diff --git a/flight/Engine.php b/flight/Engine.php
index 58b0859..398061e 100644
--- a/flight/Engine.php
+++ b/flight/Engine.php
@@ -64,6 +64,7 @@ use flight\net\Route;
  * @method void etag(string $id, ('strong'|'weak') $type = 'strong') Handles ETag HTTP caching.
  * @method void lastModified(int $time) Handles last modified HTTP caching.
  */
+// phpcs:ignoreFile PSR2.Methods.MethodDeclaration.Underscore
 class Engine
 {
     /** @var array<string, mixed> Stored variables. */
diff --git a/flight/core/Dispatcher.php b/flight/core/Dispatcher.php
index d91b4b2..9fd8d1e 100644
--- a/flight/core/Dispatcher.php
+++ b/flight/core/Dispatcher.php
@@ -78,7 +78,7 @@ class Dispatcher
      * Assigns a callback to an event.
      *
      * @param string $name Event name
-     * @param Closure(): (void|mixed) $callback Callback function
+     * @param Closure(): (void|mixed)|callable $callback Callback function
      *
      * @return $this
      */
diff --git a/flight/net/Router.php b/flight/net/Router.php
index 5d067ad..895b337 100644
--- a/flight/net/Router.php
+++ b/flight/net/Router.php
@@ -46,6 +46,13 @@ class Router
      */
     protected array $group_middlewares = [];
 
+    /**
+     * Allowed HTTP methods
+     *
+     * @var array<int, string>
+     */
+    protected array $allowed_methods = ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'HEAD', 'OPTIONS'];
+
     /**
      * Gets mapped routes.
      *
@@ -74,7 +81,19 @@ class Router
      */
     public function map(string $pattern, callable $callback, bool $pass_route = false, string $route_alias = ''): Route
     {
-        $url = trim($pattern);
+
+        // This means that the route ies defined in a group, but the defined route is the base
+        // url path. Note the '' in route()
+        // Ex: Flight::group('/api', function() {
+        //    Flight::route('', function() {});
+        // }
+        // Keep the space so that it can execute the below code normally
+        if ($this->group_prefix !== '') {
+            $url = ltrim($pattern);
+        } else {
+            $url = trim($pattern);
+        }
+
         $methods = ['*'];
 
         if (false !== strpos($url, ' ')) {
@@ -83,7 +102,12 @@ class Router
             $methods = explode('|', $method);
         }
 
-        $route = new Route($this->group_prefix . $url, $callback, $methods, $pass_route, $route_alias);
+        // And this finishes it off.
+        if ($this->group_prefix !== '') {
+            $url = rtrim($this->group_prefix . $url);
+        }
+
+        $route = new Route($url, $callback, $methods, $pass_route, $route_alias);
 
         // to handle group middleware
         foreach ($this->group_middlewares as $gm) {
diff --git a/tests/RouterTest.php b/tests/RouterTest.php
index f67759f..1b52ae1 100644
--- a/tests/RouterTest.php
+++ b/tests/RouterTest.php
@@ -459,6 +459,41 @@ class RouterTest extends TestCase
         $this->check('123');
     }
 
+    public function testGroupRouteWithEmptyMapPath()
+    {
+        $this->router->group('/user', function (Router $router) {
+            $router->map('', function () {
+                echo "I'm a little teapot";
+            });
+        });
+        $this->request->url = '/user';
+        $this->check('I\'m a little teapot');
+    }
+
+    public function testGroupRouteWithEmptyGetPath()
+    {
+        $this->router->group('/user', function (Router $router) {
+            $router->get('', function () {
+                echo "I'm a little teapot";
+            });
+        });
+        $this->request->url = '/user';
+        $this->request->method = 'GET';
+        $this->check('I\'m a little teapot');
+    }
+
+    public function testGroupRouteWithEmptyMultipleMethodsPath()
+    {
+        $this->router->group('/user', function (Router $router) {
+            $router->map('GET|POST ', function () {
+                echo "I'm a little teapot";
+            });
+        });
+        $this->request->url = '/user';
+        $this->request->method = 'GET';
+        $this->check('I\'m a little teapot');
+    }
+
     public function testGroupRoutesMultiParams()
     {
         $this->router->group('/user', function (Router $router) {