diff --git a/api/environments/identities/views.py b/api/environments/identities/views.py
index ddd01d90fba9..99393f25bc1a 100644
--- a/api/environments/identities/views.py
+++ b/api/environments/identities/views.py
@@ -169,8 +169,9 @@ def get(self, request):  # type: ignore[no-untyped-def]
         identifier = request.query_params.get("identifier")
         if not identifier:
             return Response(
-                {"detail": "Missing identifier"}
-            )  # TODO: add 400 status - will this break the clients?
+                {"detail": "Missing identifier"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
 
         if request.query_params.get("transient"):
             identity = Identity(