diff --git a/phalcon/DataMapper/Query/AbstractConditions.zep b/phalcon/DataMapper/Query/AbstractConditions.zep
index 6572eec9adc..82e1f12588e 100644
--- a/phalcon/DataMapper/Query/AbstractConditions.zep
+++ b/phalcon/DataMapper/Query/AbstractConditions.zep
@@ -270,7 +270,6 @@ abstract class AbstractConditions extends AbstractQuery
      *
      * @return string
      */
-
     protected function buildLimitCommon() -> string
     {
         string limit = "";
diff --git a/phalcon/Db/Adapter/AbstractAdapter.zep b/phalcon/Db/Adapter/AbstractAdapter.zep
index fbb6e1a020c..2927f57b824 100644
--- a/phalcon/Db/Adapter/AbstractAdapter.zep
+++ b/phalcon/Db/Adapter/AbstractAdapter.zep
@@ -291,8 +291,15 @@ abstract class AbstractAdapter implements AdapterInterface, EventsAwareInterface
      * // Next SQL sentence is generated
      * DELETE FROM `robots` WHERE `id` = 101
      * ```
+     *
+     * @param array|string
+     * @param string|null whereCondition
+     * @param array placeholders
+     * @param array dataTypes
+     *
+     * @return bool
      */
-    public function delete(var table, var whereCondition = null, var placeholders = null, var dataTypes = null) -> bool
+    public function delete(var table, string whereCondition = null, array placeholders = [], array dataTypes = []) -> bool
     {
         var sql, escapedTable;
 
diff --git a/phalcon/Db/Adapter/AdapterInterface.zep b/phalcon/Db/Adapter/AdapterInterface.zep
index 4ad8aeaeee3..a8bff191534 100644
--- a/phalcon/Db/Adapter/AdapterInterface.zep
+++ b/phalcon/Db/Adapter/AdapterInterface.zep
@@ -87,8 +87,15 @@ interface AdapterInterface
 
     /**
      * Deletes data from a table using custom RDBMS SQL syntax
+     *
+     * @param array|string
+     * @param string|null whereCondition
+     * @param array placeholders
+     * @param array dataTypes
+     *
+     * @return bool
      */
-    public function delete(var table, whereCondition = null, placeholders = null, dataTypes = null) -> bool;
+    public function delete(var table, string whereCondition = null, array placeholders = [], array dataTypes = []) -> bool;
 
     /**
      * Returns an array of Phalcon\Db\Column objects describing a table
diff --git a/tests/database/Db/Adapter/Pdo/DeleteCest.php b/tests/database/Db/Adapter/Pdo/DeleteCest.php
new file mode 100644
index 00000000000..c438338543f
--- /dev/null
+++ b/tests/database/Db/Adapter/Pdo/DeleteCest.php
@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * This file is part of the Phalcon Framework.
+ *
+ * (c) Phalcon Team <team@phalcon.io>
+ *
+ * For the full copyright and license information, please view the LICENSE.txt
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types = 1);
+
+namespace Phalcon\Test\Database\Db\Adapter\Pdo;
+
+use DatabaseTester;
+use Phalcon\Test\Fixtures\Migrations\InvoicesMigration;
+use Phalcon\Test\Fixtures\Traits\DiTrait;
+use Phalcon\Test\Models\Invoices;
+
+final class DeleteCest
+{
+    use DiTrait;
+
+    public function _before(DatabaseTester $I)
+    {
+        $this->setNewFactoryDefault();
+        $this->setDatabase($I);
+    }
+
+    /**
+     * Tests Phalcon\Db\Adapter\AbstractAdapter :: delete()
+     *
+     * @author Phalcon Team <team@phalcon.io>
+     * @since 2021-05-10
+     *
+     * @group  pgsql
+     * @group  mysql
+     * @group  sqlite
+     */
+    public function dbAdapterPdoQuery(DatabaseTester $I)
+    {
+        $I->wantToTest('Db\Adapter\Pdo - delete()');
+
+        $connection = $I->getConnection();
+        $db         = $this->container->get('db');
+
+        $migration = new InvoicesMigration($connection);
+        $migration->insert(1, 1, 1, 'title 1', 101);
+        $migration->insert(2, 1, 1, 'title 2', 102);
+        $migration->insert(3, 1, 1, 'title 3', 103);
+
+        $I->assertSame(3, Invoices::count());
+
+        $db->delete($migration->getTable(), 'inv_id > :id', [
+            'id' => 1,
+        ]);
+
+        $I->assertSame(1, Invoices::count());
+    }
+}
diff --git a/tests/database/Db/Adapter/Pdo/QueryCest.php b/tests/database/Db/Adapter/Pdo/QueryCest.php
index 2e4367fe768..cebf6be0e0c 100644
--- a/tests/database/Db/Adapter/Pdo/QueryCest.php
+++ b/tests/database/Db/Adapter/Pdo/QueryCest.php
@@ -85,7 +85,7 @@ public function dbAdapterPdoQuery(DatabaseTester $I)
         $I->assertTrue(is_object($result));
         $I->assertInstanceOf(Pdo::class, $result);
 
-        while ($row = $result->fetch()) {
+        while ($result->fetch()) {
             $number++;
         }
         $I->assertEquals(5, $number);