Next set your test pattern and config file. The example below assumes you are running the grpc test against the snapshot avd configurations.
export TEST_PATTERN='test_grpc.*' export CONFIG_FILE=external/adt-infra/emu_test/config/snapshot_cfg_byob.csv export ANDROID_AVD_HOME=/tmp/avds
cd $AOSP; \ mkdir -p $ANDROID_AVD_HOME; \ rm -rf /tmp/test/; mkdir -p /tmp/test; \ ninja -C $AOSP/external/qemu/objs && python -u external/adt-infra/emu_test/dotest.py \ --loglevel DEBUG \ --session_dir /tmp/test \ --emulator $AOSP/external/qemu/objs/emulator \ --test_dir gprc_test \ --file_pattern $TEST_PATTERN \ --buildername Linux \ --config_file $CONFIG_FILE \ --skip-adb-perf \ --generate_xml