diff --git a/server/core/test/test_utils.hh b/server/core/test/test_utils.hh
index bb1c9644c..532d9e3b5 100644
--- a/server/core/test/test_utils.hh
+++ b/server/core/test/test_utils.hh
@@ -109,6 +109,7 @@ void init_test_env(char* __attribute((unused))path = nullptr, uint32_t init_type
     set_libdir(MXS_STRDUP(old_libdir.c_str()));
 
     preload_module("mariadbclient", "server/modules/protocol/MySQL/mariadbclient/", MODULE_PROTOCOL);
+    preload_module("mariadbbackend", "server/modules/protocol/MySQL/mariadbbackend/", MODULE_PROTOCOL);
     preload_module("readconnroute", "server/modules/routing/readconnroute/", MODULE_ROUTER);
     preload_module("mariadbauth", "server/modules/authenticator/MariaDBAuth/", MODULE_AUTHENTICATOR);
 }