diff --git a/tests/test_etcp_two_instances.c b/tests/test_etcp_two_instances.c
index 8337f221..2003fd00 100644
--- a/tests/test_etcp_two_instances.c
+++ b/tests/test_etcp_two_instances.c
@@ -119,6 +119,9 @@ static void test_timeout(void* arg) {
 int main() {
     printf("=== ETCP Two-Instance Connection Test ===\n\n");
     
+    // Explicitly disable TUN initialization for this test
+    utun_instance_set_tun_init_enabled(0);
+    
     // Create server instance
     printf("Creating server instance...\n");
     struct UASYNC* server_ua = uasync_create();