diff --git a/src/Routing/Router.php b/src/Routing/Router.php
index 36b8f09..01aa911 100644
--- a/src/Routing/Router.php
+++ b/src/Routing/Router.php
@@ -13,7 +13,7 @@ use WellRESTed\Routing\Route\RouteInterface;
 class Router implements RouterInterface
 {
     /** @var string Key to ServerRequestInterface attribute for matched path variables */
-    public $pathVariablesAttributeKey = "pathVariables";
+    private $pathVariablesAttributeName;
     /** @var DispatcherInterface */
     private $dispatcher;
     /** @var RouteFactoryInterface */
@@ -27,12 +27,25 @@ class Router implements RouterInterface
     /** @var RouteInterface[] Hash array mapping path prefixes to routes */
     private $patternRoutes;
 
-    public function __construct(DispatcherInterface $dispatcher = null)
+    /**
+     * Create a new Router.
+     *
+     * When the router matches a route with path variables, it will add each
+     * variable as an attribute on the ServerRequestInterface by default.
+     *
+     * When $pathVariablesAttributeName is set, the router will set one
+     * attribute with the passed name to an array containing all of the path
+     * variables.
+     *
+     * @param DispatcherInterface $dispatcher Instance to use for dispatching
+     *     middleware.
+     * @param string $pathVariablesAttributeName Optionally provide all path
+     *     variables as an array stored with this attribute name
+     */
+    public function __construct(DispatcherInterface $dispatcher = null, $pathVariablesAttributeName = null)
     {
-        if ($dispatcher === null) {
-            $dispatcher = new Dispatcher();
-        }
         $this->dispatcher = $dispatcher;
+        $this->pathVariablesAttributeName = $pathVariablesAttributeName;
         $this->factory = $this->getRouteFactory($this->dispatcher);
         $this->routes = [];
         $this->staticRoutes = [];
@@ -40,6 +53,41 @@ class Router implements RouterInterface
         $this->patternRoutes = [];
     }
 
+    public function __invoke(ServerRequestInterface $request, ResponseInterface $response, $next)
+    {
+        // Use only the path for routing.
+        $requestTarget = parse_url($request->getRequestTarget(), PHP_URL_PATH);
+
+        $route = $this->getStaticRoute($requestTarget);
+        if ($route) {
+            return $route($request, $response, $next);
+        }
+
+        $route = $this->getPrefixRoute($requestTarget);
+        if ($route) {
+            return $route($request, $response, $next);
+        }
+
+        // Try each of the routes.
+        foreach ($this->patternRoutes as $route) {
+            if ($route->matchesRequestTarget($requestTarget)) {
+                $pathVariables = $route->getPathVariables();
+                if ($this->pathVariablesAttributeName) {
+                    $request = $request->withAttribute($this->pathVariablesAttributeName, $pathVariables);
+                } else {
+                    foreach ($pathVariables as $name => $value) {
+                        $request = $request->withAttribute($name, $value);
+                    }
+                }
+                return $route($request, $response, $next);
+            }
+        }
+
+        // If no route exists, set the status code of the response to 404 and
+        // return the response without propagating.
+        return $response->withStatus(404);
+    }
+
     /**
      * Register middleware with the router for a given path and method.
      *
@@ -75,35 +123,6 @@ class Router implements RouterInterface
         return $this;
     }
 
-    public function __invoke(ServerRequestInterface $request, ResponseInterface $response, $next)
-    {
-        // Use only the path for routing.
-        $requestTarget = parse_url($request->getRequestTarget(), PHP_URL_PATH);
-
-        $route = $this->getStaticRoute($requestTarget);
-        if ($route) {
-            return $route($request, $response, $next);
-        }
-
-        $route = $this->getPrefixRoute($requestTarget);
-        if ($route) {
-            return $route($request, $response, $next);
-        }
-
-        // Try each of the routes.
-        foreach ($this->patternRoutes as $route) {
-            if ($route->matchesRequestTarget($requestTarget)) {
-                $pathVariables = $route->getPathVariables();
-                $request = $request->withAttribute($this->pathVariablesAttributeKey, $pathVariables);
-                return $route($request, $response, $next);
-            }
-        }
-
-        // If no route exists, set the status code of the response to 404 and
-        // return the response without propagating.
-        return $response->withStatus(404);
-    }
-
     /**
      * @param DispatcherInterface
      * @return RouteFactoryInterface
diff --git a/test/tests/unit/Routing/RouterTest.php b/test/tests/unit/Routing/RouterTest.php
index 1e27718..ec53416 100644
--- a/test/tests/unit/Routing/RouterTest.php
+++ b/test/tests/unit/Routing/RouterTest.php
@@ -75,20 +75,8 @@ class RouterTest extends \PHPUnit_Framework_TestCase
      */
     public function testCreatesInstance()
     {
-        $routeMap = new Router($this->dispatcher->reveal());
-        $this->assertNotNull($routeMap);
-    }
-
-    /**
-     * @covers ::__construct
-     * @covers ::getRouteFactory
-     * @uses WellRESTed\Routing\Route\RouteFactory
-     * @uses WellRESTed\Dispatching\Dispatcher
-     */
-    public function testCreatesInstanceWithDispatcherByDefault()
-    {
-        $routeMap = new Router();
-        $this->assertNotNull($routeMap);
+        $router = new Router($this->dispatcher->reveal());
+        $this->assertNotNull($router);
     }
 
     // ------------------------------------------------------------------------
@@ -339,30 +327,6 @@ class RouterTest extends \PHPUnit_Framework_TestCase
         $patternRoute2->matchesRequestTarget(Argument::any())->shouldNotHaveBeenCalled();
     }
 
-    /**
-     * @covers ::__invoke
-     * @group current
-     */
-    public function testSetPathVariablesAttributeBeforeDispatchingPatternRoute()
-    {
-        $target = "/";
-        $variables = [
-            "id" => "1024",
-            "name" => "Molly"
-        ];
-
-        $this->request->getRequestTarget()->willReturn($target);
-        $this->route->getTarget()->willReturn($target);
-        $this->route->getType()->willReturn(RouteInterface::TYPE_PATTERN);
-        $this->route->matchesRequestTarget(Argument::cetera())->willReturn(true);
-        $this->route->getPathVariables()->willReturn($variables);
-
-        $this->router->register("GET", $target, "middleware");
-        $this->router->__invoke($this->request->reveal(), $this->response->reveal(), $this->next);
-
-        $this->request->withAttribute("pathVariables", $variables)->shouldHaveBeenCalled();
-    }
-
     /**
      * @covers ::__invoke
      * @covers ::registerRouteForTarget
@@ -382,6 +346,70 @@ class RouterTest extends \PHPUnit_Framework_TestCase
         $this->route->matchesRequestTarget("/my/path")->shouldHaveBeenCalled();
     }
 
+    // ------------------------------------------------------------------------
+    // Path Variables
+
+    /**
+     * @covers ::__invoke
+     * @dataProvider pathVariableProvider
+     */
+    public function testSetPathVariablesAttributeIndividually($name, $value)
+    {
+        $attributeName = "pathVariables";
+
+        $target = "/";
+        $variables = [
+            "id" => "1024",
+            "name" => "Molly"
+        ];
+
+        $this->request->getRequestTarget()->willReturn($target);
+        $this->route->getTarget()->willReturn($target);
+        $this->route->getType()->willReturn(RouteInterface::TYPE_PATTERN);
+        $this->route->matchesRequestTarget(Argument::cetera())->willReturn(true);
+        $this->route->getPathVariables()->willReturn($variables);
+
+        $this->router->__construct($this->dispatcher->reveal());
+        $this->router->register("GET", $target, "middleware");
+        $this->router->__invoke($this->request->reveal(), $this->response->reveal(), $this->next);
+
+        $this->request->withAttribute($name, $value)->shouldHaveBeenCalled();
+    }
+
+    public function pathVariableProvider()
+    {
+        return [
+            ["id", "1024"],
+            ["name", "Molly"]
+        ];
+    }
+
+    /**
+     * @covers ::__invoke
+     */
+    public function testSetPathVariablesAttributeAsArray()
+    {
+        $attributeName = "pathVariables";
+
+        $target = "/";
+        $variables = [
+            "id" => "1024",
+            "name" => "Molly"
+        ];
+
+        $this->request->getRequestTarget()->willReturn($target);
+        $this->route->getTarget()->willReturn($target);
+        $this->route->getType()->willReturn(RouteInterface::TYPE_PATTERN);
+        $this->route->matchesRequestTarget(Argument::cetera())->willReturn(true);
+        $this->route->getPathVariables()->willReturn($variables);
+
+        $this->router->__construct($this->dispatcher->reveal(), $attributeName);
+        $this->router->register("GET", $target, "middleware");
+        $this->router->__invoke($this->request->reveal(), $this->response->reveal(), $this->next);
+
+        $this->request->withAttribute("pathVariables", $variables)->shouldHaveBeenCalled();
+    }
+
     // ------------------------------------------------------------------------
     // No Matching Routes