diff --git a/blockcheck2.d/standard/90-quic.sh b/blockcheck2.d/standard/90-quic.sh
index 35c7f6c..149d36c 100644
--- a/blockcheck2.d/standard/90-quic.sh
+++ b/blockcheck2.d/standard/90-quic.sh
@@ -1,3 +1,5 @@
+. "$TESTDIR/def.inc"
+
 pktws_check_http3()
 {
 	# $1 - test function
@@ -5,7 +7,7 @@ pktws_check_http3()
 
 	[ "$NOTEST_QUIC" = 1 ] && { echo "SKIPPED"; return; }
 
-	local repeats fake pos
+	local repeats fake pos fool
 	local PAYLOAD="--payload quic_initial"
 
 	if [ -n "$FAKE_QUIC" ]; then
@@ -18,6 +20,12 @@ pktws_check_http3()
 		pktws_curl_test_update $1 $2 ${FAKE_QUIC:+--blob=$fake:@"$FAKE_QUIC" }$PAYLOAD --lua-desync=fake:blob=$fake:repeats=$repeats && [ "$SCANLEVEL" != force ] && break
 	done
 
+	[ "$IPV" = 6 ] && {
+		for fool in $FOOLINGS6_UDP; do
+			pktws_curl_test_update $1 $2 $PAYLOAD --lua-desync=send:$fool --lua-desync=drop
+		done
+	}
+
 	for pos in 8 16 32 64; do
 		pktws_curl_test_update $1 $2 $PAYLOAD --lua-desync=send:ipfrag:ipfrag_pos_udp=$pos --lua-desync=drop && [ "$SCANLEVEL" != force ] && break
 	done
diff --git a/blockcheck2.d/standard/def.inc b/blockcheck2.d/standard/def.inc
index 7e17572..5889d53 100644
--- a/blockcheck2.d/standard/def.inc
+++ b/blockcheck2.d/standard/def.inc
@@ -2,6 +2,8 @@ FOOLINGS46_TCP=${FOOLINGS46_TCP:-"tcp_md5 badsum tcp_seq=-3000 tcp_seq=1000000 t
 FOOLINGS6_TCP=${FOOLINGS6_TCP:-"ip6_hopbyhop ip6_hopbyhop:ip6_hopbyhop2 ip6_destopt ip6_routing ip6_ah"}
 FOOLINGS_TCP="$FOOLINGS46_TCP"
 [ "$IPV" = 6 ] && FOOLINGS_TCP="$FOOLINGS_TCP $FOOLINGS6_TCP"
+FOOLINGS6_UDP="${FOOLINGS6_UDP:-$FOOLINGS6_TCP}"
 FOOLINGS_UDP="${FOOLINGS_UDP:-badsum}"
+[ "$IPV" = 6 ] && FOOLINGS_UDP="$FOOLINGS_UDP $FOOLINGS6_UDP"
 
 FAKE_REPEATS=${FAKE_REPEATS:-1}
diff --git a/docs/changes.txt b/docs/changes.txt
index 872e73c..30fb45d 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -118,3 +118,4 @@ v0.7.4
 v0.7.5
 
 * zapret-auto : orchestrator "repeater"
+* blockcheck2: check http3 with ipv6 exthdr