default or selected kernelversion does not have config value CONFIG_CRYPTO_LIB_MD5_KUNIT_TEST.
Result is shown for kernelversion 6.18-rc3

KUnit tests for MD5

modulename: md5_kunit.ko

configname: CONFIG_CRYPTO_LIB_MD5_KUNIT_TEST

Linux Kernel Configuration
└─>Library routines
└─>Crypto library routines
└─>KUnit tests for MD5
KUnit tests for the MD5 cryptographic hash function and its
corresponding HMAC.

source code:
lib/crypto//tests/md5_kunit.c

depends
CONFIG_KUNIT