts)