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..7520c3a35f
--- /dev/null
+++ b/bin/tests/system/tcp/1996-alloc_dnsbuf-crash-test.pkt
@@ -0,0 +1,12 @@
+# Transaction ID
+0001
+# Standard query
+0000
+# Questions: 1, Additional: 1
+0001 0000 0000 0000
+# QNAME: www.isc.org
+03 697363 03 6F7267 00
+# Type: AXFR
+00fc
+# Class: IN
+0001
diff --git a/bin/tests/system/tcp/tests.sh b/bin/tests/system/tcp/tests.sh
index af92b95d74..20d72c610a 100644
--- a/bin/tests/system/tcp/tests.sh
+++ b/bin/tests/system/tcp/tests.sh
@@ -186,7 +186,7 @@ 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 "${PORT}" -t udp 1996-alloc_dnsbuf-crash-test.pkt || ret=1
+$PERL ../packet.pl -a "10.53.0.1" -p "${PORT}" -t tcp -r 300000 1996-alloc_dnsbuf-crash-test.pkt || ret=1
 dig_with_opts +tcp @10.53.0.1 txt.example > dig.out.test$n || ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
 status=$((status + ret))