diff --git a/api/conftest.py b/api/conftest.py
index 334794d88339..d5249fad1554 100644
--- a/api/conftest.py
+++ b/api/conftest.py
@@ -59,7 +59,13 @@
     CREATE_PROJECT,
     MANAGE_USER_GROUPS,
 )
-from organisations.subscriptions.constants import CHARGEBEE, XERO
+from organisations.subscriptions.constants import (
+    CHARGEBEE,
+    FREE_PLAN_ID,
+    SCALE_UP,
+    STARTUP,
+    XERO,
+)
 from permissions.models import PermissionModel
 from projects.models import (
     Project,
@@ -324,6 +330,33 @@ def enterprise_subscription(organisation: Organisation) -> Subscription:
     return organisation.subscription
 
 
+@pytest.fixture()
+def startup_subscription(organisation: Organisation) -> Subscription:
+    Subscription.objects.filter(organisation=organisation).update(
+        plan=STARTUP, subscription_id="subscription-id"
+    )
+    organisation.refresh_from_db()
+    return organisation.subscription
+
+
+@pytest.fixture()
+def scale_up_subscription(organisation: Organisation) -> Subscription:
+    Subscription.objects.filter(organisation=organisation).update(
+        plan=SCALE_UP, subscription_id="subscription-id"
+    )
+    organisation.refresh_from_db()
+    return organisation.subscription
+
+
+@pytest.fixture()
+def free_subscription(organisation: Organisation) -> Subscription:
+    Subscription.objects.filter(organisation=organisation).update(
+        plan=FREE_PLAN_ID, subscription_id="subscription-id"
+    )
+    organisation.refresh_from_db()
+    return organisation.subscription
+
+
 @pytest.fixture()
 def project(organisation):
     return Project.objects.create(name="Test Project", organisation=organisation)
diff --git a/api/projects/serializers.py b/api/projects/serializers.py
index a331a2fa73e5..14f8af3dfa84 100644
--- a/api/projects/serializers.py
+++ b/api/projects/serializers.py
@@ -69,7 +69,7 @@ class ProjectUpdateOrCreateSerializer(
     ReadOnlyIfNotValidPlanMixin, ProjectListSerializer
 ):
     invalid_plans_regex = r"^(free|startup.*|scale-up.*)$"
-    field_names = ("stale_flags_limit_days",)
+    field_names = ("stale_flags_limit_days", "enable_realtime_updates")
 
     def get_subscription(self) -> typing.Optional[Subscription]:
         view = self.context["view"]
diff --git a/api/tests/unit/projects/test_unit_projects_views.py b/api/tests/unit/projects/test_unit_projects_views.py
index 49a18985201f..7f949f3c6fc5 100644
--- a/api/tests/unit/projects/test_unit_projects_views.py
+++ b/api/tests/unit/projects/test_unit_projects_views.py
@@ -687,11 +687,20 @@ def test_get_project_by_uuid(client, project, mocker, settings, organisation):
 
 
 @pytest.mark.parametrize(
-    "client",
-    [(lazy_fixture("admin_master_api_key_client")), (lazy_fixture("admin_client"))],
+    "subscription, can_update_realtime",
+    [
+        (lazy_fixture("free_subscription"), False),
+        (lazy_fixture("startup_subscription"), False),
+        (lazy_fixture("scale_up_subscription"), False),
+        (lazy_fixture("enterprise_subscription"), True),
+    ],
 )
-def test_can_enable_realtime_updates_for_project(
-    client, project, mocker, settings, organisation
+def test_can_enable_realtime_updates_for_enterprise(
+    admin_client: APIClient,
+    project: Project,
+    organisation: Organisation,
+    subscription: Subscription,
+    can_update_realtime: bool,
 ):
     # Given
     url = reverse("api-v1:projects:project-detail", args=[project.id])
@@ -703,12 +712,12 @@ def test_can_enable_realtime_updates_for_project(
     }
 
     # When
-    response = client.put(url, data=data)
+    response = admin_client.put(url, data=data)
 
     # Then
     assert response.status_code == status.HTTP_200_OK
     assert response.json()["uuid"] == str(project.uuid)
-    assert response.json()["enable_realtime_updates"] is True
+    assert response.json()["enable_realtime_updates"] is can_update_realtime
 
 
 @pytest.mark.parametrize(