diff --git a/core/lib/Drupal/Core/Cache/DatabaseBackend.php b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
index 8f9cb44..e7d4191 100644
--- a/core/lib/Drupal/Core/Cache/DatabaseBackend.php
+++ b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
@@ -60,7 +60,7 @@ class DatabaseBackend implements CacheBackendInterface {
    * @param array $configuration
    *   The maximum cache expiration time.
    */
-  public function __construct(Connection $connection, CacheTagsChecksumInterface $checksum_provider, $bin, $configuration = array()) {
+  public function __construct(Connection $connection, CacheTagsChecksumInterface $checksum_provider, $bin, array $configuration = []) {
     // All cache tables should be prefixed with 'cache_'.
     $bin = 'cache_' . $bin;
 
diff --git a/core/modules/system/src/Tests/Cache/DatabaseBackendUnitTest.php b/core/modules/system/src/Tests/Cache/DatabaseBackendUnitTest.php
index 434d53d..0ea40d2 100644
--- a/core/modules/system/src/Tests/Cache/DatabaseBackendUnitTest.php
+++ b/core/modules/system/src/Tests/Cache/DatabaseBackendUnitTest.php
@@ -54,19 +54,19 @@ public function testSetGet() {
   }
 
   public function testCacheBinExpiration(){
-    $configuration = array('max_expire' => 2800);
+    $configuration = ['max_expire' => 2800];
     $backend = new DatabaseBackend($this->container->get('database'), $this->container->get('cache_tags.invalidator.checksum'), 'render', $configuration);
     $backend->set('test_cache1', 'foo');
     $cached = $backend->get('test_cache1', true);
     $this->assertIdentical($cached->expire, (string) (REQUEST_TIME + 2800), 'Maximum cache expire time is correct.');
 
-    $configuration = array('max_expire' => 2799);
+    $configuration = ['max_expire' => 2799];
     $backend = new DatabaseBackend($this->container->get('database'), $this->container->get('cache_tags.invalidator.checksum'), 'render', $configuration);
     $backend->set('test_cache1', 'foo');
     $cached = $backend->get('test_cache1', true);
     $this->assertIdentical($cached->expire, (string) (REQUEST_TIME + 2799), 'Maximum cache expire time is correct.');
 
-    $configuration = array('max_expire' => 2801);
+    $configuration = ['max_expire' => 2801];
     $backend = new DatabaseBackend($this->container->get('database'), $this->container->get('cache_tags.invalidator.checksum'), 'render', $configuration);
     $backend->set('test_cache1', 'foo');
     $cached = $backend->get('test_cache1', true);