diff --git a/lib/debug/server_cdp.rb b/lib/debug/server_cdp.rb
index d4e012fe2..c1e2d8352 100644
--- a/lib/debug/server_cdp.rb
+++ b/lib/debug/server_cdp.rb
@@ -419,6 +419,7 @@ def send **msg
 
       def extract_data
         first_group = @sock.getbyte
+        raise Detach if first_group == nil
         fin = first_group & 0b10000000 != 128
         raise 'Unsupported' if fin
 
@@ -489,7 +490,8 @@ def process
                         id: SecureRandom.hex
         when 'Runtime.terminateExecution'
           send_response req
-          exit
+          @q_msg << 'q!'
+          pause unless SESSION.in_subsession?
         when 'Page.startScreencast', 'Emulation.setTouchEmulationEnabled', 'Emulation.setEmitTouchEventsForMouse',
           'Runtime.compileScript', 'Page.getResourceContent', 'Overlay.setPausedInDebuggerMessage',
           'Runtime.releaseObjectGroup', 'Runtime.discardConsoleEntries', 'Log.clear', 'Runtime.runIfWaitingForDebugger'