diff --git a/src/Utils/AST.php b/src/Utils/AST.php
index 4fab803..24bd77c 100644
--- a/src/Utils/AST.php
+++ b/src/Utils/AST.php
@@ -183,7 +183,7 @@ class AST
                     $valuesNodes[] = $itemNode;
                 }
 
-                return new ListValueNode(['values' => $valuesNodes]);
+                return new ListValueNode(['values' => new NodeList($valuesNodes)]);
             }
 
             return self::astFromValue($value, $itemType);
@@ -235,7 +235,7 @@ class AST
                 ]);
             }
 
-            return new ObjectValueNode(['fields' => $fieldNodes]);
+            return new ObjectValueNode(['fields' => new NodeList($fieldNodes)]);
         }
 
         if ($type instanceof ScalarType || $type instanceof EnumType) {
diff --git a/tests/Utils/AstFromValueTest.php b/tests/Utils/AstFromValueTest.php
index b01a73c..02e7582 100644
--- a/tests/Utils/AstFromValueTest.php
+++ b/tests/Utils/AstFromValueTest.php
@@ -10,6 +10,7 @@ use GraphQL\Language\AST\FloatValueNode;
 use GraphQL\Language\AST\IntValueNode;
 use GraphQL\Language\AST\ListValueNode;
 use GraphQL\Language\AST\NameNode;
+use GraphQL\Language\AST\NodeList;
 use GraphQL\Language\AST\NullValueNode;
 use GraphQL\Language\AST\ObjectFieldNode;
 use GraphQL\Language\AST\ObjectValueNode;
@@ -179,18 +180,18 @@ class AstFromValueTest extends TestCase
     public function testConvertsArrayValuesToListASTs() : void
     {
         $value1 = new ListValueNode([
-            'values' => [
+            'values' => new NodeList([
                 new StringValueNode(['value' => 'FOO']),
                 new StringValueNode(['value' => 'BAR']),
-            ],
+            ]),
         ]);
         self::assertEquals($value1, AST::astFromValue(['FOO', 'BAR'], Type::listOf(Type::string())));
 
         $value2 = new ListValueNode([
-            'values' => [
+            'values' => new NodeList([
                 new EnumValueNode(['value' => 'HELLO']),
                 new EnumValueNode(['value' => 'GOODBYE']),
-            ],
+            ]),
         ]);
         self::assertEquals($value2, AST::astFromValue(['HELLO', 'GOODBYE'], Type::listOf($this->myEnum())));
     }
@@ -220,10 +221,10 @@ class AstFromValueTest extends TestCase
         ]);
 
         $expected = new ObjectValueNode([
-            'fields' => [
+            'fields' => new NodeList([
                 $this->objectField('foo', new IntValueNode(['value' => '3'])),
                 $this->objectField('bar', new EnumValueNode(['value' => 'HELLO'])),
-            ],
+            ]),
         ]);
 
         $data = ['foo' => 3, 'bar' => 'HELLO'];
@@ -259,9 +260,9 @@ class AstFromValueTest extends TestCase
 
         self::assertEquals(
             new ObjectValueNode([
-                'fields' => [
+                'fields' => new NodeList([
                     $this->objectField('foo', new NullValueNode([])),
-                ],
+                ]),
             ]),
             AST::astFromValue(['foo' => null], $inputObj)
         );