build BUGFIX correctly set hidden visibility of shared objects
diff --git a/tests/src/test_tree_schema_helpers.c b/tests/src/test_tree_schema_helpers.c
index 7521a60..580d488 100644
--- a/tests/src/test_tree_schema_helpers.c
+++ b/tests/src/test_tree_schema_helpers.c
@@ -12,7 +12,15 @@
  *     https://opensource.org/licenses/BSD-3-Clause
  */
 
+#include "../../src/common.c"
+#include "../../src/log.c"
+#include "../../src/set.c"
+#include "../../src/parser_yang.c"
+#include "../../src/tree_schema.c"
 #include "../../src/tree_schema_helpers.c"
+#include "../../src/hash_table.c"
+#include "../../src/xpath.c"
+#include "../../src/context.c"
 
 #include <stdarg.h>
 #include <stddef.h>