diff --git a/lms/djangoapps/teams/models.py b/lms/djangoapps/teams/models.py
index 8e590fbaf3..1b41a258ed 100644
--- a/lms/djangoapps/teams/models.py
+++ b/lms/djangoapps/teams/models.py
@@ -182,7 +182,8 @@ class CourseTeamMembership(models.Model):
         """Memberships are immutable, with the exception of last activity
         date.
         """
-        if name in self.immutable_fields:
+        creating_model = name == '_state' or self._state.adding
+        if not creating_model and name in self.immutable_fields:
             # Check the current value -- if it is None, then this
             # model is being created from the database and it's fine
             # to set the value. Otherwise, we're trying to overwrite
diff --git a/lms/envs/test.py b/lms/envs/test.py
index f717b65a55..f42194289b 100644
--- a/lms/envs/test.py
+++ b/lms/envs/test.py
@@ -41,6 +41,7 @@ ALLOWED_HOSTS = [
     '.testserver.fake',
     'test-site.testserver',
     'testserver.fakeother',
+    'edx.org'
 ]
 
 # Silence noisy logs to make troubleshooting easier when tests fail.