diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab6d44e..0333db3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,14 +5,6 @@ All notable changes to Wutta-Continuum will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## v0.2.1 (2025-10-29)
-
-### Fix
-
-- add util module, w/ `model_transaction_query()`
-- refactor some more for tests + pylint
-- format all code with black
-
 ## v0.2.0 (2024-12-07)
 
 ### Feat
diff --git a/docs/api/wutta_continuum.testing.rst b/docs/api/wutta_continuum.testing.rst
deleted file mode 100644
index 4afca16..0000000
--- a/docs/api/wutta_continuum.testing.rst
+++ /dev/null
@@ -1,6 +0,0 @@
-
-``wutta_continuum.testing``
-===========================
-
-.. automodule:: wutta_continuum.testing
-   :members:
diff --git a/docs/api/wutta_continuum.util.rst b/docs/api/wutta_continuum.util.rst
deleted file mode 100644
index c337ddb..0000000
--- a/docs/api/wutta_continuum.util.rst
+++ /dev/null
@@ -1,6 +0,0 @@
-
-``wutta_continuum.util``
-========================
-
-.. automodule:: wutta_continuum.util
-   :members:
diff --git a/docs/conf.py b/docs/conf.py
index 330e71f..cf8790a 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -27,7 +27,6 @@ templates_path = ["_templates"]
 exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
 intersphinx_mapping = {
-    "sqlalchemy": ("http://docs.sqlalchemy.org/en/latest/", None),
     "sqlalchemy-continuum": (
         "https://sqlalchemy-continuum.readthedocs.io/en/latest/",
         None,
diff --git a/docs/index.rst b/docs/index.rst
index a8f656f..b4add5a 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -29,5 +29,3 @@ This package adds data versioning/history for `WuttJamaican`_, using
    api/wutta_continuum
    api/wutta_continuum.app
    api/wutta_continuum.conf
-   api/wutta_continuum.testing
-   api/wutta_continuum.util
diff --git a/pyproject.toml b/pyproject.toml
index 6f1fe7f..6c7f2a5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "Wutta-Continuum"
-version = "0.2.1"
+version = "0.2.0"
 description = "SQLAlchemy-Continuum versioning for Wutta Framework"
 readme = "README.md"
 authors = [{name = "Lance Edgar", email = "lance@wuttaproject.org"}]
diff --git a/src/wutta_continuum/conf.py b/src/wutta_continuum/conf.py
index 1cb3bd7..dc3f476 100644
--- a/src/wutta_continuum/conf.py
+++ b/src/wutta_continuum/conf.py
@@ -45,28 +45,7 @@ class WuttaContinuumConfigExtension(WuttaConfigExtension):
     key = "wutta_continuum"
 
     def startup(self, config):  # pylint: disable=empty-docstring
-        """
-        Perform final configuration setup for app startup.
-
-        This will do nothing at all, unless config enables the
-        versioning feature.  This must be done in config file and not
-        in DB settings table:
-
-        .. code-block:: ini
-
-           [wutta_continuum]
-           enable_versioning = true
-
-        Once enabled, this method will configure the integration, via
-        these steps:
-
-        1. call :func:`sqlalchemy-continuum:sqlalchemy_continuum.make_versioned()`
-        2. call :meth:`wuttjamaican:wuttjamaican.app.AppHandler.get_model()`
-        3. call :func:`sqlalchemy:sqlalchemy.orm.configure_mappers()`
-
-        For more about SQLAlchemy-Continuum see
-        :doc:`sqlalchemy-continuum:intro`.
-        """
+        """ """
         # only do this if config enables it
         if not config.get_bool(
             "wutta_continuum.enable_versioning", usedb=False, default=False
@@ -81,17 +60,14 @@ class WuttaContinuumConfigExtension(WuttaConfigExtension):
         )
         plugin = load_object(spec)
 
-        app = config.get_app()
-        if "model" in app.__dict__:
-            raise RuntimeError("something not right, app already has model")
-
-        # let sqlalchemy-continuum do its thing
+        # tell sqlalchemy-continuum to do its thing
         make_versioned(plugins=[plugin()])
 
-        # must load model *between* prev and next calls
-        app.get_model()
+        # nb. must load the model before configuring mappers
+        app = config.get_app()
+        model = app.model  # pylint: disable=unused-variable
 
-        # let sqlalchemy do its thing
+        # tell sqlalchemy to do its thing
         configure_mappers()
 
 
diff --git a/src/wutta_continuum/testing.py b/src/wutta_continuum/testing.py
deleted file mode 100644
index c9229d3..0000000
--- a/src/wutta_continuum/testing.py
+++ /dev/null
@@ -1,92 +0,0 @@
-# -*- coding: utf-8; -*-
-################################################################################
-#
-#  Wutta-Continuum -- SQLAlchemy Versioning for Wutta Framework
-#  Copyright © 2024-2025 Lance Edgar
-#
-#  This file is part of Wutta Framework.
-#
-#  Wutta Framework is free software: you can redistribute it and/or modify it
-#  under the terms of the GNU General Public License as published by the Free
-#  Software Foundation, either version 3 of the License, or (at your option) any
-#  later version.
-#
-#  Wutta Framework is distributed in the hope that it will be useful, but
-#  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-#  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-#  more details.
-#
-#  You should have received a copy of the GNU General Public License along with
-#  Wutta Framework.  If not, see <http://www.gnu.org/licenses/>.
-#
-################################################################################
-"""
-Testing utilities
-"""
-
-import sys
-
-import sqlalchemy_continuum as continuum
-
-from wuttjamaican.testing import DataTestCase
-
-from wutta_continuum.conf import WuttaContinuumConfigExtension
-
-
-class VersionTestCase(DataTestCase):
-    """
-    Base class for test suites requiring the SQLAlchemy-Continuum
-    versioning feature.
-
-    This inherits from
-    :class:`~wuttjamaican:wuttjamaican.testing.DataTestCase`.
-    """
-
-    def setUp(self):
-        self.setup_versioning()
-
-    def setup_versioning(self):
-        """
-        Do setup tasks relating to this class, as well as its parent(s):
-
-        * call :meth:`wuttjamaican:wuttjamaican.testing.DataTestCase.setup_db()`
-
-          * this will in turn call :meth:`make_config()`
-        """
-        self.setup_db()
-
-    def tearDown(self):
-        self.teardown_versioning()
-
-    def teardown_versioning(self):
-        """
-        Do teardown tasks relating to this class, as well as its parent(s):
-
-        * call :func:`sqlalchemy-continuum:sqlalchemy_continuum.remove_versioning()`
-        * call :meth:`wuttjamaican:wuttjamaican.testing.DataTestCase.teardown_db()`
-        """
-        continuum.remove_versioning()
-        continuum.versioning_manager.transaction_cls = continuum.TransactionFactory()
-        self.teardown_db()
-
-    def make_config(self, **kwargs):
-        """
-        Make and customize the config object.
-
-        We override this to explicitly enable the versioning feature.
-        """
-        config = super().make_config(**kwargs)
-        config.setdefault("wutta_continuum.enable_versioning", "true")
-
-        # nb. must purge model classes from sys.modules, so they will
-        # be reloaded and sqlalchemy-continuum can reconfigure
-        if "wuttjamaican.db.model" in sys.modules:
-            del sys.modules["wuttjamaican.db.model.batch"]
-            del sys.modules["wuttjamaican.db.model.upgrades"]
-            del sys.modules["wuttjamaican.db.model.auth"]
-            del sys.modules["wuttjamaican.db.model.base"]
-            del sys.modules["wuttjamaican.db.model"]
-
-        ext = WuttaContinuumConfigExtension()
-        ext.startup(config)
-        return config
diff --git a/src/wutta_continuum/util.py b/src/wutta_continuum/util.py
deleted file mode 100644
index 4ca64ec..0000000
--- a/src/wutta_continuum/util.py
+++ /dev/null
@@ -1,85 +0,0 @@
-# -*- coding: utf-8; -*-
-################################################################################
-#
-#  Wutta-Continuum -- SQLAlchemy Versioning for Wutta Framework
-#  Copyright © 2024-2025 Lance Edgar
-#
-#  This file is part of Wutta Framework.
-#
-#  Wutta Framework is free software: you can redistribute it and/or modify it
-#  under the terms of the GNU General Public License as published by the Free
-#  Software Foundation, either version 3 of the License, or (at your option) any
-#  later version.
-#
-#  Wutta Framework is distributed in the hope that it will be useful, but
-#  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-#  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-#  more details.
-#
-#  You should have received a copy of the GNU General Public License along with
-#  Wutta Framework.  If not, see <http://www.gnu.org/licenses/>.
-#
-################################################################################
-"""
-SQLAlchemy-Continuum utilities
-"""
-
-import sqlalchemy as sa
-from sqlalchemy import orm
-import sqlalchemy_continuum as continuum
-
-
-OPERATION_TYPES = {
-    continuum.Operation.INSERT: "INSERT",
-    continuum.Operation.UPDATE: "UPDATE",
-    continuum.Operation.DELETE: "DELETE",
-}
-
-
-def render_operation_type(operation_type):
-    """
-    Render a SQLAlchemy-Continuum ``operation_type`` from a version
-    record, for display to user.
-
-    :param operation_type: Value of same name from a version record.
-       Must be one of:
-
-       * :attr:`sqlalchemy_continuum:sqlalchemy_continuum.operation.Operation.INSERT`
-       * :attr:`sqlalchemy_continuum:sqlalchemy_continuum.operation.Operation.UPDATE`
-       * :attr:`sqlalchemy_continuum:sqlalchemy_continuum.operation.Operation.DELETE`
-
-    :returns: Display name for the operation type, as string.
-    """
-    return OPERATION_TYPES[operation_type]
-
-
-def model_transaction_query(instance, session=None, model_class=None):
-    """
-    Make a query capable of finding all SQLAlchemy-Continuum
-    ``transaction`` records associated with the given model instance.
-
-    :param instance: Instance of a versioned :term:`data model`.
-
-    :param session: Optional :term:`db session` to use for the query.
-       If not specified, will be obtained from the ``instance``.
-
-    :param model_class: Optional :term:`data model` class to query.
-       If not specified, will be obtained from the ``instance``.
-
-    :returns: SQLAlchemy query object.  Note that it will *not* have an
-       ``ORDER BY`` clause yet.
-    """
-    if not session:
-        session = orm.object_session(instance)
-    if not model_class:
-        model_class = type(instance)
-
-    txncls = continuum.transaction_class(model_class)
-    vercls = continuum.version_class(model_class)
-
-    query = session.query(txncls).join(
-        vercls,
-        sa.and_(vercls.uuid == instance.uuid, vercls.transaction_id == txncls.id),
-    )
-
-    return query
diff --git a/tests/test_conf.py b/tests/test_conf.py
index 1ea5d44..22c2873 100644
--- a/tests/test_conf.py
+++ b/tests/test_conf.py
@@ -4,45 +4,33 @@ import socket
 
 from unittest.mock import patch
 
-from wuttjamaican.testing import ConfigTestCase, DataTestCase
+from wuttjamaican.testing import DataTestCase
 
 from wutta_continuum import conf as mod
 
 
-class TestWuttaContinuumConfigExtension(ConfigTestCase):
+class TestWuttaContinuumConfigExtension(DataTestCase):
 
     def make_extension(self):
         return mod.WuttaContinuumConfigExtension()
 
-    def test_startup_without_versioning(self):
+    def test_startup(self):
         ext = self.make_extension()
+
         with patch.object(mod, "make_versioned") as make_versioned:
             with patch.object(mod, "configure_mappers") as configure_mappers:
+
+                # nothing happens by default
                 ext.startup(self.config)
                 make_versioned.assert_not_called()
                 configure_mappers.assert_not_called()
 
-    def test_startup_with_versioning(self):
-        ext = self.make_extension()
-        with patch.object(mod, "make_versioned") as make_versioned:
-            with patch.object(mod, "configure_mappers") as configure_mappers:
+                # but will if we enable it in config
                 self.config.setdefault("wutta_continuum.enable_versioning", "true")
                 ext.startup(self.config)
                 make_versioned.assert_called_once()
                 configure_mappers.assert_called_once_with()
 
-    def test_startup_with_error(self):
-        ext = self.make_extension()
-        with patch.object(mod, "make_versioned") as make_versioned:
-            with patch.object(mod, "configure_mappers") as configure_mappers:
-                self.config.setdefault("wutta_continuum.enable_versioning", "true")
-                # nb. it is an error for the model to be loaded prior to
-                # calling make_versioned() for sqlalchemy-continuum
-                self.app.get_model()
-                self.assertRaises(RuntimeError, ext.startup, self.config)
-                make_versioned.assert_not_called()
-                configure_mappers.assert_not_called()
-
 
 class TestWuttaContinuumPlugin(DataTestCase):
 
diff --git a/tests/test_util.py b/tests/test_util.py
deleted file mode 100644
index 944c861..0000000
--- a/tests/test_util.py
+++ /dev/null
@@ -1,40 +0,0 @@
-# -*- coding: utf-8; -*-
-
-from unittest import TestCase
-
-import sqlalchemy_continuum as continuum
-
-from wutta_continuum import util as mod
-from wutta_continuum.testing import VersionTestCase
-
-
-class TestRenderOperationType(TestCase):
-
-    def test_basic(self):
-        self.assertEqual(
-            mod.render_operation_type(continuum.Operation.INSERT), "INSERT"
-        )
-        self.assertEqual(
-            mod.render_operation_type(continuum.Operation.UPDATE), "UPDATE"
-        )
-        self.assertEqual(
-            mod.render_operation_type(continuum.Operation.DELETE), "DELETE"
-        )
-
-
-class TestModelTransactionQuery(VersionTestCase):
-
-    def test_basic(self):
-        model = self.app.model
-
-        user = model.User(username="fred")
-        self.session.add(user)
-        self.session.commit()
-
-        query = mod.model_transaction_query(user)
-        self.assertEqual(query.count(), 1)
-        txn = query.one()
-
-        UserVersion = continuum.version_class(model.User)
-        version = self.session.query(UserVersion).one()
-        self.assertIs(version.transaction, txn)