diff --git a/tests/test_firewall.c b/tests/test_firewall.c
index 8dd55c87..920c8f9d 100644
--- a/tests/test_firewall.c
+++ b/tests/test_firewall.c
@@ -149,6 +149,7 @@ static void test_parser(void) {
 }
 
 static void test_packets(void) {
+    debug_set_category_level(DEBUG_CATEGORY_ROUTING, DEBUG_LEVEL_INFO);
     struct CFG_FIREWALL_RULE rule = {0x0a000001, 443};
     struct global_config cfg = {.firewall_rules = &rule, .firewall_rule_count = 1};
     struct firewall_ctx fw = {0};
@@ -158,10 +159,10 @@ static void test_packets(void) {
         for (size_t ihl = 20; ihl <= 60; ihl += 4) {
             size_t len = packet(data, rule.ip, 443, proto, ihl);
             assert(fw_check_packet(&fw, data, len) == 1);
-            data[ihl + 3] = 80;
+            data[ihl + 2] = 0; data[ihl + 3] = 80;
             assert(fw_check_packet(&fw, data, len) == 0);
             data[ihl] = 1; data[ihl + 1] = 187;
-            assert(fw_check_packet(&fw, data, len) == 0); // source port 443 не разрешает destination 336.
+            assert(fw_check_packet(&fw, data, len) == 0); // source port 443 не разрешает destination 80.
         }
     }
     size_t len = packet(data, rule.ip, 443, 1, 20);
@@ -196,6 +197,7 @@ static void test_packets(void) {
     data[6] = 0x80; assert(fw_check_packet(&fw, data, len) == -1);
     data[6] = 0x20; data[3]--; assert(fw_check_packet(&fw, data, len - 1) == -1);
     fw_free(&fw);
+    debug_set_category_level(DEBUG_CATEGORY_ROUTING, DEBUG_LEVEL_DEBUG);
     DEBUG_INFO(DEBUG_CATEGORY_ROUTING, "[PASS] firewall IPv4 options, TCP/UDP destination, ICMP, fragments and malformed lengths");
 }
 
@@ -203,6 +205,7 @@ static void test_packets(void) {
 static void incoming(struct UTUN_INSTANCE *inst, const uint8_t *data, size_t len) {
     struct ll_entry *entry = ll_alloc_lldgram(ROUTER_SVC_PAYLOAD_OFF + len);
     assert(entry);
+    entry->len = ROUTER_SVC_PAYLOAD_OFF + len;
     uint64_t src = 2;
     entry->dgram[0] = ETCP_RT_ID_DATA;
     memcpy(entry->dgram + ROUTER_SVC_SRC_OFF, &src, sizeof(src));
@@ -270,8 +273,10 @@ static void test_tun(void) {
     assert(!tun_inject_packet(inst.tun, data, len) && sent_packets == 3 && inst.dropped_packets == 6);
     send_result = 0;
     struct ll_entry *invalid = ll_alloc_lldgram(1); assert(invalid);
+    invalid->len = 1;
     assert(!queue_data_put(inst.tun->output_queue, invalid));
     struct ll_entry *short_entry = ll_alloc_lldgram(1); assert(short_entry);
+    short_entry->len = 1;
     route_pkt(&inst, short_entry, 2);
     struct ll_entry *no_instance = ll_alloc_lldgram(1); assert(no_instance);
     route_pkt(NULL, no_instance, 2);