diff --git a/pyodk/_endpoints/forms.py b/pyodk/_endpoints/forms.py
index 74caec8..d7120d1 100644
--- a/pyodk/_endpoints/forms.py
+++ b/pyodk/_endpoints/forms.py
@@ -20,12 +20,12 @@
 class Form(bases.Model):
     projectId: int
     xmlFormId: str
-    name: str
     version: str
-    enketoId: str
     hash: str
     state: str  # open, closing, closed
     createdAt: datetime
+    name: str | None  # Null if Central couldn't parse the XForm title, or it was blank.
+    enketoId: str | None  # Null if Enketo not being used with Central.
     keyId: int | None
     updatedAt: datetime | None
     publishedAt: datetime | None
diff --git a/tests/resources/forms_data.py b/tests/resources/forms_data.py
index 1be4596..61a8aa6 100644
--- a/tests/resources/forms_data.py
+++ b/tests/resources/forms_data.py
@@ -25,7 +25,7 @@
             "projectId": 8,
             "xmlFormId": "external_52k",
             "state": "open",
-            "enketoId": "Mscnfqdz7w6Nz21gkPYdNNbmOKP6hpT",
+            "enketoId": None,
             "enketoOnceId": "0510ccec266c8e0c88e939c2597341e523535b0e18460fca7c8b4585826a157d",
             "createdAt": "2021-10-28T19:11:37.064Z",
             "updatedAt": "2021-10-28T19:11:59.047Z",
@@ -36,7 +36,7 @@
             "sha256": "1c5ffdf837c153672fbd7858753c6fa41a8e5813423932e53162016139f11ca1",
             "draftToken": None,
             "publishedAt": "2021-10-28T19:11:57.082Z",
-            "name": "External 52k",
+            "name": None,
         },
         {
             "projectId": 8,