diff --git a/.github/workflows/build-mssql.yml b/.github/workflows/build-mssql.yml
new file mode 100644
index 0000000..95c3a02
--- /dev/null
+++ b/.github/workflows/build-mssql.yml
@@ -0,0 +1,58 @@
+on:
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
+      - 'README.md'
+      - 'CHANGELOG.md'
+      - '.gitignore'
+      - '.gitattributes'
+
+  push:
+    paths-ignore:
+      - 'docs/**'
+      - 'README.md'
+      - 'CHANGELOG.md'
+      - '.gitignore'
+      - '.gitattributes'
+
+name: build-mssql
+
+jobs:
+  mssql:
+    name: SQL Server tests.
+    uses: php-forge/actions/.github/workflows/phpunit-database.yml@main
+    secrets:
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+    with:
+      concurrency-group: mssql-${{ github.ref }}
+      database-env: |
+        {
+          "ACCEPT_EULA": "Y",
+          "SA_PASSWORD": "YourStrong!Passw0rd",
+          "MSSQL_PID": "Developer"
+        }
+      database-health-cmd: "/opt/mssql-tools18/bin/sqlcmd -C -S localhost -U SA -P 'YourStrong!Passw0rd' -Q 'SELECT 1'"
+      database-health-retries: 5
+      database-image: mcr.microsoft.com/mssql/server
+      database-port: 1433
+      database-type: mssql
+      database-versions: '["2022-latest"]'
+      enable-concurrency: true
+      extensions: pdo, pdo_sqlsrv, sqlsrv
+      os: '["ubuntu-latest"]'
+      php-version: '["8.4"]'
+      phpunit-group: mssql
+      setup-commands: |
+        # Install Microsoft ODBC Driver for SQL Server
+        sudo ACCEPT_EULA=Y apt-get install -y msodbcsql18
+
+        # Wait for SQL Server to be fully ready
+        sleep 15
+
+        # Create test database
+        docker exec -i database /opt/mssql-tools18/bin/sqlcmd -C -S localhost -U SA -P 'YourStrong!Passw0rd' -Q "
+        IF NOT EXISTS (SELECT name FROM sys.databases WHERE name = 'yiitest')
+        BEGIN
+            CREATE DATABASE yiitest;
+        END
+        "
diff --git a/.github/workflows/build-mysql.yml b/.github/workflows/build-mysql.yml
new file mode 100644
index 0000000..1e830ac
--- /dev/null
+++ b/.github/workflows/build-mysql.yml
@@ -0,0 +1,43 @@
+on:
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
+      - 'README.md'
+      - 'CHANGELOG.md'
+      - '.gitignore'
+      - '.gitattributes'
+
+  push:
+    paths-ignore:
+      - 'docs/**'
+      - 'README.md'
+      - 'CHANGELOG.md'
+      - '.gitignore'
+      - '.gitattributes'
+
+name: build-mysql
+
+jobs:
+  mysql:
+    name: MySQL tests.
+    uses: php-forge/actions/.github/workflows/phpunit-database.yml@main
+    secrets:
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+    with:
+      concurrency-group: mysql-${{ github.ref }}
+      database-env: |
+        {
+          "MYSQL_DATABASE": "yiitest",
+          "MYSQL_ROOT_PASSWORD": "root",
+        }
+      database-health-cmd: "mysqladmin ping"
+      database-health-retries: 3
+      database-image: mysql
+      database-port: 3306
+      database-type: mysql
+      database-versions: '["8.0", "8.4", "latest"]'
+      enable-concurrency: true
+      extensions: pdo, pdo_mysql
+      os: '["ubuntu-latest"]'
+      php-version: '["8.4"]'
+      phpunit-group: mysql
diff --git a/.github/workflows/build-pgsql.yml b/.github/workflows/build-pgsql.yml
new file mode 100644
index 0000000..45682bd
--- /dev/null
+++ b/.github/workflows/build-pgsql.yml
@@ -0,0 +1,44 @@
+on:
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
+      - 'README.md'
+      - 'CHANGELOG.md'
+      - '.gitignore'
+      - '.gitattributes'
+
+  push:
+    paths-ignore:
+      - 'docs/**'
+      - 'README.md'
+      - 'CHANGELOG.md'
+      - '.gitignore'
+      - '.gitattributes'
+
+name: build-pgsql
+
+jobs:
+  pgsql:
+    name: PostgreSQL tests.
+    uses: php-forge/actions/.github/workflows/phpunit-database.yml@main
+    secrets:
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+    with:
+      concurrency-group: pgsql-${{ github.ref }}
+      database-env: |
+        {
+          "POSTGRES_DB": "yiitest",
+          "POSTGRES_USER": "root",
+          "POSTGRES_PASSWORD": "root"
+        }
+      database-health-cmd: "pg_isready -U postgres"
+      database-health-retries: 3
+      database-image: postgres
+      database-port: 5432
+      database-type: pgsql
+      database-versions: '["15", "16", "17"]'
+      enable-concurrency: true
+      extensions: pdo, pdo_pgsql
+      os: '["ubuntu-latest"]'
+      php-version: '["8.4"]'
+      phpunit-group: pgsql
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 089297a..ce9b83a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,6 +27,7 @@ jobs:
         composer require yiisoft/yii2:22.0.x-dev --prefer-dist --no-progress --no-interaction --no-scripts --ansi
       concurrency-group: phpunit-${{ github.workflow }}-${{ github.ref }}
       extensions: pdo, pdo_sqlite
+      phpunit-group: sqlite
   phpunit-compatibility:
     uses: php-forge/actions/.github/workflows/phpunit.yml@main
     secrets:
@@ -34,3 +35,4 @@ jobs:
     with:
       concurrency-group: compatibility-${{ github.workflow }}-${{ github.ref }}
       extensions: pdo, pdo_sqlite
+      phpunit-group: sqlite
diff --git a/.github/workflows/mutation.yml b/.github/workflows/mutation.yml
index 9c6f1ec..6d35498 100644
--- a/.github/workflows/mutation.yml
+++ b/.github/workflows/mutation.yml
@@ -22,5 +22,6 @@ jobs:
     uses: php-forge/actions/.github/workflows/infection.yml@main
     with:
       phpstan: true
+      framework-options: --test-framework-options="--group=sqlite"
     secrets:
       STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
diff --git a/composer.json b/composer.json
index 7fe8f94..3d299ea 100644
--- a/composer.json
+++ b/composer.json
@@ -51,8 +51,8 @@
     "scripts": {
         "check-dependencies": "./vendor/bin/composer-require-checker check",
         "ecs": "./vendor/bin/ecs --fix",
-        "mutation": "./vendor/bin/infection --threads=4 --ignore-msi-with-no-mutations --only-covered --min-msi=100 --min-covered-msi=100",
-        "mutation-static": "./vendor/bin/infection --threads=4 --ignore-msi-with-no-mutations --only-covered --min-msi=100 --min-covered-msi=100 --static-analysis-tool=phpstan",
+        "mutation": "./vendor/bin/infection --threads=4 --ignore-msi-with-no-mutations --only-covered --min-msi=100 --min-covered-msi=100 --test-framework-options=--group=sqlite",
+        "mutation-static": "./vendor/bin/infection --threads=4 --ignore-msi-with-no-mutations --only-covered --min-msi=100 --min-covered-msi=100 --static-analysis-tool=phpstan --test-framework-options=--group=sqlite",
         "rector": "./vendor/bin/rector process src",
         "static": "./vendor/bin/phpstan --memory-limit=512M",
         "tests": "./vendor/bin/phpunit"
diff --git a/src/NestedSetsBehavior.php b/src/NestedSetsBehavior.php
index 7becb13..211d7d9 100644
--- a/src/NestedSetsBehavior.php
+++ b/src/NestedSetsBehavior.php
@@ -1070,7 +1070,10 @@ protected function beforeInsertNode(int $value, int $depth): void
      */
     protected function beforeInsertRootNode(): void
     {
-        if ($this->treeAttribute === false && $this->getOwner()::find()->roots()->exists()) {
+        if (
+            $this->treeAttribute === false &&
+            $this->getOwner()::find()->andWhere([$this->leftAttribute => 1])->exists()
+        ) {
             throw new Exception('Can not create more than one root when "treeAttribute" is false.');
         }
 
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 0bf1beb..58c9e0e 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -16,6 +16,7 @@
 use function array_values;
 use function dom_import_simplexml;
 use function file_get_contents;
+use function preg_replace;
 use function simplexml_load_string;
 use function str_replace;
 
@@ -38,9 +39,12 @@
 class TestCase extends \PHPUnit\Framework\TestCase
 {
     use SchemaBuilderTrait;
+    protected string $driverName = 'sqlite';
 
     protected string|null $dsn = null;
     protected string $fixtureDirectory = __DIR__ . '/support/data/';
+    protected string $password = '';
+    protected string $username = '';
 
     protected function setUp(): void
     {
@@ -103,12 +107,12 @@ protected function assertQueryHasOrderBy(ActiveQuery $query, string $methodName)
 
         self::assertStringContainsString(
             'ORDER BY',
-            $sql,
+            $this->replaceQuotes($sql),
             "'{$methodName}' query should include 'ORDER BY' clause for deterministic results.",
         );
 
         self::assertStringContainsString(
-            '`lft`',
+            $this->replaceQuotes('[[lft]]'),
             $sql,
             "'{$methodName}' query should order by 'left' attribute for consistent ordering.",
         );
@@ -167,11 +171,11 @@ protected function createDatabase(): void
         $command = $this->getDb()->createCommand();
 
         if ($this->getDb()->getTableSchema('tree', true) !== null) {
-            $command->dropTable('tree');
+            $command->dropTable('tree')->execute();
         }
 
         if ($this->getDb()->getTableSchema('multiple_tree', true) !== null) {
-            $command->dropTable('multiple_tree');
+            $command->dropTable('multiple_tree')->execute();
         }
 
         $command->createTable(
@@ -291,14 +295,14 @@ protected function generateFixtureTree(): void
      */
     protected function getDataSet(): array
     {
-        $dataSetTree = Tree::find()->asArray()->all();
+        $dataSetTree = Tree::find()->orderBy(['id' => SORT_ASC])->asArray()->all();
 
         foreach ($dataSetTree as $key => $value) {
             $dataSetTree[$key]['type'] = 'tree';
             $dataSetTree[$key]['tree'] = 0;
         }
 
-        $dataSetMultipleTree = MultipleTree::find()->asArray()->all();
+        $dataSetMultipleTree = MultipleTree::find()->orderBy(['id' => SORT_ASC])->asArray()->all();
 
         foreach ($dataSetMultipleTree as $key => $value) {
             $dataSetMultipleTree[$key]['type'] = 'multiple_tree';
@@ -314,7 +318,7 @@ protected function getDataSet(): array
      */
     protected function getDataSetMultipleTree(): array
     {
-        $dataSetMultipleTree = MultipleTree::find()->asArray()->all();
+        $dataSetMultipleTree = MultipleTree::find()->orderBy(['id' => SORT_ASC])->asArray()->all();
 
         foreach ($dataSetMultipleTree as $key => $value) {
             $dataSetMultipleTree[$key]['type'] = 'multiple_tree';
@@ -352,12 +356,48 @@ protected function mockConsoleApplication(): void
                     'db' => [
                         'class' => Connection::class,
                         'dsn' => $this->dsn !== null ? $this->dsn : 'sqlite::memory:',
+                        'password' => $this->password,
+                        'username' => $this->username,
                     ],
                 ],
             ],
         );
     }
 
+    /**
+     * Adjust dbms specific escaping.
+     *
+     * @param string $sql SQL to adjust.
+     *
+     * @return string Adjusted SQL.
+     */
+    protected function replaceQuotes(string $sql): string
+    {
+        return match ($this->driverName) {
+            'mysql', 'sqlite' => str_replace(
+                ['[[', ']]'],
+                '`',
+                $sql,
+            ),
+            'oci' => str_replace(
+                ['[[', ']]'],
+                '"',
+                $sql,
+            ),
+            'pgsql' => str_replace(
+                ['\\[', '\\]'],
+                ['[', ']'],
+                preg_replace('/(\[\[)|((?<!(\[))\]\])/', '"', $sql) ?? $sql,
+            ),
+            'sqlsrv' => str_replace(
+                ['[[', ']]'],
+                ['[', ']'],
+                $sql,
+            ),
+            default => $sql,
+        };
+    }
+
     /**
      * Applies database updates to tree nodes.
      *
diff --git a/tests/base/AbstractQueryBehavior.php b/tests/base/AbstractQueryBehavior.php
index 53c3e2f..2dfbbdd 100644
--- a/tests/base/AbstractQueryBehavior.php
+++ b/tests/base/AbstractQueryBehavior.php
@@ -128,7 +128,7 @@ public function testRootsMethodRequiresLeftAttributeOrderingWhenTreeAttributeIsD
             "'roots()' query should include 'ORDER BY' clause for consistent results.",
         );
         self::assertStringContainsString(
-            '`lft`',
+            $this->replaceQuotes('[[lft]]'),
             $sql,
             "'roots()' query should order by 'left' attribute for deterministic ordering.",
         );
diff --git a/tests/mssql/CacheManagementTest.php b/tests/mssql/CacheManagementTest.php
new file mode 100644
index 0000000..804feb0
--- /dev/null
+++ b/tests/mssql/CacheManagementTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
+
+#[Group('mssql')]
+final class CacheManagementTest extends AbstractCacheManagement
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/ExceptionHandlingTest.php b/tests/mssql/ExceptionHandlingTest.php
new file mode 100644
index 0000000..7c35ba3
--- /dev/null
+++ b/tests/mssql/ExceptionHandlingTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
+
+#[Group('mssql')]
+final class ExceptionHandlingTest extends AbstractExceptionHandling
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/ExtensibilityTest.php b/tests/mssql/ExtensibilityTest.php
new file mode 100644
index 0000000..25b010c
--- /dev/null
+++ b/tests/mssql/ExtensibilityTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
+
+#[Group('mssql')]
+final class ExtensibilityTest extends AbstractExtensibility
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/NodeAppendTest.php b/tests/mssql/NodeAppendTest.php
new file mode 100644
index 0000000..fad8db8
--- /dev/null
+++ b/tests/mssql/NodeAppendTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
+
+#[Group('mssql')]
+final class NodeAppendTest extends AbstractNodeAppend
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/NodeDeleteTest.php b/tests/mssql/NodeDeleteTest.php
new file mode 100644
index 0000000..9586a8e
--- /dev/null
+++ b/tests/mssql/NodeDeleteTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
+
+#[Group('mssql')]
+final class NodeDeleteTest extends AbstractNodeDelete
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/NodeInsertTest.php b/tests/mssql/NodeInsertTest.php
new file mode 100644
index 0000000..3cf7399
--- /dev/null
+++ b/tests/mssql/NodeInsertTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
+
+#[Group('mssql')]
+final class NodeInsertTest extends AbstractNodeInsert
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/NodePrependTest.php b/tests/mssql/NodePrependTest.php
new file mode 100644
index 0000000..6e26632
--- /dev/null
+++ b/tests/mssql/NodePrependTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
+
+#[Group('mssql')]
+final class NodePrependTest extends AbstractNodePrepend
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/NodeStateTest.php b/tests/mssql/NodeStateTest.php
new file mode 100644
index 0000000..0a5a862
--- /dev/null
+++ b/tests/mssql/NodeStateTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
+
+#[Group('mssql')]
+final class NodeStateTest extends AbstractNodeState
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/QueryBehaviorTest.php b/tests/mssql/QueryBehaviorTest.php
new file mode 100644
index 0000000..c6c47b3
--- /dev/null
+++ b/tests/mssql/QueryBehaviorTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
+
+#[Group('mssql')]
+final class QueryBehaviorTest extends AbstractQueryBehavior
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/TreeTraversalTest.php b/tests/mssql/TreeTraversalTest.php
new file mode 100644
index 0000000..b53c8ad
--- /dev/null
+++ b/tests/mssql/TreeTraversalTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
+
+#[Group('mssql')]
+final class TreeTraversalTest extends AbstractTreeTraversal
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mssql/ValidationAndStructureTest.php b/tests/mssql/ValidationAndStructureTest.php
new file mode 100644
index 0000000..f99081f
--- /dev/null
+++ b/tests/mssql/ValidationAndStructureTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mssql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;
+
+#[Group('mssql')]
+final class ValidationAndStructureTest extends AbstractValidationAndStructure
+{
+    protected string $driverName = 'sqlsrv';
+    protected string|null $dsn = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
+    protected string $password = 'YourStrong!Passw0rd';
+    protected string $username = 'SA';
+}
diff --git a/tests/mysql/CacheManagementTest.php b/tests/mysql/CacheManagementTest.php
new file mode 100644
index 0000000..1f5c2b4
--- /dev/null
+++ b/tests/mysql/CacheManagementTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
+
+#[Group('mysql')]
+final class CacheManagementTest extends AbstractCacheManagement
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/ExceptionHandlingTest.php b/tests/mysql/ExceptionHandlingTest.php
new file mode 100644
index 0000000..6682dfb
--- /dev/null
+++ b/tests/mysql/ExceptionHandlingTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
+
+#[Group('mysql')]
+final class ExceptionHandlingTest extends AbstractExceptionHandling
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/ExtensibilityTest.php b/tests/mysql/ExtensibilityTest.php
new file mode 100644
index 0000000..ae2114a
--- /dev/null
+++ b/tests/mysql/ExtensibilityTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
+
+#[Group('mysql')]
+final class ExtensibilityTest extends AbstractExtensibility
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/NodeAppendTest.php b/tests/mysql/NodeAppendTest.php
new file mode 100644
index 0000000..a2f885c
--- /dev/null
+++ b/tests/mysql/NodeAppendTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
+
+#[Group('mysql')]
+final class NodeAppendTest extends AbstractNodeAppend
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/NodeDeleteTest.php b/tests/mysql/NodeDeleteTest.php
new file mode 100644
index 0000000..f1c1b89
--- /dev/null
+++ b/tests/mysql/NodeDeleteTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
+
+#[Group('mysql')]
+final class NodeDeleteTest extends AbstractNodeDelete
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/NodeInsertTest.php b/tests/mysql/NodeInsertTest.php
new file mode 100644
index 0000000..1691012
--- /dev/null
+++ b/tests/mysql/NodeInsertTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
+
+#[Group('mysql')]
+final class NodeInsertTest extends AbstractNodeInsert
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/NodePrependTest.php b/tests/mysql/NodePrependTest.php
new file mode 100644
index 0000000..656995e
--- /dev/null
+++ b/tests/mysql/NodePrependTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
+
+#[Group('mysql')]
+final class NodePrependTest extends AbstractNodePrepend
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/NodeStateTest.php b/tests/mysql/NodeStateTest.php
new file mode 100644
index 0000000..9fd640d
--- /dev/null
+++ b/tests/mysql/NodeStateTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
+
+#[Group('mysql')]
+final class NodeStateTest extends AbstractNodeState
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/QueryBehaviorTest.php b/tests/mysql/QueryBehaviorTest.php
new file mode 100644
index 0000000..1abc4ff
--- /dev/null
+++ b/tests/mysql/QueryBehaviorTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
+
+#[Group('mysql')]
+final class QueryBehaviorTest extends AbstractQueryBehavior
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/TreeTraversalTest.php b/tests/mysql/TreeTraversalTest.php
new file mode 100644
index 0000000..562d6b3
--- /dev/null
+++ b/tests/mysql/TreeTraversalTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
+
+#[Group('mysql')]
+final class TreeTraversalTest extends AbstractTreeTraversal
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/mysql/ValidationAndStructureTest.php b/tests/mysql/ValidationAndStructureTest.php
new file mode 100644
index 0000000..dae7c44
--- /dev/null
+++ b/tests/mysql/ValidationAndStructureTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\mysql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;
+
+#[Group('mysql')]
+final class ValidationAndStructureTest extends AbstractValidationAndStructure
+{
+    protected string $driverName = 'mysql';
+    protected string|null $dsn = 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/CacheManagementTest.php b/tests/pgsql/CacheManagementTest.php
new file mode 100644
index 0000000..0578883
--- /dev/null
+++ b/tests/pgsql/CacheManagementTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
+
+#[Group('pgsql')]
+final class CacheManagementTest extends AbstractCacheManagement
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/ExceptionHandlingTest.php b/tests/pgsql/ExceptionHandlingTest.php
new file mode 100644
index 0000000..293f462
--- /dev/null
+++ b/tests/pgsql/ExceptionHandlingTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
+
+#[Group('pgsql')]
+final class ExceptionHandlingTest extends AbstractExceptionHandling
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/ExtensibilityTest.php b/tests/pgsql/ExtensibilityTest.php
new file mode 100644
index 0000000..b0242c1
--- /dev/null
+++ b/tests/pgsql/ExtensibilityTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
+
+#[Group('pgsql')]
+final class ExtensibilityTest extends AbstractExtensibility
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/NodeAppendTest.php b/tests/pgsql/NodeAppendTest.php
new file mode 100644
index 0000000..742ddab
--- /dev/null
+++ b/tests/pgsql/NodeAppendTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
+
+#[Group('pgsql')]
+final class NodeAppendTest extends AbstractNodeAppend
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/NodeDeleteTest.php b/tests/pgsql/NodeDeleteTest.php
new file mode 100644
index 0000000..521d189
--- /dev/null
+++ b/tests/pgsql/NodeDeleteTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
+
+#[Group('pgsql')]
+final class NodeDeleteTest extends AbstractNodeDelete
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/NodeInsertTest.php b/tests/pgsql/NodeInsertTest.php
new file mode 100644
index 0000000..3e1fcac
--- /dev/null
+++ b/tests/pgsql/NodeInsertTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
+
+#[Group('pgsql')]
+final class NodeInsertTest extends AbstractNodeInsert
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/NodePrependTest.php b/tests/pgsql/NodePrependTest.php
new file mode 100644
index 0000000..d2b56c1
--- /dev/null
+++ b/tests/pgsql/NodePrependTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
+
+#[Group('pgsql')]
+final class NodePrependTest extends AbstractNodePrepend
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/NodeStateTest.php b/tests/pgsql/NodeStateTest.php
new file mode 100644
index 0000000..c49dedc
--- /dev/null
+++ b/tests/pgsql/NodeStateTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
+
+#[Group('pgsql')]
+final class NodeStateTest extends AbstractNodeState
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/QueryBehaviorTest.php b/tests/pgsql/QueryBehaviorTest.php
new file mode 100644
index 0000000..feb1682
--- /dev/null
+++ b/tests/pgsql/QueryBehaviorTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
+
+#[Group('pgsql')]
+final class QueryBehaviorTest extends AbstractQueryBehavior
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/TreeTraversalTest.php b/tests/pgsql/TreeTraversalTest.php
new file mode 100644
index 0000000..fc1c3b7
--- /dev/null
+++ b/tests/pgsql/TreeTraversalTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
+
+#[Group('pgsql')]
+final class TreeTraversalTest extends AbstractTreeTraversal
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/pgsql/ValidationAndStructureTest.php b/tests/pgsql/ValidationAndStructureTest.php
new file mode 100644
index 0000000..e419869
--- /dev/null
+++ b/tests/pgsql/ValidationAndStructureTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\pgsql;
+
+use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;
+
+#[Group('pgsql')]
+final class ValidationAndStructureTest extends AbstractValidationAndStructure
+{
+    protected string $driverName = 'pgsql';
+    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
+    protected string $password = 'root';
+    protected string $username = 'root';
+}
diff --git a/tests/sqlite/CacheManagementTest.php b/tests/sqlite/CacheManagementTest.php
index f5498bd..40ddc1c 100644
--- a/tests/sqlite/CacheManagementTest.php
+++ b/tests/sqlite/CacheManagementTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
diff --git a/tests/sqlite/ExceptionHandlingTest.php b/tests/sqlite/ExceptionHandlingTest.php
index 49ce124..9cfda48 100644
--- a/tests/sqlite/ExceptionHandlingTest.php
+++ b/tests/sqlite/ExceptionHandlingTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
diff --git a/tests/sqlite/ExtensibilityTest.php b/tests/sqlite/ExtensibilityTest.php
index 32e0e3a..a898195 100644
--- a/tests/sqlite/ExtensibilityTest.php
+++ b/tests/sqlite/ExtensibilityTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
diff --git a/tests/sqlite/NodeAppendTest.php b/tests/sqlite/NodeAppendTest.php
index 817653e..c8a8721 100644
--- a/tests/sqlite/NodeAppendTest.php
+++ b/tests/sqlite/NodeAppendTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
diff --git a/tests/sqlite/NodeDeleteTest.php b/tests/sqlite/NodeDeleteTest.php
index bf33b84..227ab6b 100644
--- a/tests/sqlite/NodeDeleteTest.php
+++ b/tests/sqlite/NodeDeleteTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
diff --git a/tests/sqlite/NodeInsertTest.php b/tests/sqlite/NodeInsertTest.php
index cd23132..90cb478 100644
--- a/tests/sqlite/NodeInsertTest.php
+++ b/tests/sqlite/NodeInsertTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
diff --git a/tests/sqlite/NodePrependTest.php b/tests/sqlite/NodePrependTest.php
index a80e238..eb310b1 100644
--- a/tests/sqlite/NodePrependTest.php
+++ b/tests/sqlite/NodePrependTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
diff --git a/tests/sqlite/NodeStateTest.php b/tests/sqlite/NodeStateTest.php
index d4c6cd4..ff2d74b 100644
--- a/tests/sqlite/NodeStateTest.php
+++ b/tests/sqlite/NodeStateTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
diff --git a/tests/sqlite/QueryBehaviorTest.php b/tests/sqlite/QueryBehaviorTest.php
index 74b8ba0..e084f0c 100644
--- a/tests/sqlite/QueryBehaviorTest.php
+++ b/tests/sqlite/QueryBehaviorTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
diff --git a/tests/sqlite/TreeTraversalTest.php b/tests/sqlite/TreeTraversalTest.php
index dc19674..faac023 100644
--- a/tests/sqlite/TreeTraversalTest.php
+++ b/tests/sqlite/TreeTraversalTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
diff --git a/tests/sqlite/ValidationAndStructureTest.php b/tests/sqlite/ValidationAndStructureTest.php
index 6c3268a..b96a027 100644
--- a/tests/sqlite/ValidationAndStructureTest.php
+++ b/tests/sqlite/ValidationAndStructureTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace yii2\extensions\nestedsets\tests;
+namespace yii2\extensions\nestedsets\tests\sqlite;
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;