diff -u b/core/modules/system/src/Tests/Batch/PageTest.php b/core/modules/system/src/Tests/Batch/PageTest.php
--- b/core/modules/system/src/Tests/Batch/PageTest.php
+++ b/core/modules/system/src/Tests/Batch/PageTest.php
@@ -18,7 +18,7 @@
    *
    * @var array
    */
-  public static $modules = array('batch_test');
+  public static $modules = array('error_service_test', 'batch_test');
 
   /**
    * Tests that the batch API progress page uses the correct theme.
@@ -77,6 +77,7 @@
    * Tests that batch queue was wrongly implemented.
    */
   public function testWrongQueueImplementation() {
+    $this->drupalGet('batch-test/test-wrong-queue');
     $this->assertErrorLogged('Batch queue "' . DatabaseQueue::class . '" is not implements "' . BatchQueueInterface::class . '" interface.');
   }
 
only in patch2:
unchanged:
--- a/core/modules/simpletest/src/TestBase.php
+++ b/core/modules/simpletest/src/TestBase.php
@@ -808,7 +808,7 @@ protected function assertIdenticalObject($object1, $object2, $message = '', $gro
   protected function assertNoErrorsLogged() {
     // Since PHP only creates the error.log file when an actual error is
     // triggered, it is sufficient to check whether the file exists.
-    return $this->assertFalse(file_exists(DRUPAL_ROOT . '/' . $this->siteDirectory . '/error.log'), 'PHP error.log is empty.');
+    return $this->assertFalse(file_exists(ini_get('error_log')), 'PHP error.log is empty.');
   }
 
   /**
@@ -821,30 +821,32 @@ protected function assertNoErrorsLogged() {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    *
    * @see \Drupal\simpletest\TestBase::prepareEnvironment()
-   * @see \Drupal\Core\DrupalKernel::bootConfiguration()
+   * @see \Drupal\Core\DrupalKernel::bootEnvironment()
    */
   protected function assertErrorLogged($error_message) {
-    $error_log_filename = DRUPAL_ROOT . '/' . $this->siteDirectory . '/error.log';
-    if (!file_exists($error_log_filename)) {
-      $this->error('No error logged yet.');
-    }
+    $error_log_filename = ini_get('error_log');
+    // We iterate over the rows in order to be able to remove the logged
+    // errors afterwards.
+    $found = FALSE;
 
-    $content = file_get_contents($error_log_filename);
-    $rows = explode(PHP_EOL, $content);
+    if (file_exists($error_log_filename)) {
+      $content = file_get_contents($error_log_filename);
+      $rows = explode(PHP_EOL, $content);
 
-    // We iterate over the rows in order to be able to remove the logged error
-    // afterwards.
-    $found = FALSE;
-    foreach ($rows as $row_index => $row) {
-      if (strpos($content, $error_message) !== FALSE) {
-        $found = TRUE;
-        unset($rows[$row_index]);
+      foreach ($rows as $row_index => $row) {
+        if (strpos($content, $error_message) !== FALSE) {
+          $found = TRUE;
+          unset($rows[$row_index]);
+        }
       }
-    }
 
-    file_put_contents($error_log_filename, implode("\n", $rows));
+      file_put_contents($error_log_filename, implode("\n", $rows));
+    }
+    else {
+      $this->error('No error logged yet.');
+    }
 
-    return $this->assertTrue($found, sprintf('The %s error message was logged.', $error_message));
+    return $this->assertTrue($found, sprintf('The "%s" error message was logged.', $error_message));
   }
 
   /**
only in patch2:
unchanged:
--- a/core/modules/system/tests/modules/batch_test/batch_test.routing.yml
+++ b/core/modules/system/tests/modules/batch_test/batch_test.routing.yml
@@ -85,3 +85,10 @@ batch_test.test_title:
     _controller: '\Drupal\batch_test\Controller\BatchTestController::testTitleBatch'
   requirements:
     _access: 'TRUE'
+
+batch_test.test_wrong_queue:
+  path: '/batch-test/test-wrong-queue'
+  defaults:
+    _controller: '\Drupal\batch_test\Controller\BatchTestController::testWrongQueueImplementation'
+  requirements:
+    _access: 'TRUE'