diff --git a/tests/test_testUtils.py b/tests/test_testUtils.py
index af1df373b..c06e35cc0 100644
--- a/tests/test_testUtils.py
+++ b/tests/test_testUtils.py
@@ -247,7 +247,7 @@ def tearDownClass(cls):
 
     def setUp(self):
         super().setUp()
-        self.butler = butlerTests.makeTestCollection(self.repo)
+        self.butler = butlerTests.makeTestCollection(self.repo, uniqueId=self.id())
 
     def _makeVisitTestData(self, dataId):
         """Create dummy datasets suitable for VisitTask.