# Running a test locally during development To start a server during development: 1. Choose an available port number. 2. Start the server: ``` GRPC_VERBOSITY=DEBUG ibazel run --compilation_mode=dbg //test/cpp/interop:interop_server -- --port={port_number} ``` 3. Start the client: ``` GRPC_VERBOSITY=DEBUG ibazel run --test_output=streamed //test/cpp/interop:interop_client -- --server_port={port_number} --test_case={test_case} ```