diff --git a/core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php b/core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php
index 47c7d2c..e46073c 100644
--- a/core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php
@@ -145,22 +145,22 @@ function testOptionMinDepth() {
   /**
    * Tests file_scan_directory() obeys 'file_scan_ignore_directories' setting.
    */
-  function testIgnoreDirectories() {
+  public function testIgnoreDirectories() {
     $files = file_scan_directory('core/modules/system/tests/fixtures/IgnoreDirectories', '/\.txt$/');
-    $this->assertEqual(2, count($files), '2 text files found when not ignoring directories.');
+    $this->assertCount(2, $files, '2 text files found when not ignoring directories.');
 
-    $this->settingsSet('file_scan_ignore_directories', ['frontend_framework']);
+    $this->setSetting('file_scan_ignore_directories', ['frontend_framework']);
     $files = file_scan_directory('core/modules/system/tests/fixtures/IgnoreDirectories', '/\.txt$/');
-    $this->assertEqual(1, count($files), '1 text files found when ignoring directories called "frontend_framework".');
+    $this->assertCount(1, $files, '1 text files found when ignoring directories called "frontend_framework".');
 
     // Ensure that the directories in file_scan_ignore_directories are escaped
     // using preg_quote.
-    $this->settingsSet('file_scan_ignore_directories', ['frontend.*']);
+    $this->setSetting('file_scan_ignore_directories', ['frontend.*']);
     $files = file_scan_directory('core/modules/system/tests/fixtures/IgnoreDirectories', '/\.txt$/');
-    $this->assertEqual(2, count($files), '2 text files found when ignoring a directory that is not there.');
+    $this->assertCount(2, $files, '2 text files found when ignoring a directory that is not there.');
 
     $files = file_scan_directory('core/modules/system/tests/fixtures/IgnoreDirectories', '/\.txt$/', ['nomask' => '/^something_thing_else$/']);
-    $this->assertEqual(2, count($files), '2 text files found when an "nomasl" option passed in.');
+    $this->assertCount(2, $files, '2 text files found when an "nomask" option passed in.');
   }
 
 }