diff --git a/tests/config.h.in b/tests/config.h.in
index a7a5b7e..5943c07 100644
--- a/tests/config.h.in
+++ b/tests/config.h.in
@@ -3,7 +3,7 @@
  * @author Radek Krejci <rkrejci@cesnet.cz>
  * @brief cmocka tests configuration header.
  *
- * Copyright (c) 2015 - 2018 CESNET, z.s.p.o.
+ * Copyright (c) 2015 - 2098 CESNET, z.s.p.o.
  *
  * This source code is licensed under BSD 3-Clause License (the "License").
  * You may not use this file except in compliance with the License.
@@ -19,4 +19,6 @@
 #define TESTS_SRC "@CMAKE_CURRENT_SOURCE_DIR@"
 #define TESTS_BIN "@CMAKE_CURRENT_BINARY_DIR@"
 
+#define TESTS_DIR_MODULES_YANG TESTS_SRC"/modules/yang"
+
 #endif /* LYTEST_CONFIG_H_ */