PathAliasTest is using the RandomGeneratorTrait causing unnecessary output in the testbot logs

We're getting

20:08:46 Drupal\system\Tests\Path\AliasTest                            52 passes                                      
20:08:49 Drupal\KernelTests\Core\Path\AliasStorageTest                  4 passes                                      
20:08:50 PHP Strict Standards:  Drupal\simpletest\TestBase and Drupal\simpletest\RandomGeneratorTrait define the same property ($randomGenerator) in the composition of Drupal\path\Tests\PathAliasTest. This might be incompatible, to improve maintainability consider using accessor methods in traits instead. Class was composed in /var/www/html/core/modules/path/src/Tests/PathAliasTest.php on line 354
20:08:50 
20:08:50 Strict Standards: Drupal\simpletest\TestBase and Drupal\simpletest\RandomGeneratorTrait define the same property ($randomGenerator) in the composition of Drupal\path\Tests\PathAliasTest. This might be incompatible, to improve maintainability consider using accessor methods in traits instead. Class was composed in /var/www/html/core/modules/path/src/Tests/PathAliasTest.php on line 354
20:08:50 Drupal\node\Tests\NodeRevisionsAllTest                        49 passes                                      
20:08:50 Drupal\path\Tests\Migrate\d7\MigrateUrlAliasTest               7 passes                                      
20:08:52 Drupal\options\Tests\OptionsDynamicValuesApiTest               3 passes        

in our test logs. We shouldn't be. See https://dispatcher.drupalci.org/job/default/37177/consoleFull.

The test is still running though so this is not a bug.