diff --git a/core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php b/core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php
index 13f6f0f..d309c12 100644
--- a/core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php
+++ b/core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php
@@ -225,7 +225,7 @@ public function sqlFunctionRand($seed = NULL) {
   }
 
   /**
-   * SQLite compatbility implementation for the REGEXP SQL operator.
+   * SQLite compatibility implementation for the REGEXP SQL operator.
    *
    * The REGEXP operator is a special syntax for the regexp() user function.
    */
diff --git a/core/modules/system/lib/Drupal/system/Tests/Database/SelectTest.php b/core/modules/system/lib/Drupal/system/Tests/Database/SelectTest.php
index c5704ae..cc67fa1 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Database/SelectTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Database/SelectTest.php
@@ -390,12 +390,12 @@ public function testRegexCondition() {
       ),
     );
     foreach ($test_groups as $test_group) {
-      $query = db_select('test', 't');
+      $query = $this->container->get('database')->select('test', 't');
       $query->addField('t', 'name');
       $query->condition('t.name', $test_group['regex'], 'REGEXP');
       $result = $query->execute()->fetchCol();
 
-      $this->assertEqual(count($result), count($test_group['expected']), 'returns the expected number of rows.');
+      $this->assertEqual(count($result), count($test_group['expected']), 'Returns the expected number of rows.');
       $this->assertEqual(sort($result), sort($test_group['expected']), 'Returns the expected rows.');
     }
   }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php
index eb463ce..42fe4a2 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php
@@ -277,7 +277,7 @@ function op_empty($field) {
    * @param string $field
    *   The expression pointing to the queries field, for example "foo.bar".
    */
-  function op_regex($field) {
+  protected function op_regex($field) {
     $this->query->add_where($this->options['group'], $field, $this->value, 'REGEXP');
   }
 
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
index 24184df..6436d4c 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
@@ -334,7 +334,7 @@ function op_longer($field) {
    * @param string $field
    *   The expression pointing to the queries field, for example "foo.bar".
    */
-  public function op_regex($field) {
+  protected function op_regex($field) {
     $this->query->add_where($this->options['group'], $field, $this->value, 'REGEXP');
   }