diff --git a/tests/include/test/psa_exercise_key.h b/tests/include/test/psa_exercise_key.h
index 18333a9372..aa0aeb5afd 100644
--- a/tests/include/test/psa_exercise_key.h
+++ b/tests/include/test/psa_exercise_key.h
@@ -52,30 +52,6 @@
 #undef KNOWN_SUPPORTED_HASH_ALG
 #endif
 
-/** \def KNOWN_MBEDTLS_SUPPORTED_HASH_ALG
- *
- * A hash algorithm that is known to be supported by Mbed TLS APIs.
- *
- * This is used in some smoke tests where the hash algorithm is used as
- * part of another algorithm like a signature algorithm and the hashing is
- * completed through an Mbed TLS hash API, not the PSA one.
- */
-#if defined(MBEDTLS_MD5_C)
-#define KNOWN_MBEDTLS_SUPPORTED_HASH_ALG PSA_ALG_MD5
-/* MBEDTLS_RIPEMD160_C omitted. This is necessary for the sake of
- * exercise_signature_key() because Mbed TLS doesn't support RIPEMD160
- * in RSA PKCS#1v1.5 signatures. A RIPEMD160-only configuration would be
- * implausible anyway. */
-#elif defined(MBEDTLS_SHA1_C)
-#define KNOWN_MBEDTLS_SUPPORTED_HASH_ALG PSA_ALG_SHA_1
-#elif defined(MBEDTLS_SHA256_C)
-#define KNOWN_MBEDTLS_SUPPORTED_HASH_ALG PSA_ALG_SHA_256
-#elif defined(MBEDTLS_SHA512_C)
-#define KNOWN_MBEDTLS_SUPPORTED_HASH_ALG PSA_ALG_SHA_512
-#else
-#undef KNOWN_MBEDLTS_SUPPORTED_HASH_ALG
-#endif
-
 /** \def KNOWN_SUPPORTED_BLOCK_CIPHER
  *
  * A block cipher that is known to be supported.