.../Functional/EntityResource/EntityResourceTestBase.php | 15 ---------------
 .../field_normalization_test.services.yml                |  4 ++--
 .../text/src/Plugin/Field/FieldType/TextItemBase.php     |  2 +-
 core/modules/text/src/TextProcessed.php                  | 16 ++++++++++++----
 4 files changed, 15 insertions(+), 22 deletions(-)

diff --git a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
index 8a0a5e9..6faf028 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
@@ -1365,19 +1365,4 @@ protected function assertResourceNotAvailable(Url $url, array $request_options)
     }
   }
 
-  /**
-   * Sorts a nested array with ksort().
-   *
-   * @param $array
-   *   The nested array to sort.
-   */
-  public static function nestedKsort(&$array) {
-    ksort($array);
-    foreach ($array as &$item) {
-      if (is_array($item)) {
-        static::nestedKsort($item);
-      }
-    }
-  }
-
 }
diff --git a/core/modules/serialization/tests/modules/field_normalization_test/field_normalization_test.services.yml b/core/modules/serialization/tests/modules/field_normalization_test/field_normalization_test.services.yml
index 51fdd4a..36243e7 100644
--- a/core/modules/serialization/tests/modules/field_normalization_test/field_normalization_test.services.yml
+++ b/core/modules/serialization/tests/modules/field_normalization_test/field_normalization_test.services.yml
@@ -2,5 +2,5 @@ services:
   serializer.normalizer.silly_fielditem:
     class: Drupal\field_normalization_test\Normalization\TextItemSillyNormalizer
     tags:
-      # The priority must be higher than serializer.normalizer.text_item_base.
-      - { name: normalizer , priority: 30 }
+      # The priority must be higher than serialization.normalizer.field_item.
+      - { name: normalizer , priority: 9 }
diff --git a/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php b/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
index 144d869..a873421 100644
--- a/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
+++ b/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
@@ -60,7 +60,7 @@ public function isEmpty() {
   public function onChange($property_name, $notify = TRUE) {
     // Unset processed properties that are affected by the change.
     foreach ($this->definition->getPropertyDefinitions() as $property => $definition) {
-      if (in_array($definition->getClass(), [TextProcessed::class, TextProcessedResult::class], TRUE)) {
+      if ($definition->getClass() == '\Drupal\text\TextProcessed') {
         if ($property_name == 'format' || ($definition->getSetting('text source') == $property_name)) {
           $this->writePropertyValue($property, NULL);
         }
diff --git a/core/modules/text/src/TextProcessed.php b/core/modules/text/src/TextProcessed.php
index adbf39e..276c8ae 100644
--- a/core/modules/text/src/TextProcessed.php
+++ b/core/modules/text/src/TextProcessed.php
@@ -84,19 +84,27 @@ public function setValue($value, $notify = TRUE) {
     }
   }
 
+  /**
+   * @return string[]
+   */
   public function getCacheTags() {
-    $this->getValue();
+    $this->ensureComputedValue();
     return $this->processed->getCacheTags();
   }
 
-
+  /**
+   * {@inheritdoc}
+   */
   public function getCacheContexts() {
-    $this->getValue();
+    $this->ensureComputedValue();
     return $this->processed->getCacheContexts();
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public function getCacheMaxAge() {
-    $this->getValue();
+    $this->ensureComputedValue();
     return $this->processed->getCacheMaxAge();
   }