https://bz.apache.org/SpamAssassin/show_bug.cgi?id=8095
--- a/t/dnsbl_subtests.t
+++ b/t/dnsbl_subtests.t
@@ -20,6 +20,10 @@
 
 use Mail::SpamAssassin;
 
+tstpre ("
+  loadplugin Mail::SpamAssassin::Plugin::URIDNSBL
+");
+
 # Bug 5761 (no 127.0.0.1 in jail, use SPAMD_LOCALHOST if specified)
 my $dns_server_localaddr = $ENV{'SPAMD_LOCALHOST'};
 if (!$dns_server_localaddr) {