diff --git a/graphene_django/tests/models.py b/graphene_django/tests/models.py
index 636f74c..735f236 100644
--- a/graphene_django/tests/models.py
+++ b/graphene_django/tests/models.py
@@ -43,7 +43,7 @@ class Reporter(models.Model):
     last_name = models.CharField(max_length=30)
     email = models.EmailField()
     pets = models.ManyToManyField("self")
-    a_choice = models.CharField(max_length=30, choices=CHOICES, blank=True)
+    a_choice = models.IntegerField(choices=CHOICES, null=True, blank=True)
     objects = models.Manager()
     doe_objects = DoeReporterManager()