# Test removing EXTERNAL_NETWORK
ns.enabled_network_list.remove(EXTERNAL_NETWORK)
ne = NetworkEnvironment(ns, os.path.join(TEST_BUILD_DIR, NET_ENV_FILE))
# Test removing EXTERNAL_NETWORK
ns.enabled_network_list.remove(EXTERNAL_NETWORK)
ne = NetworkEnvironment(ns, os.path.join(TEST_BUILD_DIR, NET_ENV_FILE))