diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2963e745..0a9c9a2e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,7 +18,7 @@
 - Enh #281: Update according changes in `ColumnSchemaInterface` (@Tigrov)
 - New #282, #291, #299, #302: Add `ColumnDefinitionBuilder` class (@Tigrov)
 - Bug #285: Fix `DMLQueryBuilder::insertBatch()` method (@Tigrov)
-- Enh #283: Refactor `Dsn` class (@Tigrov)
+- Enh #283, #344: Refactor `Dsn` class (@Tigrov)
 - Enh #286: Use constructor to create columns and initialize properties (@Tigrov)
 - Enh #288, #317: Refactor `Schema::findColumns()` method (@Tigrov)
 - Enh #289: Refactor `Schema::normalizeDefaultValue()` method and move it to `ColumnFactory` class (@Tigrov)
diff --git a/src/Dsn.php b/src/Dsn.php
index ea0fdcf5..e939552e 100644
--- a/src/Dsn.php
+++ b/src/Dsn.php
@@ -4,26 +4,27 @@
 
 namespace Yiisoft\Db\Oracle;
 
-use Yiisoft\Db\Connection\AbstractDsn;
+use Stringable;
 
 /**
- * Implement a Data Source Name (DSN) for an Oracle Server.
+ * Represents a Data Source Name (DSN) for an Oracle Server that's used to configure a {@see Driver} instance.
+ *
+ * To get DSN in string format, use the `(string)` type casting operator.
  *
  * @link https://www.php.net/manual/en/ref.pdo-oci.connection.php
  */
-final class Dsn extends AbstractDsn
+final class Dsn implements Stringable
 {
     /**
      * @psalm-param array<string,string> $options
      */
     public function __construct(
-        string $driver = 'oci',
-        string $host = '127.0.0.1',
-        string|null $databaseName = null,
-        string $port = '1521',
-        array $options = []
+        public readonly string $driver = 'oci',
+        public readonly string $host = '127.0.0.1',
+        public readonly string $databaseName = '',
+        public readonly string $port = '1521',
+        public readonly array $options = [],
     ) {
-        parent::__construct($driver, $host, $databaseName, $port, $options);
     }
 
     /**
@@ -31,31 +32,25 @@ public function __construct(
      *
      * Please refer to the [PHP manual](https://php.net/manual/en/pdo.construct.php) on the format of the DSN string.
      *
-     * The `driver` array key is used as the driver prefix of the DSN, all further key-value pairs are rendered as
-     * `key=value` and concatenated by `;`. For example:
+     * The `driver` property is used as the driver prefix of the DSN. For example:
      *
      * ```php
      * $dsn = new Dsn('oci', 'localhost', 'yiitest', '1521', ['charset' => 'AL32UTF8']);
-     * $connection = new Connection($dsn->asString(), 'system', 'root');
+     * $driver = new Driver($dsn, 'username', 'password');
+     * $connection = new Connection($driver, 'system', 'root');
      * ```
      *
      * Will result in the DSN string `oci:dbname=localhost:1521/yiitest;charset=AL32UTF8`.
      */
-    public function asString(): string
+    public function __toString(): string
     {
-        $driver = $this->getDriver();
-        $host = $this->getHost();
-        $databaseName = $this->getDatabaseName();
-        $port = $this->getPort();
-        $options = $this->getOptions();
-
-        $dsn = "$driver:dbname=$host:$port";
+        $dsn = "$this->driver:dbname=$this->host:$this->port";
 
-        if (!empty($databaseName)) {
-            $dsn .= "/$databaseName";
+        if ($this->databaseName !== '') {
+            $dsn .= "/$this->databaseName";
         }
 
-        foreach ($options as $key => $value) {
+        foreach ($this->options as $key => $value) {
             $dsn .= ";$key=$value";
         }
 
diff --git a/tests/DsnTest.php b/tests/DsnTest.php
index 9239572c..67c2e74d 100644
--- a/tests/DsnTest.php
+++ b/tests/DsnTest.php
@@ -14,46 +14,39 @@
  */
 final class DsnTest extends TestCase
 {
-    public function testAsStringWithDatabaseName(): void
+    public function testConstruct(): void
     {
-        $this->assertSame(
-            'oci:dbname=localhost:1521;charset=AL32UTF8',
-            (new Dsn('oci', 'localhost', port: '1521', options: ['charset' => 'AL32UTF8']))->asString(),
-        );
+        $dsn = new Dsn('oci', 'localhost', 'yiitest', '1522', ['charset' => 'AL32UTF8']);
+
+        $this->assertSame('oci', $dsn->driver);
+        $this->assertSame('localhost', $dsn->host);
+        $this->assertSame('yiitest', $dsn->databaseName);
+        $this->assertSame('1522', $dsn->port);
+        $this->assertSame(['charset' => 'AL32UTF8'], $dsn->options);
+        $this->assertSame('oci:dbname=localhost:1522/yiitest;charset=AL32UTF8', (string) $dsn);
     }
 
-    public function testAsStringWithDatabaseNameWithEmptyString(): void
+    public function testConstructDefaults(): void
     {
-        $this->assertSame(
-            'oci:dbname=localhost:1521;charset=AL32UTF8',
-            (new Dsn('oci', 'localhost', '', '1521', ['charset' => 'AL32UTF8']))->asString(),
-        );
+        $dsn = new Dsn();
+
+        $this->assertSame('oci', $dsn->driver);
+        $this->assertSame('127.0.0.1', $dsn->host);
+        $this->assertSame('', $dsn->databaseName);
+        $this->assertSame('1521', $dsn->port);
+        $this->assertSame([], $dsn->options);
+        $this->assertSame('oci:dbname=127.0.0.1:1521', (string) $dsn);
     }
 
-    public function testAsStringWithDatabaseNameWithNull(): void
+    public function testConstructWithEmptyPort(): void
     {
-        $this->assertSame(
-            'oci:dbname=localhost:1521;charset=AL32UTF8',
-            (new Dsn('oci', 'localhost', null, '1521', ['charset' => 'AL32UTF8']))->asString(),
-        );
-    }
-
-    /**
-     * Oracle service name it support only in version 18 and higher, for docker image gvenzl/oracle-xe:18
-     */
-    public function testAsStringWithService(): void
-    {
-        $this->assertSame(
-            'oci:dbname=localhost:1521/yiitest;charset=AL32UTF8',
-            (new Dsn('oci', 'localhost', 'yiitest', '1521', ['charset' => 'AL32UTF8']))->asString(),
-        );
-    }
-
-    public function testAsStringWithSID(): void
-    {
-        $this->assertSame(
-            'oci:dbname=localhost:1521/XE;charset=AL32UTF8',
-            (new Dsn('oci', 'localhost', 'XE', '1521', ['charset' => 'AL32UTF8']))->asString(),
-        );
+        $dsn = new Dsn('oci', 'localhost', port: '');
+
+        $this->assertSame('oci', $dsn->driver);
+        $this->assertSame('localhost', $dsn->host);
+        $this->assertSame('', $dsn->databaseName);
+        $this->assertSame('', $dsn->port);
+        $this->assertSame([], $dsn->options);
+        $this->assertSame('oci:dbname=localhost:', (string) $dsn);
     }
 }
diff --git a/tests/Support/TestTrait.php b/tests/Support/TestTrait.php
index 7e3ff72b..32a73a0b 100644
--- a/tests/Support/TestTrait.php
+++ b/tests/Support/TestTrait.php
@@ -37,12 +37,12 @@ protected function getConnection(bool $fixture = false): Connection
 
     protected static function getDb(): Connection
     {
-        $dsn = (new Dsn(
+        $dsn = (string) new Dsn(
             host: self::getHost(),
             databaseName: self::getSid(),
             port: self::getPort(),
             options: ['charset' => 'AL32UTF8'],
-        ))->asString();
+        );
 
         return new Connection(new Driver($dsn, self::getUsername(), self::getPassword()), DbHelper::getSchemaCache());
     }
@@ -50,12 +50,12 @@ protected static function getDb(): Connection
     protected function getDsn(): string
     {
         if ($this->dsn === '') {
-            $this->dsn = (new Dsn(
+            $this->dsn = (string) new Dsn(
                 host: self::getHost(),
                 databaseName: self::getSid(),
                 port: self::getPort(),
                 options: ['charset' => 'AL32UTF8'],
-            ))->asString();
+            );
         }
 
         return $this->dsn;