diff --git a/core/modules/system/tests/modules/lazy_route_provider_install_test/src/PluginManager.php b/core/modules/system/tests/modules/lazy_route_provider_install_test/src/PluginManager.php
index ade379a425..cac59a7324 100644
--- a/core/modules/system/tests/modules/lazy_route_provider_install_test/src/PluginManager.php
+++ b/core/modules/system/tests/modules/lazy_route_provider_install_test/src/PluginManager.php
@@ -32,7 +32,7 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
     // Generate a URL during construction to prove that URL generation works. If
     // the route was missing an exception would be thrown. This also forces the
     // route provider to be initialized very early during a module install.
-    Url::fromRoute('system.admin')->toString();
+    \Drupal::state()->set(__CLASS__, Url::fromRoute('system.admin')->toString());
     parent::__construct('Plugin/LazyRouteProviderInstallTest', $namespaces, $module_handler, NULL, PluginID::class);
   }
 
diff --git a/core/modules/system/tests/modules/router_test_directory/router_test.install b/core/modules/system/tests/modules/router_test_directory/router_test.install
index 9c433c6769..7c718fa131 100644
--- a/core/modules/system/tests/modules/router_test_directory/router_test.install
+++ b/core/modules/system/tests/modules/router_test_directory/router_test.install
@@ -13,5 +13,5 @@
 function router_test_install() {
   // Ensure a URL can be generated for routes provided by the module during
   // installation.
-  Url::fromRoute('router_test.1')->toString();
+  \Drupal::state()->set(__FUNCTION__, Url::fromRoute('router_test.1')->toString());
 }
diff --git a/core/tests/Drupal/FunctionalTests/Routing/LazyRouteProviderInstallTest.php b/core/tests/Drupal/FunctionalTests/Routing/LazyRouteProviderInstallTest.php
index 1ce116953d..52d7341df6 100644
--- a/core/tests/Drupal/FunctionalTests/Routing/LazyRouteProviderInstallTest.php
+++ b/core/tests/Drupal/FunctionalTests/Routing/LazyRouteProviderInstallTest.php
@@ -19,6 +19,8 @@ class LazyRouteProviderInstallTest extends BrowserTestBase {
    */
   public function testInstallation() {
     $this->container->get('module_installer')->install(['router_test']);
+    $this->assertEquals('/admin', \Drupal::state()->get('Drupal\lazy_route_provider_install_test\PluginManager'));
+    $this->assertEquals('/router_test/test1', \Drupal::state()->get('router_test_install'));
   }
 
 }