diff --git a/src/TwigExtension.php b/src/TwigExtension.php
index cd382ab..a54ee10 100644
--- a/src/TwigExtension.php
+++ b/src/TwigExtension.php
@@ -3,7 +3,6 @@
 namespace Drupal\twig_tweak;
 
 use Drupal\Core\Block\TitleBlockPluginInterface;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Site\Settings;
 use Drupal\Core\Url;
 use Drupal\image\Entity\ImageStyle;
@@ -12,8 +11,7 @@ use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 /**
  * Twig extension with some useful functions and filters.
  *
- * As version 1.7 all dependencies are instantiated on demand for performance
- * reasons.
+ * Dependency injection is not used for performance reason.
  */
 class TwigExtension extends \Twig_Extension {
 
@@ -111,7 +109,7 @@ class TwigExtension extends \Twig_Extension {
 
     /* @var $blocks \Drupal\block\BlockInterface[] */
     foreach ($blocks as $id => $block) {
-      if ($this->entityAccess($block)) {
+      if ($block->access('view')) {
         $block_plugin = $block->getPlugin();
         if ($block_plugin instanceof TitleBlockPluginInterface) {
           $request = \Drupal::request();
@@ -138,16 +136,18 @@ class TwigExtension extends \Twig_Extension {
    * @param string $langcode
    *   (optional) For which language the entity should be rendered, defaults to
    *   the current content language.
+   * @param bool $check_access
+   *   (Optional) Indicates that access check is required.
    *
    * @return null|array
    *   A render array for the entity or NULL if the entity does not exist.
    */
-  public function drupalEntity($entity_type, $id = NULL, $view_mode = NULL, $langcode = NULL) {
+  public function drupalEntity($entity_type, $id = NULL, $view_mode = NULL, $langcode = NULL, $check_access = TRUE) {
     $entity_type_manager = \Drupal::entityTypeManager();
     $entity = $id
       ? $entity_type_manager->getStorage($entity_type)->load($id)
       : \Drupal::routeMatch()->getParameter($entity_type);
-    if ($entity && $this->entityAccess($entity)) {
+    if ($entity && (!$check_access || $entity->access('view'))) {
       $render_controller = $entity_type_manager->getViewBuilder($entity_type);
       return $render_controller->view($entity, $view_mode, $langcode);
     }
@@ -166,16 +166,18 @@ class TwigExtension extends \Twig_Extension {
    *   (optional) The view mode that should be used to render the field.
    * @param string $langcode
    *   (optional) Language code to load translation.
+   * @param bool $check_access
+   *   (Optional) Indicates that access check is required.
    *
    * @return null|array
    *   A render array for the field or NULL if the value does not exist.
    */
-  public function drupalField($field_name, $entity_type, $id = NULL, $view_mode = 'default', $langcode = NULL) {
+  public function drupalField($field_name, $entity_type, $id = NULL, $view_mode = 'default', $langcode = NULL, $check_access = TRUE) {
     /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
     $entity = $id
       ? \Drupal::entityTypeManager()->getStorage($entity_type)->load($id)
       : \Drupal::routeMatch()->getParameter($entity_type);
-    if ($entity && $this->entityAccess($entity)) {
+    if ($entity && (!$check_access || $entity->access('view'))) {
       if ($langcode && $entity->hasTranslation($langcode)) {
         $entity = $entity->getTranslation($langcode);
       }
@@ -235,8 +237,7 @@ class TwigExtension extends \Twig_Extension {
    */
   public function drupalForm($form_id) {
     $form_builder = \Drupal::formBuilder();
-    $args = func_get_args();
-    return call_user_func_array([$form_builder, 'getForm'], $args);
+    return call_user_func_array([$form_builder, 'getForm'], func_get_args());
   }
 
   /**
@@ -280,6 +281,9 @@ class TwigExtension extends \Twig_Extension {
 
   /**
    * Dumps information about variables.
+   *
+   * @param mixed $var
+   *   The variable to dump.
    */
   public function drupalDump($var) {
     $var_dumper = '\Symfony\Component\VarDumper\VarDumper';
@@ -294,10 +298,13 @@ class TwigExtension extends \Twig_Extension {
   /**
    * An alias for self::drupalDump().
    *
+   * @param mixed $var
+   *   The variable to dump.
+   *
    * @see \Drupal\twig_tweak\TwigExtension::drupalDump();
    */
-  public function dd() {
-    $this->drupalDump(func_get_args());
+  public function dd($var) {
+    $this->drupalDump($var);
   }
 
   /**
@@ -385,11 +392,6 @@ class TwigExtension extends \Twig_Extension {
    *   The new text if matches are found, otherwise unchanged text.
    */
   public function pregReplaceFilter($text, $pattern, $replacement) {
-    // BC layer. Before version 8.x-1.8 the pattern was without delimiters.
-    // @todo Remove this in Drupal 9.
-    if (strpos($pattern, '/') !== 0) {
-      return preg_replace("/$pattern/", $replacement, $text);
-    }
     return preg_replace($pattern, $replacement, $text);
   }
 
@@ -478,21 +480,4 @@ class TwigExtension extends \Twig_Extension {
     return $output;
   }
 
-  /**
-   * Checks view access to a given entity.
-   *
-   * @param \Drupal\Core\Entity\EntityInterface $entity
-   *   Entity to check access.
-   *
-   * @return bool
-   *   The access check result.
-   *
-   * @todo Remove "check_access" option in 9.x.
-   */
-  protected function entityAccess(EntityInterface $entity) {
-    // Prior version 8.x-1.7 entity access was not checked. The "check_access"
-    // option provides a workaround for possible BC issues.
-    return !Settings::get('twig_tweak_check_access', TRUE) || $entity->access('view');
-  }
-
 }
diff --git a/tests/src/Functional/TwigTweakTest.php b/tests/src/Functional/TwigTweakTest.php
index affcbf9..43bdb2f 100644
--- a/tests/src/Functional/TwigTweakTest.php
+++ b/tests/src/Functional/TwigTweakTest.php
@@ -151,10 +151,6 @@ class TwigTweakTest extends BrowserTestBase {
     $xpath = '//div[@class = "tt-preg-replace" and text() = "FOO-bar"]';
     $this->assertByXpath($xpath);
 
-    // Test preg replacement (legacy).
-    $xpath = '//div[@class = "tt-preg-replace-legacy" and text() = "foo-bar"]';
-    $this->assertByXpath($xpath);
-
     // Test image style.
     $xpath = '//div[@class = "tt-image-style" and contains(text(), "styles/thumbnail/public/images/ocean.jpg")]';
     $this->assertByXpath($xpath);
diff --git a/tests/twig_tweak_test/templates/twig-tweak-test.html.twig b/tests/twig_tweak_test/templates/twig-tweak-test.html.twig
index 07253b6..a46539c 100644
--- a/tests/twig_tweak_test/templates/twig-tweak-test.html.twig
+++ b/tests/twig_tweak_test/templates/twig-tweak-test.html.twig
@@ -37,7 +37,6 @@
   <div class="tt-url">{{ drupal_url('node/1', {absolute: true}) }}</div>
   <div class="tt-token-replace">{{ 'Site name: [site:name]' | token_replace }}</div>
   <div class="tt-preg-replace">{{ 'FOO' | preg_replace('/(foo)/i', '$1-bar') }}</div>
-  <div class="tt-preg-replace-legacy">{{ 'foo' | preg_replace('(foo)', '$1-bar') }}</div>
   <div class="tt-image-style">{{ 'public://images/ocean.jpg' | image_style('thumbnail') }}</div>
   <div class="tt-transliterate">{{ 'Привет!' | transliterate('ru') }}</div>
   <div class="tt-check-markup">{{ '<b>bold</b> <strong>strong</strong>' | check_markup('twig_tweak_test') }}</div>