diff --git a/core/modules/path_alias/src/AliasManager.php b/core/modules/path_alias/src/AliasManager.php
index 0e2df806792d3e5a30d4fe8def700fd8de83838b..9eea31934b603553e6cedf17bd9b0e17c6e76d25 100644
--- a/core/modules/path_alias/src/AliasManager.php
+++ b/core/modules/path_alias/src/AliasManager.php
@@ -221,7 +221,7 @@ public function getAliasByPath($path, $langcode = NULL) {
       if (!empty($this->preloadedPathLookups[$langcode])) {
         $this->lookupMap[$langcode] = $this->pathAliasRepository->preloadPathAlias($this->preloadedPathLookups[$langcode], $langcode);
         // Keep a record of paths with no alias to avoid querying twice.
-        $this->noAlias[$langcode] = array_flip(array_diff_key($this->preloadedPathLookups[$langcode], array_keys($this->lookupMap[$langcode])));
+        $this->noAlias[$langcode] = array_flip(array_diff($this->preloadedPathLookups[$langcode], array_keys($this->lookupMap[$langcode])));
       }
     }
 
diff --git a/core/modules/path_alias/tests/src/Unit/AliasManagerTest.php b/core/modules/path_alias/tests/src/Unit/AliasManagerTest.php
index 1bff1a5d80ae203c5f01c49ce40b525b9eea1b8b..a03417c3517c289cc73f268c195e993ad65e9a03 100644
--- a/core/modules/path_alias/tests/src/Unit/AliasManagerTest.php
+++ b/core/modules/path_alias/tests/src/Unit/AliasManagerTest.php
@@ -259,7 +259,14 @@ public function testGetAliasByPathCachedMatch() {
 
     $language = $this->setUpCurrentLanguage();
 
-    $cached_paths = [$language->getId() => [$path]];
+    // Use a set of cached paths where the tested path is in any position, not
+    // only in the first one.
+    $cached_paths = [
+      $language->getId() => [
+        '/another/path',
+        $path,
+      ],
+    ];
     $this->cache->expects($this->once())
       ->method('get')
       ->with($this->cacheKey)