diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index e2c67473595..3867382321c 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -3,7 +3,6 @@ Yii Framework 2 Change Log
 
 2.0.50 under development
 ------------------------
-- Bug #20045: Fix type `boolean` in `MySQL` (terabytesoftw)
 - Bug #20040: Fix type `boolean` in `MSSQL` (terabytesoftw)
 - Bug #20005: Fix `yii\console\controllers\ServeController` to specify the router script (terabytesoftw)
 - Bug #19060: Fix `yii\widgets\Menu` bug when using Closure for active item and adding additional tests in `tests\framework\widgets\MenuTest` (atrandafir)
diff --git a/framework/db/mysql/Schema.php b/framework/db/mysql/Schema.php
index 666279e3b98..fa2270eb77d 100644
--- a/framework/db/mysql/Schema.php
+++ b/framework/db/mysql/Schema.php
@@ -279,7 +279,7 @@ protected function loadColumnSchema($info)
                     if (isset($values[1])) {
                         $column->scale = (int) $values[1];
                     }
-                    if ($column->size === 1 && ($type === 'tinyint' || $type === 'bit')) {
+                    if ($column->size === 1 && $type === 'bit') {
                         $column->type = 'boolean';
                     } elseif ($type === 'bit') {
                         if ($column->size > 32) {
diff --git a/tests/framework/db/mysql/SchemaTest.php b/tests/framework/db/mysql/SchemaTest.php
index 82342419a8c..43a66a60b57 100644
--- a/tests/framework/db/mysql/SchemaTest.php
+++ b/tests/framework/db/mysql/SchemaTest.php
@@ -228,11 +228,6 @@ public function getExpectedColumns()
             ]
         );
 
-        $columns['bool_col']['type'] = 'boolean';
-        $columns['bool_col']['phpType'] = 'boolean';
-        $columns['bool_col2']['type'] = 'boolean';
-        $columns['bool_col2']['phpType'] = 'boolean';
-
         if (version_compare($version, '5.7', '<')) {
             $columns['int_col3']['phpType'] = 'string';
             $columns['json_col']['type'] = 'text';
diff --git a/tests/framework/db/mysql/type/BooleanTest.php b/tests/framework/db/mysql/type/BooleanTest.php
deleted file mode 100644
index bc9d307a78d..00000000000
--- a/tests/framework/db/mysql/type/BooleanTest.php
+++ /dev/null
@@ -1,249 +0,0 @@
-<?php
-/**
- * @link https://www.yiiframework.com/
- * @copyright Copyright (c) 2008 Yii Software LLC
- * @license https://www.yiiframework.com/license/
- */
-
-namespace yiiunit\framework\db\mysql\type;
-
-use yii\db\mysql\Schema;
-use yiiunit\framework\db\DatabaseTestCase;
-
-/**
- * @group db
- * @group mysql
- */
-class BooleanTest extends DatabaseTestCase
-{
-    protected $driverName = 'mysql';
-
-    public function testBoolean()
-    {
-        $db = $this->getConnection(true);
-        $schema = $db->getSchema();
-        $tableName = '{{%boolean}}';
-
-        if ($db->getTableSchema($tableName)) {
-            $db->createCommand()->dropTable($tableName)->execute();
-        }
-
-        $db->createCommand()->createTable(
-            $tableName,
-            [
-                'id' => $schema->createColumnSchemaBuilder(Schema::TYPE_PK),
-                'bool_col_tinyint' => $schema->createColumnSchemaBuilder(Schema::TYPE_BOOLEAN),
-                'bool_col_bit' => $schema->createColumnSchemaBuilder('bit', 1),
-            ]
-        )->execute();
-
-        // test type `boolean`
-        $columnBoolColTinyint = $db->getTableSchema($tableName)->getColumn('bool_col_tinyint');
-        $this->assertSame('boolean', $columnBoolColTinyint->phpType);
-
-        $columnBoolColBit = $db->getTableSchema($tableName)->getColumn('bool_col_bit');
-        $this->assertSame('boolean', $columnBoolColBit->phpType);
-
-        // test value `false`
-        $db->createCommand()->insert($tableName, ['bool_col_tinyint' => false, 'bool_col_bit' => false])->execute();
-        $boolValues = $db->createCommand("SELECT * FROM $tableName WHERE id = 1")->queryOne();
-        $this->assertEquals(0, $boolValues['bool_col_tinyint']);
-        $this->assertEquals(0, $boolValues['bool_col_bit']);
-
-        // test php typecast
-        $phpTypeCastBoolColTinyint = $columnBoolColTinyint->phpTypecast($boolValues['bool_col_tinyint']);
-        $this->assertFalse($phpTypeCastBoolColTinyint);
-
-        $phpTypeCastBoolColBit = $columnBoolColBit->phpTypecast($boolValues['bool_col_bit']);
-        $this->assertFalse($phpTypeCastBoolColBit);
-
-        // test value `true`
-        $db->createCommand()->insert($tableName, ['bool_col_tinyint' => true, 'bool_col_bit' => true])->execute();
-        $boolValues = $db->createCommand("SELECT * FROM $tableName WHERE id = 2")->queryOne();
-        $this->assertEquals(1, $boolValues['bool_col_tinyint']);
-        $this->assertEquals(1, $boolValues['bool_col_bit']);
-
-        // test php typecast
-        $phpTypeCastBoolColTinyint = $columnBoolColTinyint->phpTypecast($boolValues['bool_col_tinyint']);
-        $this->assertTrue($phpTypeCastBoolColTinyint);
-
-        $phpTypeCastBoolColBit = $columnBoolColBit->phpTypecast($boolValues['bool_col_bit']);
-        $this->assertTrue($phpTypeCastBoolColBit);
-    }
-
-    public function testBooleanWithValueInteger()
-    {
-        $db = $this->getConnection(true);
-        $schema = $db->getSchema();
-        $tableName = '{{%boolean}}';
-
-        if ($db->getTableSchema($tableName)) {
-            $db->createCommand()->dropTable($tableName)->execute();
-        }
-
-        $db->createCommand()->createTable(
-            $tableName,
-            [
-                'id' => $schema->createColumnSchemaBuilder(Schema::TYPE_PK),
-                'bool_col_tinyint' => $schema->createColumnSchemaBuilder(Schema::TYPE_BOOLEAN),
-                'bool_col_bit' => $schema->createColumnSchemaBuilder('bit', 1),
-            ]
-        )->execute();
-
-        // test type `boolean`
-        $columnBoolColTinyint = $db->getTableSchema($tableName)->getColumn('bool_col_tinyint');
-        $this->assertSame('boolean', $columnBoolColTinyint->phpType);
-
-        $columnBoolColBit = $db->getTableSchema($tableName)->getColumn('bool_col_bit');
-        $this->assertSame('boolean', $columnBoolColBit->phpType);
-
-        // test value `0`
-        $db->createCommand()->insert($tableName, ['bool_col_tinyint' => 0, 'bool_col_bit' => 0])->execute();
-        $boolValues = $db->createCommand("SELECT * FROM $tableName WHERE id = 1")->queryOne();
-        $this->assertEquals(0, $boolValues['bool_col_tinyint']);
-        $this->assertEquals(0, $boolValues['bool_col_bit']);
-
-        // test php typecast
-        $phpTypeCastBoolColTinyint = $columnBoolColTinyint->phpTypecast($boolValues['bool_col_tinyint']);
-        $this->assertFalse($phpTypeCastBoolColTinyint);
-
-        $phpTypeCastBoolColBit = $columnBoolColBit->phpTypecast($boolValues['bool_col_bit']);
-        $this->assertFalse($phpTypeCastBoolColBit);
-
-        // test value `1`
-        $db->createCommand()->insert($tableName, ['bool_col_tinyint' => 1, 'bool_col_bit' => 1])->execute();
-        $boolValues = $db->createCommand("SELECT * FROM $tableName WHERE id = 2")->queryOne();
-        $this->assertEquals(1, $boolValues['bool_col_tinyint']);
-        $this->assertEquals(1, $boolValues['bool_col_bit']);
-
-        // test php typecast
-        $phpTypeCastBoolColTinyint = $columnBoolColTinyint->phpTypecast($boolValues['bool_col_tinyint']);
-        $this->assertTrue($phpTypeCastBoolColTinyint);
-
-        $phpTypeCastBoolColBit = $columnBoolColBit->phpTypecast($boolValues['bool_col_bit']);
-        $this->assertTrue($phpTypeCastBoolColBit);
-    }
-
-    public function testBooleanWithValueNegative()
-    {
-        $db = $this->getConnection(true);
-        $schema = $db->getSchema();
-        $tableName = '{{%boolean}}';
-
-        if ($db->getTableSchema($tableName)) {
-            $db->createCommand()->dropTable($tableName)->execute();
-        }
-
-        $db->createCommand()->createTable(
-            $tableName,
-            [
-                'id' => $schema->createColumnSchemaBuilder(Schema::TYPE_PK),
-                'bool_col_tinyint' => $schema->createColumnSchemaBuilder(Schema::TYPE_BOOLEAN),
-                'bool_col_bit' => $schema->createColumnSchemaBuilder('bit', 1),
-            ]
-        )->execute();
-
-        // test type `boolean`
-        $columnBoolColTinyint = $db->getTableSchema($tableName)->getColumn('bool_col_tinyint');
-        $this->assertSame('boolean', $columnBoolColTinyint->phpType);
-
-        $columnBoolColBit = $db->getTableSchema($tableName)->getColumn('bool_col_bit');
-        $this->assertSame('boolean', $columnBoolColBit->phpType);
-
-        // test value `-1`
-        $db->createCommand()->insert($tableName, ['bool_col_tinyint' => -1, 'bool_col_bit' => -1])->execute();
-        $boolValues = $db->createCommand("SELECT * FROM $tableName WHERE id = 1")->queryOne();
-
-        $this->assertEquals(1, $boolValues['bool_col_tinyint']);
-        $this->assertEquals(1, $boolValues['bool_col_bit']);
-
-        // test php typecast
-        $phpTypeCastBoolColTinyint = $columnBoolColTinyint->phpTypecast($boolValues['bool_col_tinyint']);
-        $this->assertTrue($phpTypeCastBoolColTinyint);
-
-        $phpTypeCastBoolColBit = $columnBoolColBit->phpTypecast($boolValues['bool_col_bit']);
-        $this->assertTrue($phpTypeCastBoolColBit);
-    }
-
-    public function testBooleanWithValueNull()
-    {
-        $db = $this->getConnection(true);
-        $schema = $db->getSchema();
-        $tableName = '{{%boolean}}';
-
-        if ($db->getTableSchema($tableName)) {
-            $db->createCommand()->dropTable($tableName)->execute();
-        }
-
-        $db->createCommand()->createTable(
-            $tableName,
-            [
-                'id' => $schema->createColumnSchemaBuilder(Schema::TYPE_PK),
-                'bool_col_tinyint' => $schema->createColumnSchemaBuilder(Schema::TYPE_BOOLEAN),
-                'bool_col_bit' => $schema->createColumnSchemaBuilder('bit', 1),
-            ]
-        )->execute();
-
-        // test type `boolean`
-        $columnBoolColTinyint = $db->getTableSchema($tableName)->getColumn('bool_col_tinyint');
-        $this->assertSame('boolean', $columnBoolColTinyint->phpType);
-
-        $columnBoolColBit = $db->getTableSchema($tableName)->getColumn('bool_col_bit');
-        $this->assertSame('boolean', $columnBoolColBit->phpType);
-
-        // test value `null`
-        $db->createCommand()->insert($tableName, ['bool_col_tinyint' => null, 'bool_col_bit' => null])->execute();
-        $boolValues = $db->createCommand("SELECT * FROM $tableName WHERE id = 1")->queryOne();
-
-        $this->assertNull($boolValues['bool_col_tinyint']);
-        $this->assertNull($boolValues['bool_col_bit']);
-
-        // test php typecast
-        $phpTypeCastBoolColTinyint = $columnBoolColTinyint->phpTypecast($boolValues['bool_col_tinyint']);
-        $this->assertNull($phpTypeCastBoolColTinyint);
-
-        $phpTypeCastBoolColBit = $columnBoolColBit->phpTypecast($boolValues['bool_col_bit']);
-        $this->assertNull($phpTypeCastBoolColBit);
-    }
-
-    public function testBooleanWithValueOverflow()
-    {
-        $db = $this->getConnection(true);
-        $schema = $db->getSchema();
-        $tableName = '{{%boolean}}';
-
-        if ($db->getTableSchema($tableName)) {
-            $db->createCommand()->dropTable($tableName)->execute();
-        }
-
-        $db->createCommand()->createTable(
-            $tableName,
-            [
-                'id' => $schema->createColumnSchemaBuilder(Schema::TYPE_PK),
-                'bool_col_tinyint' => $schema->createColumnSchemaBuilder(Schema::TYPE_BOOLEAN),
-                'bool_col_bit' => $schema->createColumnSchemaBuilder('bit', 1),
-            ]
-        )->execute();
-
-        // test type `boolean`
-        $columnBoolColTinyint = $db->getTableSchema($tableName)->getColumn('bool_col_tinyint');
-        $this->assertSame('boolean', $columnBoolColTinyint->phpType);
-
-        $columnBoolColBit = $db->getTableSchema($tableName)->getColumn('bool_col_bit');
-        $this->assertSame('boolean', $columnBoolColBit->phpType);
-
-        // test value `2`
-        $db->createCommand()->insert($tableName, ['bool_col_tinyint' => 2, 'bool_col_bit' => 2])->execute();
-        $boolValues = $db->createCommand("SELECT * FROM $tableName WHERE id = 1")->queryOne();
-
-        $this->assertEquals(1, $boolValues['bool_col_tinyint']);
-        $this->assertEquals(1, $boolValues['bool_col_bit']);
-
-        // test php typecast
-        $phpTypeCastBoolColTinyint = $columnBoolColTinyint->phpTypecast($boolValues['bool_col_tinyint']);
-        $this->assertTrue($phpTypeCastBoolColTinyint);
-
-        $phpTypeCastBoolColBit = $columnBoolColBit->phpTypecast($boolValues['bool_col_bit']);
-        $this->assertTrue($phpTypeCastBoolColBit);
-    }
-}