diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 516cf99..a1dea54 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
       matrix:
         python-version: ["3.9", "3.10", "3.11", "3.12"]
         # Empty is latest, head is latest from GitHub
-        pdm-version: ["", "head", "2.7.4", "2.8.2", "2.9.3", "2.10.4", "2.11.2", "2.12.2"]
+        pdm-version: [""]
 
     steps:
       - uses: actions/checkout@v4
@@ -30,13 +30,12 @@ jobs:
         with:
           cache: true
           python-version: ${{ matrix.python-version }}             # Version range or exact version of a Python version to use, the same as actions/setup-python
-          architecture: x64                # The target architecture (x86, x64) of the Python interpreter. the same as actions/setup-python
           version: ${{ matrix.pdm-version }}                   # The version of PDM to install. Leave it as empty to use the latest version from PyPI, or 'head' to use the latest version from GitHub
           prerelease: true                # Allow prerelease versions of PDM to be installed
-          enable-pep582: false             # Enable PEP 582 package loading globally
           allow-python-prereleases: true  # Allow prerelease versions of Python to be installed. For example if only 3.12-dev is available, 3.12 will fall back to 3.12-dev
       - name: Set Cache Variables
         id: set_variables
+        shell: bash
         run: |
           echo "PIP_CACHE=$(pip cache dir)" >> $GITHUB_OUTPUT
           echo "PDM_CACHE=$(pdm config cache_dir)" >> $GITHUB_OUTPUT
@@ -50,24 +49,11 @@ jobs:
 
       - name: Install dependencies
         run: |
-          pdm config venv.with_pip True
           pdm install -G :all --dev
-          pdm venv activate in-project
-          source .venv/bin/activate
 
-          # Get the pip command to run depending on matrix.pdm-version
-          # We force reinstall of pdm in the virtualenv
-          if [[ "${{ matrix.pdm-version }}" == "head" ]]; then
-            pip install "pdm @ git+https://github.com/pdm-project/pdm"
-          elif [[ "${{ matrix.pdm-version }}" == "" ]]; then
-            pip install pdm
-          else
-            pip install pdm==${{ matrix.pdm-version }}
-          fi
+      - name: Run Test with tox
+        run: pdm run tox
 
-      - name: Test with pytest
-        run: |
-          pdm run test-cov
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4
         with:
@@ -86,3 +72,7 @@ jobs:
           pdm build
           # Do not upload to PyPI, here we only want to check that the build works
       # XXX Check valid wheels?
+
+
+      - name: Check Python package
+        uses: hynek/build-and-inspect-python-package@v2
diff --git a/pdm.lock b/pdm.lock
index fa3073f..d162c9a 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -2,10 +2,10 @@
 # It is not intended for manual editing.
 
 [metadata]
-groups = ["default", "dev", "pdm", "poetry"]
+groups = ["default", "dev", "pdm", "poetry", "testtox"]
 strategy = ["cross_platform"]
 lock_version = "4.4.1"
-content_hash = "sha256:ae0c87bb7d27e2116e0b8c440b6d395aedb838958aeece5b1b703a8d070e4903"
+content_hash = "sha256:038ebe3c53dc2805fa29f2d8d0d66579327abe4e0b940097135365b54ba275fa"
 
 [[package]]
 name = "anyio"
@@ -79,6 +79,16 @@ files = [
     {file = "cachecontrol-0.14.0.tar.gz", hash = "sha256:7db1195b41c81f8274a7bbd97c956f44e8348265a1bc7641c37dfebc39f0c938"},
 ]
 
+[[package]]
+name = "cachetools"
+version = "5.3.3"
+requires_python = ">=3.7"
+summary = "Extensible memoizing collections and decorators"
+files = [
+    {file = "cachetools-5.3.3-py3-none-any.whl", hash = "sha256:0abad1021d3f8325b2fc1d2e9c8b9c9d57b04c3932657a72465447332c24d945"},
+    {file = "cachetools-5.3.3.tar.gz", hash = "sha256:ba29e2dfa0b8b556606f097407ed1aa62080ee108ab0dc5ec9d6a723a007d105"},
+]
+
 [[package]]
 name = "certifi"
 version = "2024.2.2"
@@ -154,6 +164,16 @@ files = [
     {file = "cfgv-3.4.0.tar.gz", hash = "sha256:e52591d4c5f5dead8e0f673fb16db7949d2cfb3f7da4582893288f0ded8fe560"},
 ]
 
+[[package]]
+name = "chardet"
+version = "5.2.0"
+requires_python = ">=3.7"
+summary = "Universal encoding detector for Python 3"
+files = [
+    {file = "chardet-5.2.0-py3-none-any.whl", hash = "sha256:e1cf59446890a00105fe7b7912492ea04b6e6f06d4b742b2c788469e34c82970"},
+    {file = "chardet-5.2.0.tar.gz", hash = "sha256:1b3b6ff479a8c414bc3fa2c0852995695c4a026dcd6d0633b2dd092ca39c1cf7"},
+]
+
 [[package]]
 name = "charset-normalizer"
 version = "3.3.2"
@@ -853,27 +873,27 @@ files = [
 
 [[package]]
 name = "pbs-installer"
-version = "2024.3.27"
+version = "2024.4.1"
 requires_python = ">=3.8"
 summary = "Installer for Python Build Standalone"
 files = [
-    {file = "pbs_installer-2024.3.27-py3-none-any.whl", hash = "sha256:6299ca01a91cc87033fa4176106a977da16e2484b4094ef4bacb576f822c0392"},
-    {file = "pbs_installer-2024.3.27.tar.gz", hash = "sha256:30a368d14710a5e38a57401006b4c1061f030ed06d42d69c8f5e8dd20ee25d58"},
+    {file = "pbs_installer-2024.4.1-py3-none-any.whl", hash = "sha256:762e1b5b95a48389051205c48fcd4635e946b48ab3252d2c79a8a77dc87e91ff"},
+    {file = "pbs_installer-2024.4.1.tar.gz", hash = "sha256:1f2aca82511fb9e1973b14708d7386780a8c56d111b680ae5786b3f430fa918a"},
 ]
 
 [[package]]
 name = "pbs-installer"
-version = "2024.3.27"
+version = "2024.4.1"
 extras = ["install"]
 requires_python = ">=3.8"
 summary = "Installer for Python Build Standalone"
 dependencies = [
-    "pbs-installer==2024.3.27",
+    "pbs-installer==2024.4.1",
     "zstandard>=0.21.0",
 ]
 files = [
-    {file = "pbs_installer-2024.3.27-py3-none-any.whl", hash = "sha256:6299ca01a91cc87033fa4176106a977da16e2484b4094ef4bacb576f822c0392"},
-    {file = "pbs_installer-2024.3.27.tar.gz", hash = "sha256:30a368d14710a5e38a57401006b4c1061f030ed06d42d69c8f5e8dd20ee25d58"},
+    {file = "pbs_installer-2024.4.1-py3-none-any.whl", hash = "sha256:762e1b5b95a48389051205c48fcd4635e946b48ab3252d2c79a8a77dc87e91ff"},
+    {file = "pbs_installer-2024.4.1.tar.gz", hash = "sha256:1f2aca82511fb9e1973b14708d7386780a8c56d111b680ae5786b3f430fa918a"},
 ]
 
 [[package]]
@@ -1058,6 +1078,20 @@ files = [
     {file = "pygments-2.17.2.tar.gz", hash = "sha256:da46cec9fd2de5be3a8a784f434e4c4ab670b4ff54d605c4c2717e9d49c4c367"},
 ]
 
+[[package]]
+name = "pyproject-api"
+version = "1.6.1"
+requires_python = ">=3.8"
+summary = "API to interact with the python pyproject.toml based projects"
+dependencies = [
+    "packaging>=23.1",
+    "tomli>=2.0.1; python_version < \"3.11\"",
+]
+files = [
+    {file = "pyproject_api-1.6.1-py3-none-any.whl", hash = "sha256:4c0116d60476b0786c88692cf4e325a9814965e2469c5998b830bba16b183675"},
+    {file = "pyproject_api-1.6.1.tar.gz", hash = "sha256:1817dc018adc0d1ff9ca1ed8c60e1623d5aaca40814b953af14a9cf9a5cae538"},
+]
+
 [[package]]
 name = "pyproject-hooks"
 version = "1.0.0"
@@ -1446,6 +1480,55 @@ files = [
     {file = "tomlkit-0.12.4.tar.gz", hash = "sha256:7ca1cfc12232806517a8515047ba66a19369e71edf2439d0f5824f91032b6cc3"},
 ]
 
+[[package]]
+name = "tox"
+version = "4.14.2"
+requires_python = ">=3.8"
+summary = "tox is a generic virtualenv management and test command line tool"
+dependencies = [
+    "cachetools>=5.3.2",
+    "chardet>=5.2",
+    "colorama>=0.4.6",
+    "filelock>=3.13.1",
+    "packaging>=23.2",
+    "platformdirs>=4.1",
+    "pluggy>=1.3",
+    "pyproject-api>=1.6.1",
+    "tomli>=2.0.1; python_version < \"3.11\"",
+    "virtualenv>=20.25",
+]
+files = [
+    {file = "tox-4.14.2-py3-none-any.whl", hash = "sha256:2900c4eb7b716af4a928a7fdc2ed248ad6575294ed7cfae2ea41203937422847"},
+    {file = "tox-4.14.2.tar.gz", hash = "sha256:0defb44f6dafd911b61788325741cc6b2e12ea71f987ac025ad4d649f1f1a104"},
+]
+
+[[package]]
+name = "tox-gh"
+version = "1.3.1"
+requires_python = ">=3.7"
+summary = "Seamless integration of tox into GitHub Actions."
+dependencies = [
+    "tox>=4.6",
+]
+files = [
+    {file = "tox_gh-1.3.1-py3-none-any.whl", hash = "sha256:c671c62ce23ae519a557c3da81e9aa7e35b3a66c69bad71908e595921f83e82d"},
+    {file = "tox_gh-1.3.1.tar.gz", hash = "sha256:594af90b740c14735c41b914b41db2d2aa0360929a1746af32bda4b9fef9bf3d"},
+]
+
+[[package]]
+name = "tox-pdm"
+version = "0.7.2"
+requires_python = ">=3.7"
+summary = "A plugin for tox that utilizes PDM as the package manager and installer"
+dependencies = [
+    "tomli; python_version < \"3.11\"",
+    "tox>=4.0",
+]
+files = [
+    {file = "tox_pdm-0.7.2-py3-none-any.whl", hash = "sha256:12f6215416b7acd00a80a9e7128f3dc3e3c89308d60707f5d0a24abdf83ac104"},
+    {file = "tox_pdm-0.7.2.tar.gz", hash = "sha256:a841a7e1e942a71805624703b9a6d286663bd6af79bba6130ba756975c315308"},
+]
+
 [[package]]
 name = "trove-classifiers"
 version = "2024.3.25"
diff --git a/pyproject.toml b/pyproject.toml
index cfa6a60..c4e2f06 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,6 +32,7 @@ dynamic = [
 dependencies = [
   "strictyaml>=1.7.3",
   'tomli>=2; python_version < "3.11"',
+  'typing-extensions; python_version < "3.10"',
 ]
 [project.optional-dependencies]
 pdm = [
@@ -69,7 +70,7 @@ test-cov = {cmd="pytest --junitxml=junit/test-results.xml --cov --cov-report=xml
 
 [tool.pdm.dev-dependencies]
 dev = [
-    "PyYAML>=6.0",
+    "PyYAML>=6.0.1",
     "mypy>=1.4.1",
     "ruff>=0.0.275",
     "types-PyYAML>=6.0.12.10",
@@ -78,6 +79,15 @@ dev = [
     "pytest-cov>=4.1.0",
     "pre-commit>=3.3.3",
     "tomli>=2.0.1",
+    "tox-gh>=1.3.1",
+    "tox-pdm>=0.7.2",
+    "tox>=4.14.2",
+]
+testtox = [
+    "pytest>=8.1.1",
+    "pytest-cov>=5.0.0",
+    "pytest-mock>=3.14.0",
+    "PyYAML>=6.0.1",
 ]
 
 [tool.ruff]
@@ -93,14 +103,20 @@ minversion = "7.0"
 testpaths = ["tests"]
 norecursedirs = "*.egg .eggs dist build docs .tox .git __pycache__ node_modules .venv __pypackages__"
 
+[tool.coverage.paths]
+source =[
+   "src"
+]
 [tool.coverage.run]
 branch = true
+parallel = true
 include = ["src/*"]
 omit = ["*/tests/*"]
+source = ["src", "tests"]
 
 [tool.coverage.report]
-fail_under = 92.0
-
+show_missing = true
+precision = 2
 exclude_lines = [
     "def __repr__",
     "if TYPE_CHECKING:",
diff --git a/tests/conftest.py b/tests/conftest.py
index b8a4da4..253aab6 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,3 +1,8 @@
-pytest_plugins = [
-    "pdm.pytest",
-]
+try:
+    import pdm  # noqa: F401
+except ImportError:
+    pass
+else:
+    pytest_plugins = [
+        "pdm.pytest",
+    ]
diff --git a/tests/test_pdm/test_pdm_plugin.py b/tests/test_pdm/test_pdm_plugin.py
index c93bf32..736d283 100644
--- a/tests/test_pdm/test_pdm_plugin.py
+++ b/tests/test_pdm/test_pdm_plugin.py
@@ -4,6 +4,9 @@
 from unittest import mock
 
 import pytest
+
+pdm_module = pytest.importorskip("pdm")
+# ruff: noqa: E402
 from pdm.cli.hooks import HookManager
 from pdm.core import Core
 from pdm.models.candidates import Candidate
diff --git a/tests/test_pdm/test_pdm_sync_pre_commit_hook.py b/tests/test_pdm/test_pdm_sync_pre_commit_hook.py
index 6f349a5..5d467e6 100644
--- a/tests/test_pdm/test_pdm_sync_pre_commit_hook.py
+++ b/tests/test_pdm/test_pdm_sync_pre_commit_hook.py
@@ -2,6 +2,9 @@
 from unittest.mock import MagicMock, patch
 
 import pytest
+
+pdm_module = pytest.importorskip("pdm")
+# ruff: noqa: E402
 from pdm.core import Core
 from pdm.models.candidates import Candidate
 from pdm.models.requirements import NamedRequirement
diff --git a/tests/test_poetry/test_poetry_plugin.py b/tests/test_poetry/test_poetry_plugin.py
index a78a37f..f4719a3 100644
--- a/tests/test_poetry/test_poetry_plugin.py
+++ b/tests/test_poetry/test_poetry_plugin.py
@@ -2,6 +2,9 @@
 from unittest.mock import MagicMock, patch
 
 import pytest
+
+poetry_module = pytest.importorskip("poetry")
+# ruff: noqa: E402
 from cleo.events.console_terminate_event import ConsoleTerminateEvent
 from poetry.console.application import Application
 from poetry.console.commands.install import InstallCommand
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..5ef0ed8
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,67 @@
+[tox]
+requires =
+    tox>=4.2
+env_list =
+    report
+    clean
+    py{312, 311, 310, 39}-pdm{213, 212, 211, 210, 29, 28, 27}
+    py{312, 311, 310, 39}-poetry{17, 16}
+
+[testenv]
+set_env =
+    py{39,310,311,312}-pdm{27,28,29,210,211,212,213}: COVERAGE_FILE = .coverage.{envname}
+    py{39,310,311,312}-poetry{16, 17}: COVERAGE_FILE = .coverage.{envname}
+commands =
+    pytest --cov --cov-append --cov-report=term-missing {posargs:-vv} --cov-config=pyproject.toml
+depends =
+    report: py{312, 311, 310, 39}-pdm{213, 212, 211, 210, 29, 28, 27}
+    report: py{312, 311, 310, 39}-poetry{17, 16}
+    py{312, 311, 310, 39}-pdm{213, 212, 211, 210, 29, 28, 27}: clean
+    py{312, 311, 310, 39}-poetry{17, 16}: clean
+
+[testenv:report]
+skip_install = true
+commands =
+    coverage combine
+    coverage report
+    coverage html
+    coverage xml
+groups =
+    testtox
+
+[testenv:clean]
+skip_install = true
+commands =
+    coverage erase
+groups =
+    testtox
+
+[testenv:py{39,310,311,312}-pdm{27,28,29,210,211,212,213}]
+package = editable
+deps =
+    pdm210: pdm<2.11,>=2.10
+    pdm211: pdm<2.12,>=2.11
+    pdm212: pdm<2.13,>=2.12
+    pdm213: pdm<2.14,>=2.13.2
+    pdm27: pdm<2.8,>=2.7
+    pdm28: pdm<2.9,>=2.8
+    pdm29: pdm<2.10,>=2.9
+groups =
+    testtox
+
+[testenv:py{312, 311, 310, 39}-poetry{16, 17, 18}]
+package = editable
+deps =
+    poetry16: poetry<1.7,>=1.6
+    poetry17: poetry<1.8,>=1.7
+    poetry18: poetry<1.9,>=1.8
+groups =
+    testtox
+
+[gh]
+python =
+    3.9= py39-pdm{27,28,29,210,211,212,213},py39-poetry{16, 17, 18}, report, clean
+    3.10= py310-pdm{27,28,29,210,211,212,213}, py310-poetry{16, 17, 18}, report, clean
+    3.11= py311-pdm{27,28,29,210,211,212,213}, py311-poetry{16, 17, 18}, report, clean
+    3.12= py312-pdm{27,28,29,210,211,212,213}, py312-poetry{16, 17, 18}, report, clean
+fail_on_no_env = True