diff --git a/core/lib/Drupal/Core/RouteProcessor/RouteProcessorCurrent.php b/core/lib/Drupal/Core/RouteProcessor/RouteProcessorCurrent.php
index 17a56b5..3fc61b9 100644
--- a/core/lib/Drupal/Core/RouteProcessor/RouteProcessorCurrent.php
+++ b/core/lib/Drupal/Core/RouteProcessor/RouteProcessorCurrent.php
@@ -39,8 +39,15 @@ public function __construct(RouteMatchInterface $route_match) {
   public function processOutbound($route_name, Route $route, array &$parameters, CacheableMetadata $cacheable_metadata = NULL) {
     if ($route_name === '<current>') {
       if ($current_route = $this->routeMatch->getRouteObject()) {
+        $requirements = $current_route->getRequirements();
+        unset($requirements['_format']);
+        unset($requirements['_method']);
+        unset($requirements['_schema']);
+        $route->setRequirements($requirements);
+
         $route->setPath($current_route->getPath());
-        $route->setRequirements($current_route->getRequirements());
+        $route->setSchemes($current_route->getSchemes());
+        $route->setMethods($current_route->getMethods());
         $route->setOptions($current_route->getOptions());
         $route->setDefaults($current_route->getDefaults());
         $parameters = array_merge($parameters, $this->routeMatch->getRawParameters()->all());
diff --git a/core/lib/Drupal/Core/Routing/UrlGenerator.php b/core/lib/Drupal/Core/Routing/UrlGenerator.php
index c7686c6..081a542 100644
--- a/core/lib/Drupal/Core/Routing/UrlGenerator.php
+++ b/core/lib/Drupal/Core/Routing/UrlGenerator.php
@@ -345,8 +345,8 @@ public function generateFromRoute($name, $parameters = array(), $options = array
     else {
       $scheme = $this->context->getScheme();
     }
-    $scheme_req = $route->getRequirement('_scheme');
-    if (isset($scheme_req) && ($req = strtolower($scheme_req)) && $scheme !== $req) {
+    $scheme_req = $route->getSchemes();
+    if ($scheme_req && ($req = $scheme_req[0]) && $scheme !== $req) {
       $scheme = $req;
     }
     $port = '';
diff --git a/core/modules/rest/src/Plugin/ResourceBase.php b/core/modules/rest/src/Plugin/ResourceBase.php
index 46f77f6..14bca5e 100644
--- a/core/modules/rest/src/Plugin/ResourceBase.php
+++ b/core/modules/rest/src/Plugin/ResourceBase.php
@@ -203,10 +203,14 @@ protected function getBaseRoute($canonical_path, $method) {
       // Pass the resource plugin ID along as default property.
       '_plugin' => $this->pluginId,
     ), array(
-      // The HTTP method is a requirement for this route.
-      '_method' => $method,
       '_permission' => "restful $lower_method $this->pluginId",
-    ));
+    ),
+      array(),
+      array(),
+      array(),
+      // The HTTP method is a requirement for this route.
+      array($method)
+    );
     return $route;
   }
 
diff --git a/core/modules/rest/src/Plugin/views/display/RestExport.php b/core/modules/rest/src/Plugin/views/display/RestExport.php
index 2efdbc7..32c0110 100644
--- a/core/modules/rest/src/Plugin/views/display/RestExport.php
+++ b/core/modules/rest/src/Plugin/views/display/RestExport.php
@@ -263,7 +263,7 @@ public function collectRoutes(RouteCollection $collection) {
     if ($route = $collection->get("view.$view_id.$display_id")) {
       $style_plugin = $this->getPlugin('style');
       // REST exports should only respond to get methods.
-      $requirements = array('_method' => 'GET');
+      $route->setMethods(['GET']);
 
       // Format as a string using pipes as a delimiter.
       $requirements['_format'] = implode('|', $style_plugin->getFormats());
diff --git a/core/modules/simpletest/src/WebTestBase.php b/core/modules/simpletest/src/WebTestBase.php
index 99cb227..0f80061 100644
--- a/core/modules/simpletest/src/WebTestBase.php
+++ b/core/modules/simpletest/src/WebTestBase.php
@@ -724,7 +724,8 @@ protected function setUp() {
     if ($this->strictConfigSchema) {
       // Add a listener to validate configuration schema on save.
       $yaml = new \Symfony\Component\Yaml\Yaml();
-      $services = $yaml->parse($directory . '/services.yml');
+      $content = file_get_contents($directory . '/services.yml');
+      $services = $yaml->parse($content);
       $services['services']['simpletest.config_schema_checker'] = [
         'class' => 'Drupal\Core\Config\Testing\ConfigSchemaChecker',
         'arguments' => ['@config.typed'],
diff --git a/core/tests/Drupal/Tests/Core/Routing/RoutingFixtures.php b/core/tests/Drupal/Tests/Core/Routing/RoutingFixtures.php
index ffbfb03..59082d6 100644
--- a/core/tests/Drupal/Tests/Core/Routing/RoutingFixtures.php
+++ b/core/tests/Drupal/Tests/Core/Routing/RoutingFixtures.php
@@ -90,15 +90,15 @@ public function sampleRouteCollection() {
     $collection = new RouteCollection();
 
     $route = new Route('path/one');
-    $route->setRequirement('_method', 'GET');
+    $route->setMethods(['GET']);
     $collection->add('route_a', $route);
 
     $route = new Route('path/one');
-    $route->setRequirement('_method', 'PUT');
+    $route->setMethods(['PUT']);
     $collection->add('route_b', $route);
 
     $route = new Route('path/two');
-    $route->setRequirement('_method', 'GET');
+    $route->setMethods(['GET']);
     $route->setRequirement('_format', 'json');
     $collection->add('route_c', $route);
 
@@ -106,7 +106,7 @@ public function sampleRouteCollection() {
     $collection->add('route_d', $route);
 
     $route = new Route('path/two');
-    $route->setRequirement('_method', 'GET|HEAD');
+    $route->setMethods(['GET', 'HEAD']);
     $route->setRequirement('_format', 'html');
     $collection->add('route_e', $route);
 
@@ -122,22 +122,22 @@ public function complexRouteCollection() {
     $collection = new RouteCollection();
 
     $route = new Route('/path/{thing}/one');
-    $route->setRequirement('_method', 'GET');
+    $route->setMethods(['GET']);
     $collection->add('route_a', $route);
 
     $route = new Route('/path/{thing}/one');
-    $route->setRequirement('_method', 'PUT');
+    $route->setMethods(['PUT']);
     $collection->add('route_b', $route);
 
     $route = new Route('/somewhere/{item}/over/the/rainbow');
-    $route->setRequirement('_method', 'GET');
+    $route->setMethods(['GET']);
     $collection->add('route_c', $route);
 
     $route = new Route('/another/{thing}/about/{item}');
     $collection->add('route_d', $route);
 
     $route = new Route('/path/add/one');
-    $route->setRequirement('_method', 'GET|HEAD');
+    $route->setMethods(['GET', 'HEAD']);
     $collection->add('route_e', $route);
 
     return $collection;
@@ -152,12 +152,12 @@ public function contentRouteCollection() {
     $collection = new RouteCollection();
 
     $route = new Route('path/three');
-    $route->setRequirement('_method', 'POST');
+    $route->setMethods(['POST']);
     $route->setRequirement('_content_type_format', 'json');
     $collection->add('route_f', $route);
 
     $route = new Route('path/three');
-    $route->setRequirement('_method', 'PATCH');
+    $route->setMethods(['PATCH']);
     $route->setRequirement('_content_type_format', 'xml');
     $collection->add('route_g', $route);
     return $collection;
diff --git a/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php b/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
index 4685727..677d214 100644
--- a/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
+++ b/core/tests/Drupal/Tests/Core/Routing/UrlGeneratorTest.php
@@ -70,7 +70,7 @@ protected function setUp() {
     $first_route = new Route('/test/one');
     $second_route = new Route('/test/two/{narf}');
     $third_route = new Route('/test/two/');
-    $fourth_route = new Route('/test/four', array(), array('_scheme' => 'https'));
+    $fourth_route = new Route('/test/four', array(), array(), array(), '', ['https']);
     $routes->add('test_1', $first_route);
     $routes->add('test_2', $second_route);
     $routes->add('test_3', $third_route);