diff --git a/tests/gsup/gsup_test.c b/tests/gsup/gsup_test.c
index f34ac7a..f84072c 100644
--- a/tests/gsup/gsup_test.c
+++ b/tests/gsup/gsup_test.c
@@ -752,6 +752,7 @@
 	log_set_print_filename(osmo_stderr_target, 0);
 	log_set_print_timestamp(osmo_stderr_target, 0);
 	log_set_use_color(osmo_stderr_target, 0);
+	log_set_print_category_hex(osmo_stderr_target, 0);
 	log_set_print_category(osmo_stderr_target, 1);
 
 	test_gsup_messages_dec_enc();