diff --git a/.github/workflows/build-mssql.yml b/.github/workflows/build-mssql.yml
index 95c3a02..623c116 100644
--- a/.github/workflows/build-mssql.yml
+++ b/.github/workflows/build-mssql.yml
@@ -29,7 +29,7 @@ jobs:
         {
           "ACCEPT_EULA": "Y",
           "SA_PASSWORD": "YourStrong!Passw0rd",
-          "MSSQL_PID": "Developer"
+          "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
diff --git a/.github/workflows/build-oracle.yml b/.github/workflows/build-oracle.yml
index 79dd54c..74c6092 100644
--- a/.github/workflows/build-oracle.yml
+++ b/.github/workflows/build-oracle.yml
@@ -28,7 +28,7 @@ jobs:
       database-env: |
         {
           "ORACLE_DATABASE": "yiitest",
-          "ORACLE_PASSWORD": "root"
+          "ORACLE_PASSWORD": "root",
         }
       database-health-cmd: "healthcheck.sh"
       database-health-retries: 10
diff --git a/.github/workflows/build-pgsql.yml b/.github/workflows/build-pgsql.yml
index 45682bd..ec67222 100644
--- a/.github/workflows/build-pgsql.yml
+++ b/.github/workflows/build-pgsql.yml
@@ -29,7 +29,7 @@ jobs:
         {
           "POSTGRES_DB": "yiitest",
           "POSTGRES_USER": "root",
-          "POSTGRES_PASSWORD": "root"
+          "POSTGRES_PASSWORD": "root",
         }
       database-health-cmd: "pg_isready -U postgres"
       database-health-retries: 3
diff --git a/ecs.php b/ecs.php
index b939d59..dc0eeac 100644
--- a/ecs.php
+++ b/ecs.php
@@ -26,6 +26,7 @@
                 'constant_public',
                 'constant_protected',
                 'constant_private',
+                'case',
                 'property_public',
                 'property_protected',
                 'property_private',
diff --git a/tests/TestCase.php b/tests/TestCase.php
index bac0ea2..c43419c 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -40,12 +40,12 @@
 class TestCase extends \PHPUnit\Framework\TestCase
 {
     use SchemaBuilderTrait;
-    protected string $driverName = 'sqlite';
 
-    protected string|null $dsn = null;
+    /**
+     * @phpstan-var string[]
+     */
+    protected array $connection = [];
     protected string $fixtureDirectory = __DIR__ . '/support/data/';
-    protected string $password = '';
-    protected string $username = '';
 
     protected function setUp(): void
     {
@@ -341,12 +341,7 @@ protected function mockConsoleApplication(): void
                 'id' => 'testapp',
                 'basePath' => dirname(__DIR__),
                 'components' => [
-                    'db' => [
-                        'class' => Connection::class,
-                        'dsn' => $this->dsn !== null ? $this->dsn : 'sqlite::memory:',
-                        'password' => $this->password,
-                        'username' => $this->username,
-                    ],
+                    'db' => $this->connection,
                 ],
             ],
         );
@@ -361,7 +356,7 @@ protected function mockConsoleApplication(): void
      */
     protected function replaceQuotes(string $sql): string
     {
-        return match ($this->driverName) {
+        return match ($this->getDb()->driverName) {
             'mysql', 'sqlite' => str_replace(
                 ['[[', ']]'],
                 '`',
diff --git a/tests/mssql/CacheManagementTest.php b/tests/mssql/CacheManagementTest.php
index 22678d6..dc557ea 100644
--- a/tests/mssql/CacheManagementTest.php
+++ b/tests/mssql/CacheManagementTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for cache invalidation in nested sets tree behaviors using SQL Server.
@@ -34,10 +34,7 @@ final class CacheManagementTest extends AbstractCacheManagement
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/ExceptionHandlingTest.php b/tests/mssql/ExceptionHandlingTest.php
index 1959560..6f5886c 100644
--- a/tests/mssql/ExceptionHandlingTest.php
+++ b/tests/mssql/ExceptionHandlingTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for exception handling in nested sets tree behaviors using SQL Server.
@@ -34,10 +34,7 @@ final class ExceptionHandlingTest extends AbstractExceptionHandling
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/ExtensibilityTest.php b/tests/mssql/ExtensibilityTest.php
index 19a05c1..2351875 100644
--- a/tests/mssql/ExtensibilityTest.php
+++ b/tests/mssql/ExtensibilityTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for extensibility in nested sets tree behaviors using SQL Server.
@@ -34,10 +34,7 @@ final class ExtensibilityTest extends AbstractExtensibility
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/NodeAppendTest.php b/tests/mssql/NodeAppendTest.php
index 43b2a2f..0cf69bd 100644
--- a/tests/mssql/NodeAppendTest.php
+++ b/tests/mssql/NodeAppendTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for node append and root promotion in nested sets tree behaviors using SQL Server.
@@ -37,10 +37,7 @@ final class NodeAppendTest extends AbstractNodeAppend
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/NodeDeleteTest.php b/tests/mssql/NodeDeleteTest.php
index b8f7b92..acf802e 100644
--- a/tests/mssql/NodeDeleteTest.php
+++ b/tests/mssql/NodeDeleteTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for node deletion in nested sets tree behaviors using SQL Server.
@@ -38,10 +38,7 @@ final class NodeDeleteTest extends AbstractNodeDelete
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/NodeInsertTest.php b/tests/mssql/NodeInsertTest.php
index fc3c064..9f70771 100644
--- a/tests/mssql/NodeInsertTest.php
+++ b/tests/mssql/NodeInsertTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for node insertion in nested sets tree behaviors using SQL Server.
@@ -36,10 +36,7 @@ final class NodeInsertTest extends AbstractNodeInsert
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/NodePrependTest.php b/tests/mssql/NodePrependTest.php
index ccd4250..b9387bd 100644
--- a/tests/mssql/NodePrependTest.php
+++ b/tests/mssql/NodePrependTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for node prepend operations in nested sets tree behaviors using SQL Server.
@@ -35,10 +35,7 @@ final class NodePrependTest extends AbstractNodePrepend
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/NodeStateTest.php b/tests/mssql/NodeStateTest.php
index 9749800..aa584ab 100644
--- a/tests/mssql/NodeStateTest.php
+++ b/tests/mssql/NodeStateTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for node state and relationship in nested sets tree behaviors using SQL Server.
@@ -34,10 +34,7 @@ final class NodeStateTest extends AbstractNodeState
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/QueryBehaviorTest.php b/tests/mssql/QueryBehaviorTest.php
index 422eb85..3e642da 100644
--- a/tests/mssql/QueryBehaviorTest.php
+++ b/tests/mssql/QueryBehaviorTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for query behavior in nested sets tree behaviors using SQL Server.
@@ -36,10 +36,7 @@ final class QueryBehaviorTest extends AbstractQueryBehavior
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/TreeTraversalTest.php b/tests/mssql/TreeTraversalTest.php
index 5cfefee..e03dd0e 100644
--- a/tests/mssql/TreeTraversalTest.php
+++ b/tests/mssql/TreeTraversalTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for tree traversal and relationship methods in nested sets tree behaviors using SQL Server.
@@ -34,10 +34,7 @@ final class TreeTraversalTest extends AbstractTreeTraversal
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mssql/ValidationAndStructureTest.php b/tests/mssql/ValidationAndStructureTest.php
index 233c938..3fce2f8 100644
--- a/tests/mssql/ValidationAndStructureTest.php
+++ b/tests/mssql/ValidationAndStructureTest.php
@@ -6,7 +6,7 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;
-use yii2\extensions\nestedsets\tests\support\MSSQLConnection;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 /**
  * Test suite for validation and structural integrity in nested sets tree behaviors using SQL Server.
@@ -35,10 +35,7 @@ final class ValidationAndStructureTest extends AbstractValidationAndStructure
 {
     protected function setUp(): void
     {
-        $this->driverName = MSSQLConnection::DRIVER_NAME->value;
-        $this->dsn = MSSQLConnection::DSN->value;
-        $this->password = MSSQLConnection::PASSWORD->value;
-        $this->username = MSSQLConnection::USERNAME->value;
+        $this->connection = DatabaseConnection::MSSQL->connection();
 
         parent::setUp();
     }
diff --git a/tests/mysql/CacheManagementTest.php b/tests/mysql/CacheManagementTest.php
index 1f5c2b4..b2128ed 100644
--- a/tests/mysql/CacheManagementTest.php
+++ b/tests/mysql/CacheManagementTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/ExceptionHandlingTest.php b/tests/mysql/ExceptionHandlingTest.php
index 6682dfb..b3fae5b 100644
--- a/tests/mysql/ExceptionHandlingTest.php
+++ b/tests/mysql/ExceptionHandlingTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/ExtensibilityTest.php b/tests/mysql/ExtensibilityTest.php
index ae2114a..e6cb273 100644
--- a/tests/mysql/ExtensibilityTest.php
+++ b/tests/mysql/ExtensibilityTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/MutationTest.php b/tests/mysql/MutationTest.php
index 53eac97..61766dd 100644
--- a/tests/mysql/MutationTest.php
+++ b/tests/mysql/MutationTest.php
@@ -5,16 +5,19 @@
 namespace yii2\extensions\nestedsets\tests\mysql;
 
 use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 use yii2\extensions\nestedsets\tests\support\model\MultipleTree;
 use yii2\extensions\nestedsets\tests\TestCase;
 
 #[Group('mutation')]
 final class MutationTest extends TestCase
 {
-    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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 
     public function testLeavesMethodRequiresLeftAttributeOrderingForConsistentResults(): void
     {
diff --git a/tests/mysql/NodeAppendTest.php b/tests/mysql/NodeAppendTest.php
index a2f885c..ffd69b7 100644
--- a/tests/mysql/NodeAppendTest.php
+++ b/tests/mysql/NodeAppendTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/NodeDeleteTest.php b/tests/mysql/NodeDeleteTest.php
index f1c1b89..61e3e02 100644
--- a/tests/mysql/NodeDeleteTest.php
+++ b/tests/mysql/NodeDeleteTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/NodeInsertTest.php b/tests/mysql/NodeInsertTest.php
index 1691012..3c87770 100644
--- a/tests/mysql/NodeInsertTest.php
+++ b/tests/mysql/NodeInsertTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/NodePrependTest.php b/tests/mysql/NodePrependTest.php
index 656995e..1d27015 100644
--- a/tests/mysql/NodePrependTest.php
+++ b/tests/mysql/NodePrependTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/NodeStateTest.php b/tests/mysql/NodeStateTest.php
index 9fd640d..3597db5 100644
--- a/tests/mysql/NodeStateTest.php
+++ b/tests/mysql/NodeStateTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/QueryBehaviorTest.php b/tests/mysql/QueryBehaviorTest.php
index 1abc4ff..f45195d 100644
--- a/tests/mysql/QueryBehaviorTest.php
+++ b/tests/mysql/QueryBehaviorTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/TreeTraversalTest.php b/tests/mysql/TreeTraversalTest.php
index 562d6b3..6cdaefe 100644
--- a/tests/mysql/TreeTraversalTest.php
+++ b/tests/mysql/TreeTraversalTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/mysql/ValidationAndStructureTest.php b/tests/mysql/ValidationAndStructureTest.php
index dae7c44..ce027f3 100644
--- a/tests/mysql/ValidationAndStructureTest.php
+++ b/tests/mysql/ValidationAndStructureTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::MYSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/CacheManagementTest.php b/tests/oracle/CacheManagementTest.php
index 96949d7..b6c5d4d 100644
--- a/tests/oracle/CacheManagementTest.php
+++ b/tests/oracle/CacheManagementTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class CacheManagementTest extends AbstractCacheManagement
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/ExceptionHandlingTest.php b/tests/oracle/ExceptionHandlingTest.php
index 15b29a1..f073036 100644
--- a/tests/oracle/ExceptionHandlingTest.php
+++ b/tests/oracle/ExceptionHandlingTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class ExceptionHandlingTest extends AbstractExceptionHandling
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/ExtensibilityTest.php b/tests/oracle/ExtensibilityTest.php
index 7df7e2f..aa43742 100644
--- a/tests/oracle/ExtensibilityTest.php
+++ b/tests/oracle/ExtensibilityTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class ExtensibilityTest extends AbstractExtensibility
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/NodeAppendTest.php b/tests/oracle/NodeAppendTest.php
index a8c5c0d..20632d2 100644
--- a/tests/oracle/NodeAppendTest.php
+++ b/tests/oracle/NodeAppendTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class NodeAppendTest extends AbstractNodeAppend
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/NodeDeleteTest.php b/tests/oracle/NodeDeleteTest.php
index 973c548..3b6e94d 100644
--- a/tests/oracle/NodeDeleteTest.php
+++ b/tests/oracle/NodeDeleteTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class NodeDeleteTest extends AbstractNodeDelete
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/NodeInsertTest.php b/tests/oracle/NodeInsertTest.php
index 88b73f8..4360ff6 100644
--- a/tests/oracle/NodeInsertTest.php
+++ b/tests/oracle/NodeInsertTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class NodeInsertTest extends AbstractNodeInsert
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/NodePrependTest.php b/tests/oracle/NodePrependTest.php
index a205529..860aca9 100644
--- a/tests/oracle/NodePrependTest.php
+++ b/tests/oracle/NodePrependTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class NodePrependTest extends AbstractNodePrepend
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/NodeStateTest.php b/tests/oracle/NodeStateTest.php
index 70a9dcc..7125bb1 100644
--- a/tests/oracle/NodeStateTest.php
+++ b/tests/oracle/NodeStateTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class NodeStateTest extends AbstractNodeState
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/QueryBehaviorTest.php b/tests/oracle/QueryBehaviorTest.php
index 048dcb8..9650905 100644
--- a/tests/oracle/QueryBehaviorTest.php
+++ b/tests/oracle/QueryBehaviorTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class QueryBehaviorTest extends AbstractQueryBehavior
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/TreeTraversalTest.php b/tests/oracle/TreeTraversalTest.php
index 0f511c4..93edb86 100644
--- a/tests/oracle/TreeTraversalTest.php
+++ b/tests/oracle/TreeTraversalTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class TreeTraversalTest extends AbstractTreeTraversal
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/oracle/ValidationAndStructureTest.php b/tests/oracle/ValidationAndStructureTest.php
index 4afaf84..7e6950f 100644
--- a/tests/oracle/ValidationAndStructureTest.php
+++ b/tests/oracle/ValidationAndStructureTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('oci')]
 final class ValidationAndStructureTest extends AbstractValidationAndStructure
 {
-    protected string $driverName = 'oci';
-    protected string|null $dsn = 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;';
-    protected string $password = 'root';
-    protected string $username = 'system';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::ORACLE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/CacheManagementTest.php b/tests/pgsql/CacheManagementTest.php
index 0578883..16934e2 100644
--- a/tests/pgsql/CacheManagementTest.php
+++ b/tests/pgsql/CacheManagementTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/ExceptionHandlingTest.php b/tests/pgsql/ExceptionHandlingTest.php
index 293f462..1818b6d 100644
--- a/tests/pgsql/ExceptionHandlingTest.php
+++ b/tests/pgsql/ExceptionHandlingTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/ExtensibilityTest.php b/tests/pgsql/ExtensibilityTest.php
index b0242c1..b624436 100644
--- a/tests/pgsql/ExtensibilityTest.php
+++ b/tests/pgsql/ExtensibilityTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/MutationTest.php b/tests/pgsql/MutationTest.php
index a6ded69..8aa5b63 100644
--- a/tests/pgsql/MutationTest.php
+++ b/tests/pgsql/MutationTest.php
@@ -5,15 +5,18 @@
 namespace yii2\extensions\nestedsets\tests\pgsql;
 
 use PHPUnit\Framework\Attributes\Group;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 use yii2\extensions\nestedsets\tests\TestCase;
 
 #[Group('mutation')]
 final class MutationTest extends TestCase
 {
-    protected string $driverName = 'pgsql';
-    protected string|null $dsn = 'pgsql:host=localhost;dbname=yiitest;port=5432;';
-    protected string $password = 'root';
-    protected string $username = 'root';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 
     public function testChildrenMethodRequiresOrderByForCorrectTreeTraversal(): void
     {
diff --git a/tests/pgsql/NodeAppendTest.php b/tests/pgsql/NodeAppendTest.php
index 742ddab..1055210 100644
--- a/tests/pgsql/NodeAppendTest.php
+++ b/tests/pgsql/NodeAppendTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/NodeDeleteTest.php b/tests/pgsql/NodeDeleteTest.php
index 521d189..21b4cff 100644
--- a/tests/pgsql/NodeDeleteTest.php
+++ b/tests/pgsql/NodeDeleteTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/NodeInsertTest.php b/tests/pgsql/NodeInsertTest.php
index 3e1fcac..f1ff34c 100644
--- a/tests/pgsql/NodeInsertTest.php
+++ b/tests/pgsql/NodeInsertTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/NodePrependTest.php b/tests/pgsql/NodePrependTest.php
index d2b56c1..3a90818 100644
--- a/tests/pgsql/NodePrependTest.php
+++ b/tests/pgsql/NodePrependTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/NodeStateTest.php b/tests/pgsql/NodeStateTest.php
index c49dedc..4f786db 100644
--- a/tests/pgsql/NodeStateTest.php
+++ b/tests/pgsql/NodeStateTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/QueryBehaviorTest.php b/tests/pgsql/QueryBehaviorTest.php
index feb1682..274f101 100644
--- a/tests/pgsql/QueryBehaviorTest.php
+++ b/tests/pgsql/QueryBehaviorTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/TreeTraversalTest.php b/tests/pgsql/TreeTraversalTest.php
index fc1c3b7..4f4f04e 100644
--- a/tests/pgsql/TreeTraversalTest.php
+++ b/tests/pgsql/TreeTraversalTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/pgsql/ValidationAndStructureTest.php b/tests/pgsql/ValidationAndStructureTest.php
index e419869..a172193 100644
--- a/tests/pgsql/ValidationAndStructureTest.php
+++ b/tests/pgsql/ValidationAndStructureTest.php
@@ -6,12 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[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';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::PGSQL->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/CacheManagementTest.php b/tests/sqlite/CacheManagementTest.php
index 40ddc1c..47238b4 100644
--- a/tests/sqlite/CacheManagementTest.php
+++ b/tests/sqlite/CacheManagementTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractCacheManagement;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class CacheManagementTest extends AbstractCacheManagement
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/ExceptionHandlingTest.php b/tests/sqlite/ExceptionHandlingTest.php
index 9cfda48..e9794ff 100644
--- a/tests/sqlite/ExceptionHandlingTest.php
+++ b/tests/sqlite/ExceptionHandlingTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExceptionHandling;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class ExceptionHandlingTest extends AbstractExceptionHandling
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/ExtensibilityTest.php b/tests/sqlite/ExtensibilityTest.php
index a898195..9f83a89 100644
--- a/tests/sqlite/ExtensibilityTest.php
+++ b/tests/sqlite/ExtensibilityTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractExtensibility;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class ExtensibilityTest extends AbstractExtensibility
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/NodeAppendTest.php b/tests/sqlite/NodeAppendTest.php
index c8a8721..0a3fa22 100644
--- a/tests/sqlite/NodeAppendTest.php
+++ b/tests/sqlite/NodeAppendTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeAppend;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class NodeAppendTest extends AbstractNodeAppend
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/NodeDeleteTest.php b/tests/sqlite/NodeDeleteTest.php
index 227ab6b..03d012b 100644
--- a/tests/sqlite/NodeDeleteTest.php
+++ b/tests/sqlite/NodeDeleteTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeDelete;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class NodeDeleteTest extends AbstractNodeDelete
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/NodeInsertTest.php b/tests/sqlite/NodeInsertTest.php
index 90cb478..f512054 100644
--- a/tests/sqlite/NodeInsertTest.php
+++ b/tests/sqlite/NodeInsertTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeInsert;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class NodeInsertTest extends AbstractNodeInsert
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/NodePrependTest.php b/tests/sqlite/NodePrependTest.php
index eb310b1..8898a63 100644
--- a/tests/sqlite/NodePrependTest.php
+++ b/tests/sqlite/NodePrependTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodePrepend;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class NodePrependTest extends AbstractNodePrepend
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/NodeStateTest.php b/tests/sqlite/NodeStateTest.php
index ff2d74b..f25959c 100644
--- a/tests/sqlite/NodeStateTest.php
+++ b/tests/sqlite/NodeStateTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractNodeState;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class NodeStateTest extends AbstractNodeState
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/QueryBehaviorTest.php b/tests/sqlite/QueryBehaviorTest.php
index e084f0c..8ab939f 100644
--- a/tests/sqlite/QueryBehaviorTest.php
+++ b/tests/sqlite/QueryBehaviorTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractQueryBehavior;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class QueryBehaviorTest extends AbstractQueryBehavior
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/TreeTraversalTest.php b/tests/sqlite/TreeTraversalTest.php
index faac023..4a4f52d 100644
--- a/tests/sqlite/TreeTraversalTest.php
+++ b/tests/sqlite/TreeTraversalTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractTreeTraversal;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class TreeTraversalTest extends AbstractTreeTraversal
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/sqlite/ValidationAndStructureTest.php b/tests/sqlite/ValidationAndStructureTest.php
index b96a027..138e609 100644
--- a/tests/sqlite/ValidationAndStructureTest.php
+++ b/tests/sqlite/ValidationAndStructureTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\Attributes\Group;
 use yii2\extensions\nestedsets\tests\base\AbstractValidationAndStructure;
+use yii2\extensions\nestedsets\tests\support\DatabaseConnection;
 
 #[Group('sqlite')]
 final class ValidationAndStructureTest extends AbstractValidationAndStructure
 {
-    protected string|null $dsn = 'sqlite::memory:';
+    protected function setUp(): void
+    {
+        $this->connection = DatabaseConnection::SQLITE->connection();
+
+        parent::setUp();
+    }
 }
diff --git a/tests/support/DatabaseConnection.php b/tests/support/DatabaseConnection.php
new file mode 100644
index 0000000..84b4f5c
--- /dev/null
+++ b/tests/support/DatabaseConnection.php
@@ -0,0 +1,109 @@
+<?php
+
+declare(strict_types=1);
+
+namespace yii2\extensions\nestedsets\tests\support;
+
+use yii\db\Connection;
+
+/**
+ * Enum for supported database connection configurations in test environments.
+ *
+ * Provides connection settings for various database drivers used in integration and unit tests, enabling consistent and
+ * repeatable test execution across multiple database backends.
+ *
+ * This enum centralizes the configuration for all supported database types, allowing test cases to switch between
+ * drivers and ensuring that connection parameters are maintained in a single location for maintainability.
+ *
+ * Key features.
+ * - Centralized configuration for MSSQL, MySQL, Oracle, PostgreSQL, and SQLite test databases.
+ * - Ensures consistent connection details for all supported drivers.
+ * - Provides connection parameters as associative arrays for use with Yii Database connection classes.
+ * - Simplifies test setup and database switching in cross-database test suites.
+ *
+ * @see Connection for Yii Database connection implementation.
+ *
+ * @copyright Copyright (C) 2023 Terabytesoftw.
+ * @license https://opensource.org/license/bsd-3-clause BSD 3-Clause License.
+ */
+enum DatabaseConnection: string
+{
+    /**
+     * SQL Server database connection configuration.
+     */
+    case MSSQL = 'sqlsrv';
+
+    /**
+     * MySQL database connection configuration.
+     */
+    case MYSQL = 'mysql';
+
+    /**
+     * Oracle database connection configuration.
+     */
+    case ORACLE = 'oci';
+
+    /**
+     * PostgreSQL database connection configuration.
+     */
+    case PGSQL = 'pgsql';
+
+    /**
+     * SQLite database connection configuration.
+     */
+    case SQLITE = 'sqlite';
+
+    /**
+     * Returns the database connection configuration for the current driver.
+     *
+     * Provides an associative array of connection parameters for the selected database type, including driver-specific
+     * DSN, credentials, and class reference for Yii Database integration. This method enables test cases to retrieve
+     * consistent connection settings for all supported database backends, facilitating cross-database testing and
+     * centralized configuration management.
+     *
+     * The returned array structure matches the requirements of {@see Connection} and can be used directly to
+     * instantiate or configure Yii Database connections in test environments.
+     *
+     * Usage example:
+     * ```php
+     * $config = DatabaseConnection::MYSQL->connection();
+     * ```
+     *
+     * @return array Connection parameters for the selected database driver.
+     *
+     * @phpstan-return string[]
+     */
+    public function connection(): array
+    {
+        return match ($this) {
+            self::MSSQL => [
+                'class' => Connection::class,
+                'dsn' => 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no',
+                'password' => 'YourStrong!Passw0rd',
+                'username' => 'SA',
+            ],
+            self::MYSQL => [
+                'class' => Connection::class,
+                'dsn' => 'mysql:host=127.0.0.1;dbname=yiitest;charset=utf8mb4',
+                'password' => 'root',
+                'username' => 'root',
+            ],
+            self::ORACLE => [
+                'class' => Connection::class,
+                'dsn' => 'oci:dbname=localhost/FREEPDB1;charset=AL32UTF8;',
+                'password' => 'root',
+                'username' => 'system',
+            ],
+            self::PGSQL => [
+                'class' => Connection::class,
+                'dsn' => 'pgsql:host=localhost;dbname=yiitest;port=5432;',
+                'password' => 'root',
+                'username' => 'root',
+            ],
+            self::SQLITE => [
+                'class' => Connection::class,
+                'dsn' => 'sqlite::memory:',
+            ],
+        };
+    }
+}
diff --git a/tests/support/MSSQLConnection.php b/tests/support/MSSQLConnection.php
deleted file mode 100644
index 043c77a..0000000
--- a/tests/support/MSSQLConnection.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace yii2\extensions\nestedsets\tests\support;
-
-/**
- * Enum for SQL Server database connection configuration constants.
- *
- * Provides named constants for SQL Server connection parameters used in test suites, including driver name, Data Source
- * Name (DSN), username, and password. This enum centralizes connection details for reuse across multiple test cases,
- * ensuring consistency and simplifying configuration management for SQL Server-based tests.
- *
- * Key features.
- * - Centralizes SQL Server connection parameters for test environments.
- * - Ensures consistent configuration across all SQL Server test cases.
- * - Simplifies updates to connection details for local and CI environments.
- *
- * @copyright Copyright (C) 2023 Terabytesoftw.
- * @license https://opensource.org/license/bsd-3-clause BSD 3-Clause License.
- */
-enum MSSQLConnection: string
-{
-    /**
-     * Database driver name.
-     */
-    case DRIVER_NAME = 'sqlsrv';
-
-    /**
-     * Data Source Name (DSN).
-     */
-    case DSN = 'sqlsrv:Server=127.0.0.1,1433;Database=yiitest;Encrypt=no';
-
-    /**
-     * Password for the database connection.
-     */
-    case PASSWORD = 'YourStrong!Passw0rd';
-
-    /**
-     * Username for the database connection.
-     */
-    case USERNAME = 'SA';
-}