diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php
index 8386508..c6d7772 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php
@@ -854,6 +854,19 @@ public function testComputedFields() {
     \Drupal::state()->set('entity_test_computed_field_item_list_value', []);
     $entity = EntityTestComputedField::create([]);
     $this->assertCount(0, $entity->computed_string_field);
+
+    // Test \Drupal\Core\Field\FieldItemList::equals() for a computed field.
+    \Drupal::state()->set('entity_test_computed_field_item_list_value', ['foo computed']);
+    $entity = EntityTestComputedField::create([]);
+    $computed_item_list1 = $entity->computed_string_field;
+
+    $entity = EntityTestComputedField::create([]);
+    $computed_item_list2 = $entity->computed_string_field;
+
+    $this->assertTrue($computed_item_list1->equals($computed_item_list2));
+
+    $computed_item_list2->value = 'foo computed 2';
+    $this->assertFalse($computed_item_list1->equals($computed_item_list2));
   }
 
   /**