diff --git a/src/lenskit/splitting/__init__.py b/src/lenskit/splitting/__init__.py
index 8c22d5abd..f96041d08 100644
--- a/src/lenskit/splitting/__init__.py
+++ b/src/lenskit/splitting/__init__.py
@@ -12,11 +12,11 @@
 
 from lenskit.data import Dataset
 
-from .holdout import HoldoutMethod, LastFrac, LastN, SampleFrac, SampleN
-from .records import crossfold_records, sample_records
-from .split import TTSplit
-from .temporal import split_global_time, split_temporal_fraction
-from .users import crossfold_users, sample_users
+from ._holdout import HoldoutMethod, LastFrac, LastN, SampleFrac, SampleN
+from ._records import crossfold_records, sample_records
+from ._split import TTSplit
+from ._temporal import split_global_time, split_temporal_fraction
+from ._users import crossfold_users, sample_users
 
 __all__ = [
     "TTSplit",
diff --git a/src/lenskit/splitting/holdout.py b/src/lenskit/splitting/_holdout.py
similarity index 100%
rename from src/lenskit/splitting/holdout.py
rename to src/lenskit/splitting/_holdout.py
diff --git a/src/lenskit/splitting/records.py b/src/lenskit/splitting/_records.py
similarity index 99%
rename from src/lenskit/splitting/records.py
rename to src/lenskit/splitting/_records.py
index 57b18fa01..91d6e7ad5 100644
--- a/src/lenskit/splitting/records.py
+++ b/src/lenskit/splitting/_records.py
@@ -15,7 +15,7 @@
 from lenskit.data import Dataset, DatasetBuilder, ItemListCollection, UserIDKey
 from lenskit.random import RNGInput, random_generator
 
-from .split import TTSplit
+from ._split import TTSplit
 
 _log = logging.getLogger(__name__)
 
diff --git a/src/lenskit/splitting/split.py b/src/lenskit/splitting/_split.py
similarity index 100%
rename from src/lenskit/splitting/split.py
rename to src/lenskit/splitting/_split.py
diff --git a/src/lenskit/splitting/temporal.py b/src/lenskit/splitting/_temporal.py
similarity index 99%
rename from src/lenskit/splitting/temporal.py
rename to src/lenskit/splitting/_temporal.py
index 2a04b4d3e..a4710fe3c 100644
--- a/src/lenskit/splitting/temporal.py
+++ b/src/lenskit/splitting/_temporal.py
@@ -10,7 +10,7 @@
 from lenskit.data import Dataset, DatasetBuilder, ItemListCollection
 from lenskit.logging import get_logger
 
-from .split import TTSplit
+from ._split import TTSplit
 
 _log = get_logger(__name__)
 
diff --git a/src/lenskit/splitting/users.py b/src/lenskit/splitting/_users.py
similarity index 98%
rename from src/lenskit/splitting/users.py
rename to src/lenskit/splitting/_users.py
index a1b205fea..0d4bbc886 100644
--- a/src/lenskit/splitting/users.py
+++ b/src/lenskit/splitting/_users.py
@@ -17,8 +17,8 @@
 from lenskit.logging import item_progress
 from lenskit.random import RNGInput, random_generator
 
-from .holdout import HoldoutMethod
-from .split import TTSplit
+from ._holdout import HoldoutMethod
+from ._split import TTSplit
 
 _log = logging.getLogger(__name__)
 
diff --git a/src/lenskit/tuning/_iterative.py b/src/lenskit/tuning/_iterative.py
index 72f0c7895..7b313dcb5 100644
--- a/src/lenskit/tuning/_iterative.py
+++ b/src/lenskit/tuning/_iterative.py
@@ -26,7 +26,7 @@
 from lenskit.pipeline.components import Placeholder
 from lenskit.pipeline.nodes import ComponentConstructorNode, ComponentInstanceNode
 from lenskit.random import make_seed
-from lenskit.splitting.split import TTSplit
+from lenskit.splitting import TTSplit
 from lenskit.state import ParameterContainer
 from lenskit.training import ModelTrainer, TrainingOptions, UsesTrainer
 
diff --git a/tests/batch/test_pipeline_profiling.py b/tests/batch/test_pipeline_profiling.py
index 99601e7a0..14f73a66b 100644
--- a/tests/batch/test_pipeline_profiling.py
+++ b/tests/batch/test_pipeline_profiling.py
@@ -13,7 +13,7 @@
 from lenskit.basic import BiasScorer
 from lenskit.batch import BatchPipelineRunner
 from lenskit.pipeline import PipelineProfiler, topn_pipeline
-from lenskit.splitting.split import TTSplit
+from lenskit.splitting import TTSplit
 
 from .test_batch_pipeline import MLB, ml_split, mlb
 
diff --git a/tests/splitting/test_split_holdout.py b/tests/splitting/test_split_holdout.py
index 7a01a7c2e..cef32e995 100644
--- a/tests/splitting/test_split_holdout.py
+++ b/tests/splitting/test_split_holdout.py
@@ -14,7 +14,7 @@
 import pytest
 
 from lenskit.data import Dataset
-from lenskit.splitting.holdout import LastFrac, LastN, SampleFrac, SampleN
+from lenskit.splitting import LastFrac, LastN, SampleFrac, SampleN
 
 
 def test_sample_n(ml_ds: Dataset):
diff --git a/tests/splitting/test_split_records.py b/tests/splitting/test_split_records.py
index 953f8abfd..bee92babb 100644
--- a/tests/splitting/test_split_records.py
+++ b/tests/splitting/test_split_records.py
@@ -14,7 +14,7 @@
 import pytest
 
 from lenskit.data import Dataset
-from lenskit.splitting.records import crossfold_records, sample_records
+from lenskit.splitting._records import crossfold_records, sample_records
 
 
 def test_crossfold_records(ml_ds: Dataset):
diff --git a/tests/splitting/test_split_users.py b/tests/splitting/test_split_users.py
index ed798810b..dc57c733f 100644
--- a/tests/splitting/test_split_users.py
+++ b/tests/splitting/test_split_users.py
@@ -14,8 +14,7 @@
 import pytest
 
 from lenskit.data import Dataset, from_interactions_df
-from lenskit.splitting.holdout import SampleFrac, SampleN
-from lenskit.splitting.users import crossfold_users, sample_users
+from lenskit.splitting import SampleFrac, SampleN, crossfold_users, sample_users
 
 
 def test_crossfold_users(ml_ds: Dataset):