diff --git a/bin/tests/system/tcp/1996-alloc_dnsbuf-crash-test.pkt b/bin/tests/system/tcp/1996-alloc_dnsbuf-crash-test.pkt
new file mode 100644
index 0000000000..b723cef1d9
Binary files /dev/null and b/bin/tests/system/tcp/1996-alloc_dnsbuf-crash-test.pkt differ
diff --git a/bin/tests/system/tcp/tests.sh b/bin/tests/system/tcp/tests.sh
index 0f4deb8e37..af92b95d74 100644
--- a/bin/tests/system/tcp/tests.sh
+++ b/bin/tests/system/tcp/tests.sh
@@ -183,5 +183,13 @@ grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
 status=$((status + ret))
 
+n=$((n + 1))
+echo_i "checking that BIND 9 doesn't crash on long TCP messages ($n)"
+ret=0
+$PERL ../packet.pl -a "10.53.0.1" -p "${PORT}" -t udp 1996-alloc_dnsbuf-crash-test.pkt || ret=1
+dig_with_opts +tcp @10.53.0.1 txt.example > dig.out.test$n || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
 echo_i "exit status: $status"
 [ $status -eq 0 ] || exit 1
diff --git a/util/copyrights b/util/copyrights
index 663e53a7df..b27720e05a 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -846,6 +846,7 @@
 ./bin/tests/system/synthfromdnssec/ns1/sign.sh	SH	2017,2018,2019,2020
 ./bin/tests/system/synthfromdnssec/setup.sh	SH	2017,2018,2019,2020
 ./bin/tests/system/synthfromdnssec/tests.sh	SH	2017,2018,2019,2020
+./bin/tests/system/tcp/1996-alloc_dnsbuf-crash-test.pkt	X	2020
 ./bin/tests/system/tcp/ans6/ans.py		PYTHON	2019,2020
 ./bin/tests/system/tcp/clean.sh			SH	2014,2016,2018,2019,2020
 ./bin/tests/system/tcp/setup.sh			SH	2018,2019,2020