diff --git a/python/lsst/ctrl/mpexec/preExecInit.py b/python/lsst/ctrl/mpexec/preExecInit.py
index 128f17c1..1e00ca7d 100644
--- a/python/lsst/ctrl/mpexec/preExecInit.py
+++ b/python/lsst/ctrl/mpexec/preExecInit.py
@@ -431,13 +431,13 @@ def _check_compatibility(datasetType: DatasetType, expected: DatasetType, is_inp
                     self.full_butler.registry.registerDatasetType(datasetType)
                 except ConflictingDefinitionError:
                     if not _check_compatibility(
-                        datasetType, self.full_butler.registry.getDatasetType(datasetType.name), is_input
+                        datasetType, self.full_butler.get_dataset_type(datasetType.name), is_input
                     ):
                         raise
             else:
                 _LOG.debug("Checking DatasetType %s against registry", datasetType)
                 try:
-                    expected = self.full_butler.registry.getDatasetType(datasetType.name)
+                    expected = self.full_butler.get_dataset_type(datasetType.name)
                 except KeyError:
                     # Likely means that --register-dataset-types is forgotten.
                     missing_datasetTypes.add(datasetType.name)
diff --git a/tests/test_cmdLineFwk.py b/tests/test_cmdLineFwk.py
index 82a802ba..5eef160e 100644
--- a/tests/test_cmdLineFwk.py
+++ b/tests/test_cmdLineFwk.py
@@ -860,14 +860,10 @@ def testSimpleQGraphOutputsFail(self):
         butler.registry.refresh()
 
         # drop one of the two outputs from one task
-        ref1 = butler.registry.findDataset(
-            "add2_dataset2", collections=args.output, instrument="INSTR", detector=0
-        )
+        ref1 = butler.find_dataset("add2_dataset2", collections=args.output, instrument="INSTR", detector=0)
         self.assertIsNotNone(ref1)
         # also drop the metadata output
-        ref2 = butler.registry.findDataset(
-            "task1_metadata", collections=args.output, instrument="INSTR", detector=0
-        )
+        ref2 = butler.find_dataset("task1_metadata", collections=args.output, instrument="INSTR", detector=0)
         self.assertIsNotNone(ref2)
         butler.pruneDatasets([ref1, ref2], disassociate=True, unstore=True, purge=True)
 
@@ -912,13 +908,13 @@ def testSimpleQGraphClobberOutputs(self):
         butler.registry.refresh()
 
         # drop one of the two outputs from one task
-        ref1 = butler.registry.findDataset(
-            "add2_dataset2", collections=args.output, dataId=dict(instrument="INSTR", detector=0)
+        ref1 = butler.find_dataset(
+            "add2_dataset2", collections=args.output, data_id=dict(instrument="INSTR", detector=0)
         )
         self.assertIsNotNone(ref1)
         # also drop the metadata output
-        ref2 = butler.registry.findDataset(
-            "task1_metadata", collections=args.output, dataId=dict(instrument="INSTR", detector=0)
+        ref2 = butler.find_dataset(
+            "task1_metadata", collections=args.output, data_id=dict(instrument="INSTR", detector=0)
         )
         self.assertIsNotNone(ref2)
         butler.pruneDatasets([ref1, ref2], disassociate=True, unstore=True, purge=True)