diff --git a/core/lib/Drupal/Core/Asset/LibraryDiscovery.php b/core/lib/Drupal/Core/Asset/LibraryDiscovery.php
index 6dd83f7..4bcc4bc 100644
--- a/core/lib/Drupal/Core/Asset/LibraryDiscovery.php
+++ b/core/lib/Drupal/Core/Asset/LibraryDiscovery.php
@@ -87,6 +87,8 @@ public function getLibraryByName($extension, $name) {
    */
   public function clearCachedDefinitions() {
     $this->cacheTagInvalidator->invalidateTags(['library_info']);
+    $this->libraryDefinitions = [];
+    $this->collector->clear();
   }
 
 }