diff --git a/mysql-test/include/default_my.cnf b/mysql-test/include/default_my.cnf
index d102c9020cc..a1c427fe12c 100644
--- a/mysql-test/include/default_my.cnf
+++ b/mysql-test/include/default_my.cnf
@@ -33,3 +33,4 @@ disable-force-if-open
 [ENV]
 MASTER_MYPORT=           @mysqld.1.port
 MASTER_MYSOCK=           @mysqld.1.socket
+OPENSSL_ENABLE_SHA1_SIGNATURES= 1