diff --git a/tests/Serializer/PartNormalizerTest.php b/tests/Serializer/PartNormalizerTest.php
index 979254d8..39295a86 100644
--- a/tests/Serializer/PartNormalizerTest.php
+++ b/tests/Serializer/PartNormalizerTest.php
@@ -45,7 +45,9 @@ class PartNormalizerTest extends WebTestCase
     {
         //Normalizer must only support Part objects (and child classes)
         $this->assertFalse($this->service->supportsNormalization(new \stdClass()));
-        $this->assertTrue($this->service->supportsNormalization(new Part()));
+        //Part serialization should only work with csv
+        $this->assertFalse($this->service->supportsNormalization(new Part()));
+        $this->assertTrue($this->service->supportsNormalization(new Part(), 'csv'));
     }
 
     public function testNormalize(): void
@@ -59,11 +61,6 @@ class PartNormalizerTest extends WebTestCase
         $part->addPartLot($partLot1);
         $part->addPartLot($partLot2);
 
-        $data = $this->service->normalize($part, 'json', ['groups' => ['simple']]);
-        $this->assertSame('Test Part', $data['name']);
-        $this->assertSame(6.0, $data['total_instock']);
-        $this->assertSame('part', $data['type']);
-
         //Check that type field is not present in CSV export
         $data = $this->service->normalize($part, 'csv', ['groups' => ['simple']]);
         $this->assertSame('Test Part', $data['name']);