diff --git a/core/modules/taxonomy/src/TermStorage.php b/core/modules/taxonomy/src/TermStorage.php
index 061abd39e4abc0800cdf7a9b17f1cc09fddf9135..e121a1744a3ab0ea723d61fe85b469cb589e0dca 100644
--- a/core/modules/taxonomy/src/TermStorage.php
+++ b/core/modules/taxonomy/src/TermStorage.php
@@ -449,6 +449,7 @@ public function getVocabularyHierarchyType($vid) {
    * {@inheritdoc}
    */
   public function __sleep() {
+    /** @var string[] $vars */
     $vars = parent::__sleep();
     // Do not serialize static cache.
     unset($vars['ancestors'], $vars['treeChildren'], $vars['treeParents'], $vars['treeTerms'], $vars['trees'], $vars['vocabularyHierarchyType']);
diff --git a/core/phpstan-baseline.neon b/core/phpstan-baseline.neon
index e1e023376cc73249f08f388cfb8d00b701d99674..6ad81f0594f512f1e8bfd75ba4eeff5af453c67a 100644
--- a/core/phpstan-baseline.neon
+++ b/core/phpstan-baseline.neon
@@ -2030,36 +2030,6 @@ parameters:
 			count: 1
 			path: modules/taxonomy/src/TermForm.php
 
-		-
-			message: "#^Cannot unset offset 'ancestors' on array\\<int, string\\>\\.$#"
-			count: 1
-			path: modules/taxonomy/src/TermStorage.php
-
-		-
-			message: "#^Cannot unset offset 'treeChildren' on array\\<int, string\\>\\.$#"
-			count: 1
-			path: modules/taxonomy/src/TermStorage.php
-
-		-
-			message: "#^Cannot unset offset 'treeParents' on array\\<int, string\\>\\.$#"
-			count: 1
-			path: modules/taxonomy/src/TermStorage.php
-
-		-
-			message: "#^Cannot unset offset 'treeTerms' on array\\<int, string\\>\\.$#"
-			count: 1
-			path: modules/taxonomy/src/TermStorage.php
-
-		-
-			message: "#^Cannot unset offset 'trees' on array\\<int, string\\>\\.$#"
-			count: 1
-			path: modules/taxonomy/src/TermStorage.php
-
-		-
-			message: "#^Cannot unset offset 'vocabularyHierarchy…' on array\\<int, string\\>\\.$#"
-			count: 1
-			path: modules/taxonomy/src/TermStorage.php
-
 		-
 			message: "#^Method Drupal\\\\taxonomy\\\\VocabularyForm\\:\\:save\\(\\) should return int but return statement is missing\\.$#"
 			count: 1