diff --git a/CHANGELOG.md b/CHANGELOG.md
index ddb324cf..1c3cc900 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 - New #280: Realize `ColumnBuilder` class (@Tigrov)
 - Enh #281: Update according changes in `ColumnSchemaInterface` (@Tigrov)
 - New #282: Add `ColumnDefinitionBuilder` class (@Tigrov)
+- Enh #283: Refactor `Dsn` class (@Tigrov)
 
 ## 1.3.0 March 21, 2024
 
diff --git a/src/Dsn.php b/src/Dsn.php
index 38191676..ea0fdcf5 100644
--- a/src/Dsn.php
+++ b/src/Dsn.php
@@ -14,14 +14,14 @@
 final class Dsn extends AbstractDsn
 {
     /**
-     * @psalm-param string[] $options
+     * @psalm-param array<string,string> $options
      */
     public function __construct(
-        private string $driver,
-        private string $host,
-        private string|null $databaseName = null,
-        private string $port = '1521',
-        private array $options = []
+        string $driver = 'oci',
+        string $host = '127.0.0.1',
+        string|null $databaseName = null,
+        string $port = '1521',
+        array $options = []
     ) {
         parent::__construct($driver, $host, $databaseName, $port, $options);
     }
@@ -43,20 +43,20 @@ public function __construct(
      */
     public function asString(): string
     {
-        if (!empty($this->databaseName)) {
-            $dsn = "$this->driver:" . "dbname=$this->host:$this->port/$this->databaseName";
-        } else {
-            $dsn = "$this->driver:" . "dbname=$this->host:$this->port";
-        }
+        $driver = $this->getDriver();
+        $host = $this->getHost();
+        $databaseName = $this->getDatabaseName();
+        $port = $this->getPort();
+        $options = $this->getOptions();
 
-        $parts = [];
+        $dsn = "$driver:dbname=$host:$port";
 
-        foreach ($this->options as $key => $value) {
-            $parts[] = "$key=$value";
+        if (!empty($databaseName)) {
+            $dsn .= "/$databaseName";
         }
 
-        if (!empty($parts)) {
-            $dsn .= ';' . implode(';', $parts);
+        foreach ($options as $key => $value) {
+            $dsn .= ";$key=$value";
         }
 
         return $dsn;
diff --git a/tests/Support/TestTrait.php b/tests/Support/TestTrait.php
index 0d7e1df1..8d5c73d3 100644
--- a/tests/Support/TestTrait.php
+++ b/tests/Support/TestTrait.php
@@ -33,7 +33,7 @@ protected function getConnection(bool $fixture = false): PdoConnectionInterface
 
     protected static function getDb(): PdoConnectionInterface
     {
-        $dsn = (new Dsn('oci', 'localhost', 'XE', '1521', ['charset' => 'AL32UTF8']))->asString();
+        $dsn = (new Dsn(databaseName: 'XE', options: ['charset' => 'AL32UTF8']))->asString();
 
         return new Connection(new Driver($dsn, 'system', 'root'), DbHelper::getSchemaCache());
     }
@@ -41,7 +41,7 @@ protected static function getDb(): PdoConnectionInterface
     protected function getDsn(): string
     {
         if ($this->dsn === '') {
-            $this->dsn = (new Dsn('oci', 'localhost', 'XE', '1521', ['charset' => 'AL32UTF8']))->asString();
+            $this->dsn = (new Dsn(databaseName: 'XE', options: ['charset' => 'AL32UTF8']))->asString();
         }
 
         return $this->dsn;