diff --git a/tests/test_fields.py b/tests/test_fields.py
index b1ad1dc66..83998742f 100644
--- a/tests/test_fields.py
+++ b/tests/test_fields.py
@@ -697,7 +697,7 @@ class TestNullBooleanField(TestBooleanField):
         None: None,
         'other': True
     }
-    field = serializers.NullBooleanField()
+    field = serializers.BooleanField(null=True)
 
 
 class TestNullableBooleanField(TestNullBooleanField):