| Function | debug_threads | Undocumented |
| Class | TestServer | A Transport Server dedicated to tests. |
| Class | LocalURLServer | A pretend server for local transports, using file:// urls. |
| Class | DecoratorServer | Server for the TransportDecorator for testing with. |
| Class | BrokenRenameServer | Server for the BrokenRenameTransportDecorator for testing with. |
| Class | FakeNFSServer | Server for the FakeNFSTransportDecorator for testing with. |
| Class | FakeVFATServer | A server that suggests connections through FakeVFATTransportDecorator |
| Class | LogDecoratorServer | Server for testing. |
| Class | NoSmartTransportServer | Server for the NoSmartTransportDecorator for testing with. |
| Class | ReadonlyServer | Server for the ReadonlyTransportDecorator for testing with. |
| Class | TraceServer | Server for the TransportTraceDecorator for testing with. |
| Class | UnlistableServer | Server for the UnlistableTransportDecorator for testing with. |
| Class | TestingPathFilteringServer | No class docstring; 2/3 methods documented |
| Class | TestingChrootServer | No class docstring; 2/3 methods documented |
| Class | TestThread | No class docstring; 1/1 methods documented |
| Class | TestingTCPServerMixin | Mixin to support running SocketServer.TCPServer in a thread. |
| Class | TestingTCPServer | No class docstring; 1/3 methods documented |
| Class | TestingThreadingTCPServer | No class docstring; 2/7 methods documented |
| Class | TestingTCPServerInAThread | A server in a thread that re-raise thread exceptions. |
| Class | TestingSmartConnectionHandler | Undocumented |
| Class | TestingSmartServer | No class docstring; 1/3 methods documented |
| Class | SmartTCPServer_for_testing | Server suitable for use by transport tests. |
| Class | ReadonlySmartTCPServer_for_testing | Get a readonly server for testing. |
| Class | SmartTCPServer_for_testing_v2_only | A variation of SmartTCPServer_for_testing that limits the client to |
| Class | ReadonlySmartTCPServer_for_testing_v2_only | Get a readonly server for testing. |