diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 5a47253..dcb28f9 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -6,6 +6,9 @@
   <component name="ChangeListManager">
     <list default="true" id="a7058529-bdc4-40b4-a50d-c50564dc83f0" name="Default" comment="">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Pecee/SimpleRouter/Route/RouteGroup.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/Pecee/SimpleRouter/Route/RouteGroup.php" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/tests/Pecee/SimpleRouter/RouterPartialGroupTest.php" beforeDir="false" afterPath="$PROJECT_DIR$/tests/Pecee/SimpleRouter/RouterPartialGroupTest.php" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/tests/TestRouter.php" beforeDir="false" afterPath="$PROJECT_DIR$/tests/TestRouter.php" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/Pecee/SimpleRouter/Route/IRoute.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/Pecee/SimpleRouter/Route/IRoute.php" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/Pecee/SimpleRouter/Route/Route.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/Pecee/SimpleRouter/Route/Route.php" afterDir="false" />
@@ -311,9 +314,9 @@
       <recent name="D:\Workspace\simple-php-router\tests" />
     </key>
   </component>
-  <component name="RunManager" selected="PHPUnit.tests">
-    <configuration name="EventHandlerTest" type="PHPUnitRunConfigurationType" factoryName="PHPUnit" temporary="true">
-      <TestRunner class="EventHandlerTest" file="$PROJECT_DIR$/tests/Pecee/SimpleRouter/EventHandlerTest.php" scope="Class" />
+  <component name="RunManager" selected="PHPUnit.RouterPartialGroupTest">
+    <configuration name="RouterPartialGroupTest" type="PHPUnitRunConfigurationType" factoryName="PHPUnit" temporary="true">
+      <TestRunner class="RouterPartialGroupTest" configuration_file="$PROJECT_DIR$/phpunit.xml" file="$PROJECT_DIR$/tests/Pecee/SimpleRouter/RouterPartialGroupTest.php" scope="Class" />
       <method v="2" />
     </configuration>
     <configuration name="RouterRouteTest" type="PHPUnitRunConfigurationType" factoryName="PHPUnit" temporary="true">
@@ -333,18 +336,18 @@
     </configuration>
     <list>
       <item itemvalue="PHP Script.debug.php" />
-      <item itemvalue="PHPUnit.EventHandlerTest" />
       <item itemvalue="PHPUnit.RouterRouteTest" />
       <item itemvalue="PHPUnit.phpunit.xml" />
       <item itemvalue="PHPUnit.tests" />
+      <item itemvalue="PHPUnit.RouterPartialGroupTest" />
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="PHPUnit.RouterPartialGroupTest" />
         <item itemvalue="PHPUnit.tests" />
         <item itemvalue="PHPUnit.RouterRouteTest" />
         <item itemvalue="PHPUnit.phpunit.xml" />
         <item itemvalue="PHP Script.debug.php" />
-        <item itemvalue="PHPUnit.EventHandlerTest" />
       </list>
     </recent_temporary>
   </component>
diff --git a/src/Pecee/SimpleRouter/Route/RouteGroup.php b/src/Pecee/SimpleRouter/Route/RouteGroup.php
index 1c4cc33..e3fc8ac 100644
--- a/src/Pecee/SimpleRouter/Route/RouteGroup.php
+++ b/src/Pecee/SimpleRouter/Route/RouteGroup.php
@@ -52,8 +52,16 @@ class RouteGroup extends Route implements IGroupRoute
             return false;
         }
 
+        // Parse parameter
+
+        $prefix = $this->prefix;
+
+        foreach($this->getParameters() as $parameter => $value) {
+            $prefix = str_ireplace('{' . $parameter . '}', $value, $prefix);
+        }
+
         /* Skip if prefix doesn't match */
-        if ($this->prefix !== null && stripos($url, $this->prefix) === false) {
+        if ($this->prefix !== null && stripos($url, $prefix) === false) {
             return false;
         }
 
diff --git a/tests/Pecee/SimpleRouter/RouterPartialGroupTest.php b/tests/Pecee/SimpleRouter/RouterPartialGroupTest.php
index 21c9fe2..40e288a 100644
--- a/tests/Pecee/SimpleRouter/RouterPartialGroupTest.php
+++ b/tests/Pecee/SimpleRouter/RouterPartialGroupTest.php
@@ -25,4 +25,49 @@ class RouterPartialGroupTest extends \PHPUnit\Framework\TestCase
         $this->assertEquals('param2', $result2);
     }
 
+    /**
+     * Fixed issue with partial routes not loading child groups.
+     * Reported in issue: #456
+     */
+    public function testPartialGroupWithGroup() {
+
+        $lang = null;
+
+        $route1 = '/lang/da/test/';
+        $route2 = '/lang/da/auth';
+        $route3 = '/lang/da/auth/test';
+
+        TestRouter::partialGroup(
+            '/lang/{test}/',
+            function ($lang = 'en') use($route1, $route2, $route3) {
+
+                TestRouter::get('/test/', function () use($route1) {
+                    return $route1;
+                });
+
+                TestRouter::group(['prefix' => '/auth/'], function () use($route2, $route3) {
+
+                    TestRouter::get('/', function() use($route2) {
+                        return $route2;
+                    });
+
+                    TestRouter::get('/test', function () use($route3){
+                        return $route3;
+                    });
+
+                });
+
+            }
+        );
+
+        $test1 = TestRouter::debugOutput('/lang/da/test', 'get', false);
+        $test2 = TestRouter::debugOutput('/lang/da/auth', 'get', false);
+        $test3 = TestRouter::debugOutput('/lang/da/auth/test', 'get', false);
+
+        $this->assertEquals($test1, $route1);
+        $this->assertEquals($test2, $route2);
+        $this->assertEquals($test3, $route3);
+
+    }
+
 }
\ No newline at end of file
diff --git a/tests/TestRouter.php b/tests/TestRouter.php
index a6a5321..c6acbca 100644
--- a/tests/TestRouter.php
+++ b/tests/TestRouter.php
@@ -13,7 +13,7 @@ class TestRouter extends \Pecee\SimpleRouter\SimpleRouter
         static::start();
     }
 
-    public static function debug($testUrl, $testMethod = 'get')
+    public static function debug($testUrl, $testMethod = 'get', bool $reset = true)
     {
         try {
             static::debugNoReset($testUrl, $testMethod);
@@ -22,17 +22,19 @@ class TestRouter extends \Pecee\SimpleRouter\SimpleRouter
             throw $e;
         }
 
-        static::router()->reset();
+        if($reset === true) {
+            static::router()->reset();
+        }
 
     }
 
-    public static function debugOutput($testUrl, $testMethod = 'get')
+    public static function debugOutput($testUrl, $testMethod = 'get', bool $reset = true)
     {
         $response = null;
 
         // Route request
         ob_start();
-        static::debug($testUrl, $testMethod);
+        static::debug($testUrl, $testMethod, $reset);
         $response = ob_get_contents();
         ob_end_clean();