@@ -5,7 +5,9 @@ const RUNNER_COMMAND_SCHEMA = 'ValidationRunnerCommandV1'
 
 if (process.env.DEVCODEX_VALIDATION_WORKER_FAULT === 'disconnect-before-command') {
   if (process.connected) process.disconnect()
-  setTimeout(() => process.exit(19), 10)
+  // Keep the disconnected process alive past the runner's delayed dispatch so
+  // the fixture deterministically exercises the send-error closeout branch.
+  setTimeout(() => process.exit(19), 1000)
 }
 
 function createSender(message) {
Original file line number	Diff line number	Diff line change
`@@ -5,7 +5,9 @@ const RUNNER_COMMAND_SCHEMA = 'ValidationRunnerCommandV1'`
`5`	`5`
`6`	`6`	`if (process.env.DEVCODEX_VALIDATION_WORKER_FAULT === 'disconnect-before-command') {`
`7`	`7`	`if (process.connected) process.disconnect()`
`8`		`- setTimeout(() => process.exit(19), 10)`
	`8`	`+ // Keep the disconnected process alive past the runner's delayed dispatch so`
	`9`	`+ // the fixture deterministically exercises the send-error closeout branch.`
	`10`	`+ setTimeout(() => process.exit(19), 1000)`
`9`	`11`	`}`
`10`	`12`
`11`	`13`	`function createSender(message) {`