diff --git a/testing/btest/Baseline/core.unknown-protocol-event/out b/testing/btest/Baseline/core.unknown-protocol-event/out
index 0cdfa29213..7f9b60fb5d 100644
--- a/testing/btest/Baseline/core.unknown-protocol-event/out
+++ b/testing/btest/Baseline/core.unknown-protocol-event/out
@@ -1,2 +1,2 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
-ETHERNET, 35020, 02070400222d81db1004
+ETHERNET, 35020, 02070400222d81db1004, [ETHERNET]
diff --git a/testing/btest/Baseline/core.vntag/unknown_protocols.log b/testing/btest/Baseline/core.vntag/unknown_protocols.log
index c7ddb819f3..e0e8fa8956 100644
--- a/testing/btest/Baseline/core.vntag/unknown_protocols.log
+++ b/testing/btest/Baseline/core.vntag/unknown_protocols.log
@@ -5,9 +5,9 @@
 #unset_field	-
 #path	unknown_protocols
 #open XXXX-XX-XX-XX-XX-XX
-#fields	ts	analyzer	protocol_id	first_bytes
-#types	time	string	string	string
-XXXXXXXXXX.XXXXXX	IP	0xfd	1b794b175fac06aba658
-XXXXXXXXXX.XXXXXX	IP	0xfd	9d6c1f9e20274bb66385
-XXXXXXXXXX.XXXXXX	IP	0xfd	06ffb64ded001f65f818
+#fields	ts	analyzer	protocol_id	first_bytes	analyzer_history
+#types	time	string	string	string	vector[string]
+XXXXXXXXXX.XXXXXX	IP	0xfd	1b794b175fac06aba658	ETHERNET,VNTAG,VLAN,IP
+XXXXXXXXXX.XXXXXX	IP	0xfd	9d6c1f9e20274bb66385	ETHERNET,VNTAG,VLAN,IP
+XXXXXXXXXX.XXXXXX	IP	0xfd	06ffb64ded001f65f818	ETHERNET,VNTAG,VLAN,IP
 #close XXXX-XX-XX-XX-XX-XX
diff --git a/testing/btest/Baseline/plugins.packet-protocol/output_orig b/testing/btest/Baseline/plugins.packet-protocol/output_orig
index 7a832e4072..b60ee2f067 100644
--- a/testing/btest/Baseline/plugins.packet-protocol/output_orig
+++ b/testing/btest/Baseline/plugins.packet-protocol/output_orig
@@ -5,7 +5,7 @@
 #unset_field	-
 #path	unknown_protocols
 #open XXXX-XX-XX-XX-XX-XX
-#fields	ts	analyzer	protocol_id	first_bytes
-#types	time	string	string	string
-XXXXXXXXXX.XXXXXX	ETHERNET	0x88b5	4920616d20656e636170
+#fields	ts	analyzer	protocol_id	first_bytes	analyzer_history
+#types	time	string	string	string	vector[string]
+XXXXXXXXXX.XXXXXX	ETHERNET	0x88b5	4920616d20656e636170	ETHERNET
 #close XXXX-XX-XX-XX-XX-XX
diff --git a/testing/btest/core/unknown-protocol-event.zeek b/testing/btest/core/unknown-protocol-event.zeek
index c043217da4..ba49a28c16 100644
--- a/testing/btest/core/unknown-protocol-event.zeek
+++ b/testing/btest/core/unknown-protocol-event.zeek
@@ -1,6 +1,9 @@
 # @TEST-EXEC: zeek -b -r $TRACES/lldp.pcap %INPUT >out
 # @TEST-EXEC: btest-diff out
 
-event unknown_protocol(analyzer_name: string, protocol: count, first_bytes: string)
-	{ print analyzer_name, protocol, bytestring_to_hexstr(first_bytes); }
-
+event unknown_protocol(analyzer_name: string, protocol: count, first_bytes: string,
+	analyzer_history: string_vec)
+	{
+	print analyzer_name, protocol, bytestring_to_hexstr(first_bytes),
+		analyzer_history;
+	}