diff --git a/tests/bluetooth/bsim_bt/bsim_test_advx/src/main.c b/tests/bluetooth/bsim_bt/bsim_test_advx/src/main.c
index 2589ff6b559..82a4880ff55 100644
--- a/tests/bluetooth/bsim_bt/bsim_test_advx/src/main.c
+++ b/tests/bluetooth/bsim_bt/bsim_test_advx/src/main.c
@@ -341,6 +341,8 @@ static void test_advx_main(void)
 	printk("success.\n");
 
 	printk("Start advertising...");
+	ext_adv_param.timeout = 0;
+	ext_adv_param.num_events = 0;
 	err = bt_le_ext_adv_start(adv, &ext_adv_param);
 	if (err) {
 		goto exit;