--- a/t/net.t
+++ b/t/net.t
@@ -54,9 +54,15 @@
   my @rbl;
   $rbl[0] = "dnsbltest.spamassassin.org";
   my $relayip = "144.137.3.98";
-  detect_and_load_perl_modules();
-  my $res = relay_is_blacklisted_multi($relayip, 10, 1, \@rbl);
-  is($res->{"dnsbltest.spamassassin.org"}[0], "127.0.0.2");
+
+  SKIP: {
+    if ( (not defined $ENV{'NET_TEST'}) or ($ENV{'NET_TEST'} ne 'yes' )) {
+      skip "Net test disabled", 1
+    }
+    detect_and_load_perl_modules();
+    my $res = relay_is_blacklisted_multi($relayip, 10, 1, \@rbl);
+    is($res->{"dnsbltest.spamassassin.org"}[0], "127.0.0.2");
+  }
 }
 
 __PACKAGE__->runtests();