diff --git a/tests/compat.sh b/tests/compat.sh
index 09ce03d..dddf2ab 100755
--- a/tests/compat.sh
+++ b/tests/compat.sh
@@ -73,11 +73,9 @@
 FILTER=""
 # exclude:
 # - NULL: excluded from our default config
-#   avoid plain DES but keep 3DES-EDE-CBC (mbedTLS), DES-CBC3 (OpenSSL)
-# - ARIA: not in default mbedtls_config.h + requires OpenSSL >= 1.1.1
+# - ARIA: requires OpenSSL >= 1.1.1
 # - ChachaPoly: requires OpenSSL >= 1.1.0
-# - 3DES: not in default config
-EXCLUDE='NULL\|DES\|ARIA\|CHACHA20-POLY1305'
+EXCLUDE='NULL\|ARIA\|CHACHA20-POLY1305'
 VERBOSE=""
 MEMCHECK=0
 PEERS="OpenSSL$PEER_GNUTLS mbedTLS"