diff --git a/testing/btest/Files/mmdb/GeoLite2-ASN.mmdb b/testing/btest/Files/mmdb/GeoLite2-ASN.mmdb
index 65ade5917e..cd464eaed8 100644
Binary files a/testing/btest/Files/mmdb/GeoLite2-ASN.mmdb and b/testing/btest/Files/mmdb/GeoLite2-ASN.mmdb differ
diff --git a/testing/btest/Files/mmdb/GeoLite2-City.mmdb b/testing/btest/Files/mmdb/GeoLite2-City.mmdb
index 2f375e3bd6..6878bb697f 100644
Binary files a/testing/btest/Files/mmdb/GeoLite2-City.mmdb and b/testing/btest/Files/mmdb/GeoLite2-City.mmdb differ
diff --git a/testing/btest/Files/mmdb/README b/testing/btest/Files/mmdb/README
index 269a36c045..640424c852 100644
--- a/testing/btest/Files/mmdb/README
+++ b/testing/btest/Files/mmdb/README
@@ -1,9 +1,10 @@
 These .mmdb databases were created with the mmdbwriter from MaxMind [1] for
 testing purposes. See the main.go file. They only contain information about
-LBL's network ranges:
+the following LBL/Berkeley network ranges:
 
     128.3.0.0/16
     131.243.0.0/16
+    2607:f140::/32
 
 Rebuild with:
 
diff --git a/testing/btest/Files/mmdb/main.go b/testing/btest/Files/mmdb/main.go
index a95d857022..3caa96495a 100644
--- a/testing/btest/Files/mmdb/main.go
+++ b/testing/btest/Files/mmdb/main.go
@@ -44,12 +44,13 @@ func writeDB(fname, name string, record mmdbtype.Map, nets ...*net.IPNet) {
 func main() {
 	_, net1, _ := net.ParseCIDR("128.3.0.0/16")
 	_, net2, _ := net.ParseCIDR("131.243.0.0/16")
+	_, net3, _ := net.ParseCIDR("2607:f140::/32")
 
 	// The ASN record.
 	asnRecord := mmdbtype.Map{}
 	asnRecord["autonomous_system_number"] = mmdbtype.Uint32(16)
 	asnRecord["autonomous_system_organization"] = mmdbtype.String("Lawrence Berkeley National Laboratory")
-	writeDB("GeoLite2-ASN.mmdb", "My-ASN-DB", asnRecord, net1, net2)
+	writeDB("GeoLite2-ASN.mmdb", "My-ASN-DB", asnRecord, net1, net2, net3)
 
 	// The Location record.
 	locRecord := mmdbtype.Map{
@@ -69,5 +70,5 @@ func main() {
 			},
 		},
 	}
-	writeDB("GeoLite2-City.mmdb", "My-City-DB", locRecord, net1, net2)
+	writeDB("GeoLite2-City.mmdb", "My-City-DB", locRecord, net1, net2, net3)
 }