diff --git a/tests/Integration/ModuleDiscoveryTest.php b/tests/Integration/ModuleDiscoveryTest.php
new file mode 100644
index 0000000..b34bcab
--- /dev/null
+++ b/tests/Integration/ModuleDiscoveryTest.php
@@ -0,0 +1,110 @@
+<?php
+
+namespace Atlas\Tests\Integration;
+
+use Atlas\Router\Router;
+use Atlas\Config\Config;
+use PHPUnit\Framework\TestCase;
+
+class ModuleDiscoveryTest extends TestCase
+{
+    private string $tempDir;
+
+    protected function setUp(): void
+    {
+        $this->tempDir = sys_get_temp_dir() . '/atlas_module_test_' . uniqid();
+        mkdir($this->tempDir);
+    }
+
+    protected function tearDown(): void
+    {
+        $this->removeDirectory($this->tempDir);
+    }
+
+    private function removeDirectory(string $path): void
+    {
+        if (!is_dir($path)) return;
+        $files = array_diff(scandir($path), ['.', '..']);
+        foreach ($files as $file) {
+            (is_dir("$path/$file")) ? $this->removeDirectory("$path/$file") : unlink("$path/$file");
+        }
+        rmdir($path);
+    }
+
+    private function createModule(string $name, string $content): void
+    {
+        mkdir($this->tempDir . '/' . $name, 0777, true);
+        file_put_contents($this->tempDir . '/' . $name . '/routes.php', $content);
+    }
+
+    public function testModuleDiscoveryWithPrefix(): void
+    {
+        $routesContent = '<?php return [["method" => "GET", "path" => "/index", "handler" => "UserHandler"]];';
+        $this->createModule('User', $routesContent);
+
+        $config = new Config(['modules_path' => $this->tempDir]);
+        $router = new Router($config);
+        $router->module('User', '/user');
+
+        $routes = iterator_to_array($router->getRoutes());
+        $this->assertCount(1, $routes);
+        $this->assertSame('/user/index', $routes[0]->getPath());
+        $this->assertSame('User', $routes[0]->getModule());
+    }
+
+    public function testModuleInheritanceOfMiddlewareAndValidation(): void
+    {
+        $routesContent = '<?php return [
+            [
+                "method" => "POST", 
+                "path" => "/save", 
+                "handler" => "SaveHandler",
+                "middleware" => ["module_mid"],
+                "validation" => ["id" => "numeric"]
+            ]
+        ];';
+        $this->createModule('Admin', $routesContent);
+
+        $config = new Config(['modules_path' => $this->tempDir]);
+        $router = new Router($config);
+        
+        // Group at router level
+        $router->group(['middleware' => ['global_mid']])->module('Admin', '/admin');
+
+        $routes = iterator_to_array($router->getRoutes());
+        $this->assertCount(1, $routes);
+        $route = $routes[0];
+        
+        $this->assertSame('/admin/save', $route->getPath());
+        $this->assertContains('global_mid', $route->getMiddleware());
+        $this->assertContains('module_mid', $route->getMiddleware());
+        $this->assertArrayHasKey('id', $route->getValidation());
+        $this->assertSame('numeric', $route->getValidation()['id'][0]);
+        $this->assertSame('Admin', $route->getModule());
+    }
+
+    public function testOverlappingModuleRoutes(): void
+    {
+        // Conflict resolution: first registered wins or both stay? 
+        // Typically, router matches sequentially, so first registered wins.
+        
+        $userRoutes = '<?php return [["method" => "GET", "path" => "/profile", "handler" => "UserHandler"]];';
+        $this->createModule('User', $userRoutes);
+        
+        $adminRoutes = '<?php return [["method" => "GET", "path" => "/profile", "handler" => "AdminHandler"]];';
+        $this->createModule('Admin', $adminRoutes);
+
+        $config = new Config(['modules_path' => $this->tempDir]);
+        $router = new Router($config);
+        
+        $router->module('User', '/common');
+        $router->module('Admin', '/common');
+
+        $routes = iterator_to_array($router->getRoutes());
+        $this->assertCount(2, $routes);
+        $this->assertSame('/common/profile', $routes[0]->getPath());
+        $this->assertSame('UserHandler', $routes[0]->getHandler());
+        $this->assertSame('/common/profile', $routes[1]->getPath());
+        $this->assertSame('AdminHandler', $routes[1]->getHandler());
+    }
+}