tests DOC doxygen header
diff --git a/tests/utests/basic/test_json.c b/tests/utests/basic/test_json.c
index 2778f7b..e6774d4 100644
--- a/tests/utests/basic/test_json.c
+++ b/tests/utests/basic/test_json.c
@@ -1,4 +1,4 @@
-/*
+/**
  * @file test_json.c
  * @author: Radek Krejci <rkrejci@cesnet.cz>
  * @brief unit tests for a generic JSON parser