diff --git a/litellm/proxy/credential_endpoints/endpoints.py b/litellm/proxy/credential_endpoints/endpoints.py
index 20984f3a91c..3b2752f4cf9 100644
--- a/litellm/proxy/credential_endpoints/endpoints.py
+++ b/litellm/proxy/credential_endpoints/endpoints.py
@@ -7,7 +7,7 @@ from typing import (
     cast,  # noqa: TID251  # jsonify_object in proxy/utils.py is annotated with a bare dict
 )
 
-from fastapi import APIRouter, Depends, HTTPException, Path, Request, Response
+from fastapi import APIRouter, Depends, HTTPException, Path, Request, Response, status
 
 import litellm
 from litellm._logging import verbose_proxy_logger
@@ -23,7 +23,13 @@ from litellm.llms.base_llm.auth.identity_source import (
     InternalIssuerSource,
 )
 from litellm.llms.base_llm.auth.internal_issuer import internal_issuer_jwks_document
-from litellm.proxy._types import CommonProxyErrors, LitellmUserRoles, UserAPIKeyAuth
+from litellm.proxy._types import (
+    CommonProxyErrors,
+    LitellmUserRoles,
+    ProxyErrorTypes,
+    ProxyException,
+    UserAPIKeyAuth,
+)
 from litellm.proxy.auth.user_api_key_auth import user_api_key_auth
 from litellm.proxy.common_utils.credential_hydration import (
     hydrate_named_credential,
@@ -51,14 +57,13 @@ def _reject_non_admin_wif_fields(
     """
     if not wif_fields or user_api_key_dict.user_role == LitellmUserRoles.PROXY_ADMIN:
         return
-    raise HTTPException(
-        status_code=403,
-        detail={  # mutable-ok: starlette json.dumps()s HTTPException.detail raw, needs a real dict
-            "error": (
-                f"Only proxy admins can change {wif_fields[0]!r}, a server-owned workload identity federation "
-                "parameter."
-            )
-        },
+    raise ProxyException(
+        message=(
+            f"Only proxy admins can change {wif_fields[0]!r}, a server-owned workload identity federation parameter."
+        ),
+        type=ProxyErrorTypes.auth_error.value,
+        code=status.HTTP_403_FORBIDDEN,
+        param=wif_fields[0],
     )
 
 
@@ -422,8 +427,6 @@ async def delete_credential(
         ## DELETE FROM LITELLM ##
         litellm.credential_list = [cred for cred in litellm.credential_list if cred.credential_name != credential_name]
         return {"success": True, "message": "Credential deleted successfully"}
-    except HTTPException:
-        raise
     except Exception as e:
         raise handle_exception_on_proxy(e)
 
diff --git a/tests/test_litellm/proxy/credential_endpoints/test_endpoints.py b/tests/test_litellm/proxy/credential_endpoints/test_endpoints.py
index da679fbe6e6..fb619356e88 100644
--- a/tests/test_litellm/proxy/credential_endpoints/test_endpoints.py
+++ b/tests/test_litellm/proxy/credential_endpoints/test_endpoints.py
@@ -742,7 +742,7 @@ class TestNonAdminCannotTouchAStoredWifCredential:
             response = _delete_credential("federated-cred", auth=_as_non_admin)
 
         assert response.status_code == 403, response.text
-        assert "anthropic_keycloak_token_url" in response.text
+        assert response.json()["error"]["param"] == "anthropic_keycloak_token_url"
         repository.delete_by_name.assert_not_awaited()
 
     def test_a_stale_in_memory_copy_does_not_authorize_deleting_a_stored_wif_credential(
@@ -757,7 +757,7 @@ class TestNonAdminCannotTouchAStoredWifCredential:
             response = _delete_credential("federated-cred", auth=_as_non_admin)
 
         assert response.status_code == 403, response.text
-        assert "anthropic_keycloak_token_url" in response.text
+        assert response.json()["error"]["param"] == "anthropic_keycloak_token_url"
         repository.delete_by_name.assert_not_awaited()
 
     def test_proxy_admin_can_delete_a_stored_wif_credential(self, restore_credential_list):
@@ -839,7 +839,7 @@ class TestNonAdminCannotTouchAStoredWifCredential:
             response = _delete_credential("config-wif", auth=_as_non_admin)
 
         assert response.status_code == 403, response.text
-        assert "anthropic_keycloak_token_url" in response.text
+        assert response.json()["error"]["param"] == "anthropic_keycloak_token_url"
         repository.delete_by_name.assert_not_awaited()
         assert litellm.credential_list == [config_credential]
 
@@ -1053,7 +1053,7 @@ def test_delete_credential_answers_404_when_the_credential_does_not_exist(creden
     response = _delete_credential("definitely-not-there")
 
     assert response.status_code == 404, f"delete of a missing credential answered {response.status_code}: {response.text}"
-    assert "definitely-not-there" in response.text
+    assert "definitely-not-there" in response.json()["error"]["message"]
 
 
 def test_delete_credential_still_answers_200_and_drops_the_credential_from_memory(credential_store):