diff --git a/tests/db_sms/db_sms_test.c b/tests/db_sms/db_sms_test.c
index 24c86e5..011bd51 100644
--- a/tests/db_sms/db_sms_test.c
+++ b/tests/db_sms/db_sms_test.c
@@ -519,6 +519,7 @@
 	log_set_use_color(osmo_stderr_target, 0);
 	log_set_print_timestamp(osmo_stderr_target, 0);
 	log_set_print_filename(osmo_stderr_target, 0);
+	log_set_print_category_hex(osmo_stderr_target, 0);
 	log_set_print_category(osmo_stderr_target, 1);
 	log_set_print_level(osmo_stderr_target, 1);
 
diff --git a/tests/msc_vlr/msc_vlr_tests.c b/tests/msc_vlr/msc_vlr_tests.c
index 87d1abd..b311f67 100644
--- a/tests/msc_vlr/msc_vlr_tests.c
+++ b/tests/msc_vlr/msc_vlr_tests.c
@@ -1192,6 +1192,7 @@
 	log_set_print_timestamp(osmo_stderr_target, 0);
 	log_set_print_filename(osmo_stderr_target, 0);
 	log_set_print_category(osmo_stderr_target, 1);
+	log_set_print_category_hex(osmo_stderr_target, 0);
 	log_set_category_filter(osmo_stderr_target, DLSMS, 1, LOGL_DEBUG);
 
 	if (cmdline_opts.verbose) {
diff --git a/tests/smpp/smpp_test.c b/tests/smpp/smpp_test.c
index 1abb63b..b7df653 100644
--- a/tests/smpp/smpp_test.c
+++ b/tests/smpp/smpp_test.c
@@ -81,6 +81,8 @@
 	osmo_init_logging2(ctx, &log_info);
 	log_set_use_color(osmo_stderr_target, 0);
 	log_set_print_filename(osmo_stderr_target, 0);
+	log_set_print_category(osmo_stderr_target, 0);
+	log_set_print_category_hex(osmo_stderr_target, 0);
 
 	test_coding_scheme();
 	return EXIT_SUCCESS;