PHPUnit Test asserting logging broken

Noticed this in the log output:

Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'line' at row 3: INSERT INTO {simpletest} (test_id, test_class, status, message, message_group, function, line, file) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7), (:db_insert_placeholder_8, :db_insert_placeholder_9, :db_insert_placeholder_10, :db_insert_placeholder_11, :db_insert_placeholder_12, :db_insert_placeholder_13, :db_insert_placeholder_14, :db_insert_placeholder_15), (:db_insert_placeholder_16, :db_insert_placeholder_17, :db_insert_placeholder_18, :db_insert_placeholder_19, :db_insert_placeholder_20, :db_insert_placeholder_21, :db_insert_placeholder_22, :db_insert_placeholder_23), (:db_insert_placeholder_24, :db_insert_placeholder_25, :db_insert_placeholder_26, :db_insert_placeholder_27, :db_insert_placeholder_28, :db_insert_placeholder_29, :db_insert_placeholder_30, :db_insert_placeholder_31); Array
(
    [:db_insert_placeholder_0] => 828
    [:db_insert_placeholder_1] => Drupal\Tests\Component\PhpStorage\FileStorageTest
    [:db_insert_placeholder_2] => pass
    [:db_insert_placeholder_3] =>
    [:db_insert_placeholder_4] => Other
    [:db_insert_placeholder_5] => Drupal\Tests\Component\PhpStorage\FileStorageTest->testCRUD()
    [:db_insert_placeholder_6] => 42
    [:db_insert_placeholder_7] => /var/lib/drupaltestbot/sites/default/files/checkout/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
    [:db_insert_placeholder_8] => 828
    [:db_insert_placeholder_9] => Drupal\Tests\Component\PhpStorage\FileStorageTest
    [:db_insert_placeholder_10] => pass
    [:db_insert_placeholder_11] =>
    [:db_insert_placeholder_12] => Other
    [:db_insert_placeholder_13] => Drupal\Tests\Component\PhpStorage\FileStorageTest->testReadOnly()
    [:db_insert_placeholder_14] => 51
    [:db_insert_placeholder_15] => /var/lib/drupaltestbot/sites/default/files/checkout/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
    [:db_insert_placeholder_16] => 828
    [:db_insert_placeholder_17] =>
    [:db_insert_placeholder_18] => pass
    [:db_insert_placeholder_19] =>
    [:db_insert_placeholder_20] => Other
    [:db_insert_placeholder_21] => ->Drupal\Tests\Component\Utility\StringTest::testCheckPlain()
    [:db_insert_placeholder_22] =>
    [:db_insert_placeholder_23] =>
    [:db_insert_placeholder_24] => 828
    [:db_insert_placeholder_25] =>
    [:db_insert_placeholder_26] => pass
    [:db_insert_placeholder_27] =>
    [:db_insert_placeholder_28] => Other
    [:db_insert_placeholder_29] => ->Drupal\Tests\Component\Utility\StringTest::testFormat()
    [:db_insert_placeholder_30] =>
    [:db_insert_placeholder_31] =>
)
 in Drupal\Core\Database\Connection->query() (line 554 of /var/lib/drupaltestbot/sites/default/files/checkout/core/lib/Drupal/Core/Database/Connection.php).].