diff --git a/CHANGELOG.md b/CHANGELOG.md
index 09a095ad..366acc98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ This version improves behaviour of loading revisions and loading datasets from l
 
 - sub-collections no longer captured when filtering with filename that starts with wildcard in wildcard mode
 - bugfix of spurious error raised when loading dataset with a revision provided
+- default_revisions_only parameter in One.list_datasets filters non-default datasets
 
 ### Added
 
diff --git a/one/api.py b/one/api.py
index 2e39dd2d..ef30d6ee 100644
--- a/one/api.py
+++ b/one/api.py
@@ -701,7 +701,7 @@ def list_subjects(self) -> List[str]:
     @util.refresh
     def list_datasets(
             self, eid=None, filename=None, collection=None, revision=None, qc=QC.FAIL,
-            ignore_qc_not_set=False, details=False, query_type=None
+            ignore_qc_not_set=False, details=False, query_type=None, default_revisions_only=False
     ) -> Union[np.ndarray, pd.DataFrame]:
         """
         Given an eid, return the datasets for those sessions.
@@ -734,6 +734,9 @@ def list_datasets(
             relative paths (collection/revision/filename) - see one.alf.spec.describe for details.
         query_type : str
             Query cache ('local') or Alyx database ('remote').
+        default_revisions_only : bool
+            When true, only matching datasets that are considered default revisions are returned.
+            If no 'default_revision' column is present, and ALFError is raised.
 
         Returns
         -------
@@ -763,6 +766,11 @@ def list_datasets(
         >>> datasets = one.list_datasets(eid, {'object': ['wheel', 'trial?']})
         """
         datasets = self._cache['datasets']
+        if default_revisions_only:
+            if 'default_revision' not in datasets.columns:
+                raise alferr.ALFError('No default revisions specified')
+            datasets = datasets[datasets['default_revision']]
+
         filter_args = dict(
             collection=collection, filename=filename, wildcards=self.wildcards, revision=revision,
             revision_last_before=False, assert_unique=False, qc=qc,
@@ -1766,11 +1774,11 @@ def describe_dataset(self, dataset_type=None):
     @util.refresh
     def list_datasets(
             self, eid=None, filename=None, collection=None, revision=None, qc=QC.FAIL,
-            ignore_qc_not_set=False, details=False, query_type=None
+            ignore_qc_not_set=False, details=False, query_type=None, default_revisions_only=False
     ) -> Union[np.ndarray, pd.DataFrame]:
         filters = dict(
-            collection=collection, filename=filename, revision=revision,
-            qc=qc, ignore_qc_not_set=ignore_qc_not_set)
+            collection=collection, filename=filename, revision=revision, qc=qc,
+            ignore_qc_not_set=ignore_qc_not_set, default_revisions_only=default_revisions_only)
         if (query_type or self.mode) != 'remote':
             return super().list_datasets(eid, details=details, query_type=query_type, **filters)
         elif not eid:
diff --git a/one/tests/test_one.py b/one/tests/test_one.py
index 267f19ed..2d240f9f 100644
--- a/one/tests/test_one.py
+++ b/one/tests/test_one.py
@@ -426,6 +426,25 @@ def test_list_datasets(self):
             self.assertIsInstance(dsets, list)
             self.assertTrue(len(dsets) == np.unique(dsets).size)
 
+        # Test default_revisions_only=True
+        with self.assertRaises(alferr.ALFError):  # should raise as no 'default_revision' column
+            self.one.list_datasets('KS005/2019-04-02/001', default_revisions_only=True)
+        # Add the column and add some alternates
+        datasets = util.revisions_datasets_table(collections=['alf'], revisions=['', '2023-01-01'])
+        datasets['default_revision'] = [False, True] * 2
+        self.one._cache.datasets['default_revision'] = True
+        self.one._cache.datasets = pd.concat([self.one._cache.datasets, datasets]).sort_index()
+        eid, *_ = datasets.index.get_level_values(0)
+        dsets = self.one.list_datasets(eid, 'spikes.*', default_revisions_only=False)
+        self.assertEqual(4, len(dsets))
+        dsets = self.one.list_datasets(eid, 'spikes.*', default_revisions_only=True)
+        self.assertEqual(2, len(dsets))
+        self.assertTrue(all('#2023-01-01#' in x for x in dsets))
+        # Should be the same with details=True
+        dsets = self.one.list_datasets(eid, 'spikes.*', default_revisions_only=True, details=True)
+        self.assertEqual(2, len(dsets))
+        self.assertTrue(all('#2023-01-01#' in x for x in dsets.rel_path))
+
     def test_list_collections(self):
         """Test One.list_collections"""
         # Test no eid
@@ -1994,8 +2013,7 @@ def test_revision_last_before(self):
         """Test one.util.filter_revision_last_before"""
         datasets = util.revisions_datasets_table()
         df = datasets[datasets.rel_path.str.startswith('alf/probe00')].copy()
-        verifiable = filter_revision_last_before(df,
-                                                 revision='2020-09-01', assert_unique=False)
+        verifiable = filter_revision_last_before(df, revision='2020-09-01', assert_unique=False)
         self.assertTrue(len(verifiable) == 2)
 
         # Remove one of the datasets' revisions to test assert unique on mixed revisions
diff --git a/one/tests/util.py b/one/tests/util.py
index fee30011..c1aa4263 100644
--- a/one/tests/util.py
+++ b/one/tests/util.py
@@ -147,7 +147,7 @@ def revisions_datasets_table(collections=('', 'alf/probe00', 'alf/probe01'),
     d = {
         'rel_path': rel_path,
         'session_path': 'subject/1900-01-01/001',
-        'file_size': None,
+        'file_size': 0,
         'hash': None,
         'exists': True,
         'qc': 'NOT_SET',