Flutter HHH bot web tool tests fail with "SocketException: Failed to create server socket" #1378

 [+2017 ms] SocketException: Failed to create server socket (OS Error: Address already in use, errno = 98), address = 127.0.0.1, port = 34453
             #0      _NativeSocket.bind (dart:io-patch/socket_patch.dart:962:7)
             <asynchronous suspension>
             #1      HttpMultiServer._loopback (package:http_multi_server/http_multi_server.dart:177:20)
             <asynchronous suspension>
             #2      DebugService.start (package:dwds/src/services/debug_service.dart:257:18)
             <asynchronous suspension>
             #3      DevHandler.loadAppServices (package:dwds/src/handlers/dev_handler.dart:223:26)
             <asynchronous suspension>
             #4      Dwds.debugConnection (package:dwds/dwds.dart:89:28)
             <asynchronous suspension>
             #5      WebDevFS.connect.<anonymous closure> (package:flutter_tools/src/isolated/devfs_web.dart:682:15)
             <asynchronous suspension>