Anti-Test for ICMP dropping on tor_enforcement fails

On my computer, one scenario seems to be consistently failing on stable branch

 Scenario: Anti test: Detecting ICMP leaks of ping with the firewall leak detector # features/tor_enforcement.feature:38                                                                   
   Given I have started Tails from DVD and logged in and the network is connected  # features/step_definitions/snapshots.rb:200                                                            
   And I capture all network traffic                                               # features/step_definitions/common_steps.rb:112                                                         
   And I disable Tails' firewall                                                   # features/step_definitions/firewall_leaks.rb:7                                                         
   When I send some ICMP pings                                                     # features/step_definitions/firewall_leaks.rb:30                                                        
     Failed to ping 208.67.222.222:
     .
     <false> is not true. (Test::Unit::AssertionFailedError)
     ./features/step_definitions/firewall_leaks.rb:33:in `/^I send some ICMP pings$/'
     features/tor_enforcement.feature:42:in `When I send some ICMP pings'
   Then the firewall leak detector has detected leaks                              # features/step_definitions/firewall_leaks.rb:1                                                         

It is not failing on jenkins!

I'm attaching the journal log to inspect it. I have the impression that ping is blocked not only because of the firewall, but also in some other way, since there is some Operation not permitted in the log. But that won't explain why the bug is apparently only happening to me.

00_05_54_Anti_test__Detecting_ICMP_leaks_of_ping_with_the_firewall_leak_detector.journal