Fix "fsockopen(): Unable to connect to hostname:0" warning

[staabm]

another try at fixing #5779 (comment)

after looking a bit into it, it seems that phpunit will only fail a test when a warning is triggered from the test itself, but not the dataprovider.. intentional?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.18%. Comparing base (484cacc) to head (7900ad8).

Additional details and impacted files

@@            Coverage Diff            @@
##               10.5    #5783   +/-   ##
=========================================
  Coverage     90.18%   90.18%           
  Complexity     6434     6434           
=========================================
  Files           679      679           
  Lines         19531    19531           
=========================================
  Hits          17614    17614           
  Misses         1917     1917           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sebastianbergmann]

it seems that phpunit will only fail a test when a warning is triggered from the test itself

This is similar to #5775.