diff --git a/tests/test_simpleButler.py b/tests/test_simpleButler.py
index e6787a7419..ba0b117320 100644
--- a/tests/test_simpleButler.py
+++ b/tests/test_simpleButler.py
@@ -26,7 +26,6 @@
 import re
 import tempfile
 import unittest
-import uuid
 from typing import Any
 
 try:
@@ -35,7 +34,16 @@
     np = None
 
 import astropy.time
-from lsst.daf.butler import Butler, ButlerConfig, CollectionType, DatasetRef, DatasetType, Registry, Timespan
+from lsst.daf.butler import (
+    Butler,
+    ButlerConfig,
+    CollectionType,
+    DatasetId,
+    DatasetRef,
+    DatasetType,
+    Registry,
+    Timespan,
+)
 from lsst.daf.butler.registry import RegistryConfig, RegistryDefaults
 from lsst.daf.butler.tests import DatastoreMock
 from lsst.daf.butler.tests.utils import makeTestTempDir, removeTestTempDir
@@ -53,7 +61,6 @@ class SimpleButlerTestCase(unittest.TestCase):
         "lsst.daf.butler.registry.datasets.byDimensions.ByDimensionsDatasetRecordStorageManagerUUID"
     )
     datasetsImportFile = "datasets-uuid.yaml"
-    datasetsIdType = uuid.UUID
 
     def setUp(self):
         self.root = makeTestTempDir(TESTDIR)
@@ -73,11 +80,7 @@ def makeButler(self, **kwargs: Any) -> Butler:
 
         # have to make a registry first
         registryConfig = RegistryConfig(config.get("registry"))
-        if self.datasetsIdType is int:
-            with self.assertWarns(FutureWarning):
-                Registry.createFromConfig(registryConfig)
-        else:
-            Registry.createFromConfig(registryConfig)
+        Registry.createFromConfig(registryConfig)
 
         butler = Butler(config, **kwargs)
         DatastoreMock.apply(butler)
@@ -158,8 +161,8 @@ def testDatasetTransfers(self):
             butler2.import_(filename=file.name)
         datasets1 = list(butler1.registry.queryDatasets(..., collections=...))
         datasets2 = list(butler2.registry.queryDatasets(..., collections=...))
-        self.assertTrue(all(isinstance(ref.id, self.datasetsIdType) for ref in datasets1))
-        self.assertTrue(all(isinstance(ref.id, self.datasetsIdType) for ref in datasets2))
+        self.assertTrue(all(isinstance(ref.id, DatasetId) for ref in datasets1))
+        self.assertTrue(all(isinstance(ref.id, DatasetId) for ref in datasets2))
         self.assertCountEqual(
             [self.comparableRef(ref) for ref in datasets1],
             [self.comparableRef(ref) for ref in datasets2],
@@ -184,8 +187,8 @@ def testImportTwice(self):
             butler2.import_(filename=file.name)
         datasets1 = list(butler1.registry.queryDatasets(..., collections=...))
         datasets2 = list(butler2.registry.queryDatasets(..., collections=...))
-        self.assertTrue(all(isinstance(ref.id, self.datasetsIdType) for ref in datasets1))
-        self.assertTrue(all(isinstance(ref.id, self.datasetsIdType) for ref in datasets2))
+        self.assertTrue(all(isinstance(ref.id, DatasetId) for ref in datasets1))
+        self.assertTrue(all(isinstance(ref.id, DatasetId) for ref in datasets2))
         self.assertCountEqual(
             [self.comparableRef(ref) for ref in datasets1],
             [self.comparableRef(ref) for ref in datasets2],