diff --git a/.env.example b/.env.example
index 18d181b..08f0883 100644
--- a/.env.example
+++ b/.env.example
@@ -15,6 +15,15 @@ LOG_LEVEL=debug
 #DB_USERNAME=root
 #DB_PASSWORD=
 
+#DB_CONNECTION=oracle
+#ORACLE_DB_HOST=127.0.0.1
+#ORACLE_DB_PORT=1521
+#ORACLE_DB_DATABASE=xe
+#ORACLE_DB_USERNAME=system
+#ORACLE_DB_PASSWORD=
+#ORACLE_DB_CHARSET=AL32UTF8
+#ORACLE_DB_PREFIX=
+
 DB_CONNECTION=sqlite
 #DB_HOST=127.0.0.1
 #DB_PORT=3306
diff --git a/config/database.php b/config/database.php
index 137ad18..3d0a971 100644
--- a/config/database.php
+++ b/config/database.php
@@ -93,6 +93,18 @@
             // 'trust_server_certificate' => env('DB_TRUST_SERVER_CERTIFICATE', 'false'),
         ],
 
+        'oracle' => [
+            'driver' => 'oracle',
+            'host' => env('ORACLE_DB_HOST', '127.0.0.1'),
+            'port' => env('ORACLE_DB_PORT', '1521'),
+            'database' => env('ORACLE_DB_DATABASE', 'xe'),
+            'username' => env('ORACLE_DB_USERNAME', 'system'),
+            'password' => env('ORACLE_DB_PASSWORD', ''),
+            'charset' => env('ORACLE_DB_CHARSET', 'AL32UTF8'),
+            'prefix' => env('ORACLE_DB_PREFIX', ''),
+            'prefix_indexes' => true,
+        ],
+
     ],
 
     /*
diff --git a/tests/Unit/InventoryTotalCostTest.php b/tests/Unit/InventoryTotalCostTest.php
index 170c2bd..8faf8b3 100644
--- a/tests/Unit/InventoryTotalCostTest.php
+++ b/tests/Unit/InventoryTotalCostTest.php
@@ -21,6 +21,6 @@ public function test_total_cost_calculation(): void
             return $item->total = $item->quantity * $item->unit_price;
         });
 
-        $this->assertEquals($totalCost, $inventories->sum('total'));
+        $this->assertEquals(round($totalCost, 2), round($inventories->sum('total'), 2));
     }
 }
diff --git a/tests/Unit/OracleDatabaseConfigTest.php b/tests/Unit/OracleDatabaseConfigTest.php
new file mode 100644
index 0000000..58b9f79
--- /dev/null
+++ b/tests/Unit/OracleDatabaseConfigTest.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Tests\Unit;
+
+use Tests\TestCase;
+
+class OracleDatabaseConfigTest extends TestCase
+{
+    public function test_oracle_database_configuration_is_present(): void
+    {
+        $config = config('database.connections.oracle');
+
+        $this->assertNotNull($config);
+        $this->assertEquals('oracle', $config['driver']);
+        $this->assertEquals(env('ORACLE_DB_HOST', '127.0.0.1'), $config['host']);
+        $this->assertEquals(env('ORACLE_DB_PORT', '1521'), $config['port']);
+        $this->assertEquals(env('ORACLE_DB_DATABASE', 'xe'), $config['database']);
+        $this->assertEquals(env('ORACLE_DB_USERNAME', 'system'), $config['username']);
+        $this->assertEquals(env('ORACLE_DB_PASSWORD', ''), $config['password']);
+        $this->assertEquals(env('ORACLE_DB_CHARSET', 'AL32UTF8'), $config['charset']);
+        $this->assertEquals(env('ORACLE_DB_PREFIX', ''), $config['prefix']);
+        $this->assertTrue($config['prefix_indexes']);
+    }
+}