.../tests/src/Functional/Rest/EntityTestMapFieldResourceTestBase.php  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/modules/system/tests/modules/entity_test/tests/src/Functional/Rest/EntityTestMapFieldResourceTestBase.php b/core/modules/system/tests/modules/entity_test/tests/src/Functional/Rest/EntityTestMapFieldResourceTestBase.php
index e9ac106..eae226c 100644
--- a/core/modules/system/tests/modules/entity_test/tests/src/Functional/Rest/EntityTestMapFieldResourceTestBase.php
+++ b/core/modules/system/tests/modules/entity_test/tests/src/Functional/Rest/EntityTestMapFieldResourceTestBase.php
@@ -64,7 +64,7 @@ protected function createEntity() {
       'name' => 'Llama',
       'type' => 'entity_test_map_field',
       'data' => [
-        0 => static::$mapValue,
+        static::$mapValue,
       ],
     ]);
     $entity->setOwnerId(0);
@@ -110,7 +110,7 @@ protected function getExpectedNormalizedEntity() {
         ],
       ],
       'data' => [
-        0 => static::$mapValue,
+        static::$mapValue,
       ],
     ];
   }