diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 85fadf4..88d7414 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -2910,8 +2910,6 @@
     # - ASN1_[PARSE/WRITE]_C found by check_config.h for pkparse/pkwrite
     echo "#define MBEDTLS_ASN1_PARSE_C" >> "$CONFIG_H"
     echo "#define MBEDTLS_ASN1_WRITE_C" >> "$CONFIG_H"
-    # - MD_C for HKDF_C
-    echo "#define MBEDTLS_MD_C" >> "$CONFIG_H"
 
     # Config adjustments for better test coverage in our environment.
     # These are not needed just to build and pass tests.