diff --git a/core/tools/ktestinit/main.go b/core/tools/ktestinit/main.go
index 9eb2342..f6049db 100644
--- a/core/tools/ktestinit/main.go
+++ b/core/tools/ktestinit/main.go
@@ -74,7 +74,10 @@
 		} else if err != nil {
 			fmt.Printf("Failed to execute tests (tests didn't run): %v", err)
 		}
+	} else {
+		ioConn.Write([]byte{0})
 	}
+	ioConn.Close()
 
 	unix.Reboot(unix.LINUX_REBOOT_CMD_RESTART)
 }