diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 9c9cf46..6e8a61d 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -1948,6 +1948,8 @@
             -C "! mbedtls_ssl_handshake returned" \
             -S "X509 - Certificate verification failed"
 
+# The "max_int chain" tests assume that MAX_INTERMEDIATE_CA is set to its
+# default value (8)
 run_test    "Authentication: server max_int chain, client default" \
             "$P_SRV crt_file=data_files/dir-maxpath/c09.pem \
                     key_file=data_files/dir-maxpath/09.key" \