public static $modules = ['node', 'drupalcon']; // end code

// start output
E                                                                   1 / 1 (100%)

Time: 00:01.906, Memory: 6.00 MB

There was 1 error:

1) Drupal\Tests\drupalcon\Functional\BlogPageTest::it_loads_the_blog_page
Behat\Mink\Exception\ExpectationException:
Current response status code is 500, but 200 expected.
// end output

/app/vendor/behat/mink/src/WebAssert.php:794
/app/vendor/behat/mink/src/WebAssert.php:130
/app/web/modules/custom/drupalcon/tests/src/BlogPageTest.php:17
/app/vendor/phpunit/phpunit/src/Framework/TestResult.php:728

ERRORS!
Tests: 1, Assertions: 3, Errors: 1.