diff -up Net-Ping-2.74/t/200_ping_tcp.t.orig Net-Ping-2.74/t/200_ping_tcp.t
--- Net-Ping-2.74/t/200_ping_tcp.t.orig	2020-12-03 12:50:50.645715613 +0100
+++ Net-Ping-2.74/t/200_ping_tcp.t	2020-12-03 12:53:14.305039861 +0100
@@ -1,8 +1,8 @@
 use strict;
 
 BEGIN {
-  if ($ENV{PERL_CORE}) {
-    unless ($ENV{PERL_TEST_Net_Ping}) {
+  if ($ENV{NO_NETWORK_TESTING} ||
+      ($ENV{PERL_CORE} && !$ENV{PERL_TEST_Net_Ping})) {
       print "1..0 # Skip: network dependent test\n";
         exit;
     }