make -C tools/testing/selftests TARGETS="drivers/net" TEST_PROGS=ping.py TTEST_GEN_PROGS="" run_tests
make: Entering directory '/home/virtme/testing-17/tools/testing/selftests'
make[1]: Entering directory '/home/virtme/testing-17/tools/testing/selftests/drivers/net'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/virtme/testing-17/tools/testing/selftests/drivers/net'
make[1]: Entering directory '/home/virtme/testing-17/tools/testing/selftests/drivers/net'
TAP version 13
1..1
# timeout set to 45
# selftests: drivers/net: ping.py
#   File "/home/virtme/testing-17/tools/testing/selftests/drivers/net/./ping.py", line 13
#     cmd(f"ping -c 1 -W0.5 {cfg.remote_addr_v["4"]}")
#                                               ^
# SyntaxError: f-string: unmatched '['
not ok 1 selftests: drivers/net: ping.py # exit=1
make[1]: Leaving directory '/home/virtme/testing-17/tools/testing/selftests/drivers/net'
make: Leaving directory '/home/virtme/testing-17/tools/testing/selftests'
xx__-> echo $?
0
xx__->