diff --git a/src/Plugin/facets/url_processor/QueryString.php b/src/Plugin/facets/url_processor/QueryString.php
index 537ba3e..cd5aafa 100644
--- a/src/Plugin/facets/url_processor/QueryString.php
+++ b/src/Plugin/facets/url_processor/QueryString.php
@@ -68,9 +68,8 @@ class QueryString extends UrlProcessorPluginBase {
     // Set the url alias from the the facet object.
     $this->urlAlias = $facet->getUrlAlias();
 
-    $s = $facet->getFacetSource()->getPath();
-    $s = str_replace('//', '/', $s);
-    $url = Url::fromUserInput($s);
+    $path = str_replace('//', '/', $facet->getFacetSource()->getPath());
+    $url = Url::fromUserInput($path);
     $url->setOption('attributes', ['rel' => 'nofollow']);
 
     /** @var \Drupal\facets\Result\ResultInterface[] $results */
diff --git a/tests/src/Unit/FacetSource/FacetSourcePluginManagerTest.php b/tests/src/Unit/FacetSource/FacetSourcePluginManagerTest.php
index ea41e74..99de6ab 100644
--- a/tests/src/Unit/FacetSource/FacetSourcePluginManagerTest.php
+++ b/tests/src/Unit/FacetSource/FacetSourcePluginManagerTest.php
@@ -84,7 +84,7 @@ class FacetSourcePluginManagerTest extends UnitTestCase {
   public function testConstruct() {
     $namespaces = new ArrayObject();
     $sut = new FacetSourcePluginManager($namespaces, $this->cache, $this->moduleHandler);
-    $this->assertInstanceOf('\Drupal\facets\FacetSource\FacetSourcePluginManager', $sut);
+    $this->assertInstanceOf(FacetSourcePluginManager::class, $sut);
   }
 
   /**