diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 2b1a3e9..2d65760 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1230,8 +1230,9 @@
     scripts/config.py unset MBEDTLS_PKCS7_C
     # Disable indirect dependencies of MD
     scripts/config.py unset MBEDTLS_ECDSA_DETERMINISTIC # needs HMAC_DRBG
-    # Enable "light" subset of MD
-    make CFLAGS="$ASAN_CFLAGS -DMBEDTLS_MD_LIGHT" LDFLAGS="$ASAN_CFLAGS"
+    # Note: MD-light is auto-enabled in build_info.h by modules that need it,
+    # which we haven't disabled, so no need to explicitly enable it.
+    make CFLAGS="$ASAN_CFLAGS" LDFLAGS="$ASAN_CFLAGS"
 
     # Make sure we don't have the HMAC functions, but the hashing functions
     not grep mbedtls_md_hmac library/md.o