diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bae7589..5ee3a0e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -66,7 +66,7 @@ jobs:
 
       - name: Run tests
         run: |
-          python -W once -m testtools.run testresources.tests.test_suite
+          python -W once -m testtools.run tests.test_suite
 
   success:
     needs: ["lint", "test"]
diff --git a/Makefile b/Makefile
deleted file mode 100644
index a5ca6dd..0000000
--- a/Makefile
+++ /dev/null
@@ -1,20 +0,0 @@
-PYTHONPATH:=$(shell pwd)/lib:${PYTHONPATH}
-
-all:
-
-check:
-	PYTHONPATH=$(PYTHONPATH) python -m testtools.run discover .
-
-clean:
-	find . -name '*.pyc' -print0 | xargs -0 rm -f
-
-TAGS: lib/testresources/*.py lib/testresources/tests/*.py
-	ctags -e -R lib/testresources/
-
-tags: lib/testresources/*.py lib/testresources/tests/*.py
-	ctags -R lib/testresources/
-
-release:
-	python setup.py sdist upload bdist_wheel --sign
-
-.PHONY: all check clean
diff --git a/pyproject.toml b/pyproject.toml
index a9f4e07..a14892b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -80,4 +80,4 @@ ignore = [
 ]
 
 [tool.ruff.lint.per-file-ignores]
-"testresources/tests/*" = ["S"]
+"tests/*" = ["S"]
diff --git a/testresources/__init__.py b/testresources/__init__.py
index 3b53e9f..8d7f240 100644
--- a/testresources/__init__.py
+++ b/testresources/__init__.py
@@ -86,12 +86,6 @@ def __get_git_version() -> str | None:
         __version__ = (0, 0, 0)
 
 
-def test_suite():
-    import testresources.tests
-
-    return testresources.tests.test_suite()
-
-
 def _digraph_to_graph(digraph, prime_node_mapping):
     """Convert digraph to a graph.
 
diff --git a/testresources/tests/__init__.py b/testresources/tests/__init__.py
index 29e2ebb..50d33d1 100644
--- a/testresources/tests/__init__.py
+++ b/testresources/tests/__init__.py
@@ -13,28 +13,9 @@
 #  CONDITIONS OF ANY KIND, either express or implied.  See the license you chose
 #  for the specific language governing permissions and limitations under that
 #  license.
-#
 
 from unittest import TestResult
 
-from testresources.tests import TestUtil
-
-
-def test_suite():
-    import testresources.tests.test_optimising_test_suite
-    import testresources.tests.test_resource_graph
-    import testresources.tests.test_resourced_test_case
-    import testresources.tests.test_test_loader
-    import testresources.tests.test_test_resource
-
-    result = TestUtil.TestSuite()
-    result.addTest(testresources.tests.test_test_loader.test_suite())
-    result.addTest(testresources.tests.test_test_resource.test_suite())
-    result.addTest(testresources.tests.test_resourced_test_case.test_suite())
-    result.addTest(testresources.tests.test_resource_graph.test_suite())
-    result.addTest(testresources.tests.test_optimising_test_suite.test_suite())
-    return result
-
 
 class ResultWithoutResourceExtensions:
     """A test fake which does not have resource extensions."""
diff --git a/testresources/tests/TestUtil.py b/tests/TestUtil.py
similarity index 100%
rename from testresources/tests/TestUtil.py
rename to tests/TestUtil.py
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..254eb6f
--- /dev/null
+++ b/tests/__init__.py
@@ -0,0 +1,34 @@
+#  testresources: extensions to python unittest to allow declaritive use
+#  of resources by test cases.
+#
+#  Copyright (c) 2005-2010 Testresources Contributors
+#
+#  Licensed under either the Apache License, Version 2.0 or the BSD 3-clause
+#  license at the users choice. A copy of both licenses are available in the
+#  project source as Apache-2.0 and BSD. You may not use this file except in
+#  compliance with one of these two licences.
+#
+#  Unless required by applicable law or agreed to in writing, software distributed
+#  under these licenses is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+#  CONDITIONS OF ANY KIND, either express or implied.  See the license you chose
+#  for the specific language governing permissions and limitations under that
+#  license.
+
+
+def test_suite():
+    from . import (
+        TestUtil,
+        test_optimising_test_suite,
+        test_resource_graph,
+        test_resourced_test_case,
+        test_test_loader,
+        test_test_resource,
+    )
+
+    result = TestUtil.TestSuite()
+    result.addTest(test_test_loader.test_suite())
+    result.addTest(test_test_resource.test_suite())
+    result.addTest(test_resourced_test_case.test_suite())
+    result.addTest(test_resource_graph.test_suite())
+    result.addTest(test_optimising_test_suite.test_suite())
+    return result
diff --git a/testresources/tests/test_optimising_test_suite.py b/tests/test_optimising_test_suite.py
similarity index 99%
rename from testresources/tests/test_optimising_test_suite.py
rename to tests/test_optimising_test_suite.py
index f481039..36c3e0f 100644
--- a/testresources/tests/test_optimising_test_suite.py
+++ b/tests/test_optimising_test_suite.py
@@ -26,7 +26,7 @@
 
 
 def test_suite():
-    from testresources.tests import TestUtil
+    from . import TestUtil
 
     loader = TestUtil.TestLoader()
     result = loader.loadTestsFromName(__name__)
diff --git a/testresources/tests/test_resource_graph.py b/tests/test_resource_graph.py
similarity index 99%
rename from testresources/tests/test_resource_graph.py
rename to tests/test_resource_graph.py
index 54d7da9..aea5a4e 100644
--- a/testresources/tests/test_resource_graph.py
+++ b/tests/test_resource_graph.py
@@ -25,7 +25,7 @@
 
 
 def test_suite():
-    from testresources.tests import TestUtil
+    from . import TestUtil
 
     loader = TestUtil.TestLoader()
     result = loader.loadTestsFromName(__name__)
diff --git a/testresources/tests/test_resourced_test_case.py b/tests/test_resourced_test_case.py
similarity index 99%
rename from testresources/tests/test_resourced_test_case.py
rename to tests/test_resourced_test_case.py
index 7db8410..1a711ab 100644
--- a/testresources/tests/test_resourced_test_case.py
+++ b/tests/test_resourced_test_case.py
@@ -24,7 +24,9 @@
 
 
 def test_suite():
-    loader = testresources.tests.TestUtil.TestLoader()
+    from . import TestUtil
+
+    loader = TestUtil.TestLoader()
     result = loader.loadTestsFromName(__name__)
     return result
 
diff --git a/testresources/tests/test_test_loader.py b/tests/test_test_loader.py
similarity index 96%
rename from testresources/tests/test_test_loader.py
rename to tests/test_test_loader.py
index e348f7f..d03eebf 100644
--- a/testresources/tests/test_test_loader.py
+++ b/tests/test_test_loader.py
@@ -18,10 +18,11 @@
 import testtools
 
 from testresources import OptimisingTestSuite, TestLoader
-from testresources.tests import TestUtil
 
 
 def test_suite():
+    from . import TestUtil
+
     loader = TestUtil.TestLoader()
     result = loader.loadTestsFromName(__name__)
     return result
diff --git a/testresources/tests/test_test_resource.py b/tests/test_test_resource.py
similarity index 99%
rename from testresources/tests/test_test_resource.py
rename to tests/test_test_resource.py
index b9e9257..d50e698 100644
--- a/testresources/tests/test_test_resource.py
+++ b/tests/test_test_resource.py
@@ -26,7 +26,9 @@
 
 
 def test_suite():
-    loader = testresources.tests.TestUtil.TestLoader()
+    from . import TestUtil
+
+    loader = TestUtil.TestLoader()
     result = loader.loadTestsFromName(__name__)
     return result
 
diff --git a/tox.ini b/tox.ini
index 3a4a9df..9c59eac 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,8 @@ minversion = 4.0
 usedevelop = true
 extras =
   test
-commands = python -m testtools.run testresources.tests.test_suite
+commands =
+  python -W once -m testtools.run tests.test_suite {posargs}
 
 [testenv:ruff]
 description =
@@ -14,5 +15,5 @@ description =
 deps =
   ruff
 commands =
-  ruff format .
   ruff check --fix --unsafe-fixes --exit-non-zero-on-fix .
+  ruff format .