diff --git a/test/box/args.test b/test/box/args.test
index ee893918a0e9dd552d2004cbd274e654dcedf718..75a6752c79b816d74c55c32bbe249699061e04b9 100644
--- a/test/box/args.test
+++ b/test/box/args.test
@@ -4,6 +4,8 @@ import os
 server.test_option("--help")
 server.test_option("-h")
 sys.stdout.push_filter("(/\S+)+/tarantool", "tarantool")
+# Test a cfg-get for something that is not in the config
+# file (used to crash, Bug#748599
 server.test_option("--cfg-get=custom_proc_title")
 server.test_option("-Z")
 server.test_option("--no-such-option")