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;

     }