diff --git a/.github/workflows/python-ci.yml b/.github/workflows/python-ci.yml
index 26e074c..cc8a9e6 100644
--- a/.github/workflows/python-ci.yml
+++ b/.github/workflows/python-ci.yml
@@ -33,11 +33,14 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
 
-      - name: Install tox
-        run: pip install tox
+      - name: Install package
+        run: poetry install -v
 
       - name: Run tests
-        run: tox
+        run: |
+          poetry run coverage run --source octue -m unittest discover
+          poetry run coverage report --show-missing
+          poetry run coverage xml
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4
diff --git a/poetry.lock b/poetry.lock
index de3cdbe..285b13f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -53,17 +53,6 @@ typed-ast = ">=1.4.0"
 [package.extras]
 d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
-[[package]]
-name = "cachetools"
-version = "5.5.0"
-description = "Extensible memoizing collections and decorators"
-optional = false
-python-versions = ">=3.7"
-files = [
-    {file = "cachetools-5.5.0-py3-none-any.whl", hash = "sha256:02134e8439cdc2ffb62023ce1debca2944c3f289d66bb17ead3ab3dede74b292"},
-    {file = "cachetools-5.5.0.tar.gz", hash = "sha256:2cc24fb4cbe39633fb7badd9db9ca6295d766d9c2995f245725a46715d050f2a"},
-]
-
 [[package]]
 name = "cfgv"
 version = "3.4.0"
@@ -75,17 +64,6 @@ files = [
     {file = "cfgv-3.4.0.tar.gz", hash = "sha256:e52591d4c5f5dead8e0f673fb16db7949d2cfb3f7da4582893288f0ded8fe560"},
 ]
 
-[[package]]
-name = "chardet"
-version = "5.2.0"
-description = "Universal encoding detector for Python 3"
-optional = false
-python-versions = ">=3.7"
-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 = "click"
 version = "8.1.7"
@@ -371,17 +349,6 @@ files = [
     {file = "numpy-1.24.4.tar.gz", hash = "sha256:80f5e3a4e498641401868df4208b74581206afbee7cf7b8329daae82676d9463"},
 ]
 
-[[package]]
-name = "packaging"
-version = "24.1"
-description = "Core utilities for Python packages"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "packaging-24.1-py3-none-any.whl", hash = "sha256:5b8f2217dbdbd2f7f384c41c628544e6d52f2d0f53c6d0c3ea61aa5d1d7ff124"},
-    {file = "packaging-24.1.tar.gz", hash = "sha256:026ed72c8ed3fcce5bf8950572258698927fd1dbda10a5e981cdf0ac37f4f002"},
-]
-
 [[package]]
 name = "pathspec"
 version = "0.12.1"
@@ -420,21 +387,6 @@ docs = ["furo (>=2024.8.6)", "proselint (>=0.14)", "sphinx (>=8.0.2)", "sphinx-a
 test = ["appdirs (==1.4.4)", "covdefaults (>=2.3)", "pytest (>=8.3.2)", "pytest-cov (>=5)", "pytest-mock (>=3.14)"]
 type = ["mypy (>=1.11.2)"]
 
-[[package]]
-name = "pluggy"
-version = "1.5.0"
-description = "plugin and hook calling mechanisms for python"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "pluggy-1.5.0-py3-none-any.whl", hash = "sha256:44e1ad92c8ca002de6377e165f3e0f1be63266ab4d554740532335b9d75ea669"},
-    {file = "pluggy-1.5.0.tar.gz", hash = "sha256:2cffa88e94fdc978c4c574f15f9e59b7f4201d439195c3715ca9e2486f1d0cf1"},
-]
-
-[package.extras]
-dev = ["pre-commit", "tox"]
-testing = ["pytest", "pytest-benchmark"]
-
 [[package]]
 name = "pre-commit"
 version = "3.5.0"
@@ -475,25 +427,6 @@ files = [
     {file = "pyflakes-2.2.0.tar.gz", hash = "sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8"},
 ]
 
-[[package]]
-name = "pyproject-api"
-version = "1.8.0"
-description = "API to interact with the python pyproject.toml based projects"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "pyproject_api-1.8.0-py3-none-any.whl", hash = "sha256:3d7d347a047afe796fd5d1885b1e391ba29be7169bd2f102fcd378f04273d228"},
-    {file = "pyproject_api-1.8.0.tar.gz", hash = "sha256:77b8049f2feb5d33eefcc21b57f1e279636277a8ac8ad6b5871037b243778496"},
-]
-
-[package.dependencies]
-packaging = ">=24.1"
-tomli = {version = ">=2.0.1", markers = "python_version < \"3.11\""}
-
-[package.extras]
-docs = ["furo (>=2024.8.6)", "sphinx-autodoc-typehints (>=2.4.1)"]
-testing = ["covdefaults (>=2.3)", "pytest (>=8.3.3)", "pytest-cov (>=5)", "pytest-mock (>=3.14)", "setuptools (>=75.1)"]
-
 [[package]]
 name = "python-dotenv"
 version = "1.0.1"
@@ -838,45 +771,6 @@ files = [
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
 ]
 
-[[package]]
-name = "tomli"
-version = "2.0.2"
-description = "A lil' TOML parser"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "tomli-2.0.2-py3-none-any.whl", hash = "sha256:2ebe24485c53d303f690b0ec092806a085f07af5a5aa1464f3931eec36caaa38"},
-    {file = "tomli-2.0.2.tar.gz", hash = "sha256:d46d457a85337051c36524bc5349dd91b1877838e2979ac5ced3e710ed8a60ed"},
-]
-
-[[package]]
-name = "tox"
-version = "4.21.2"
-description = "tox is a generic virtualenv management and test command line tool"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "tox-4.21.2-py3-none-any.whl", hash = "sha256:13d996adcd792e7c82994b0e116d85efd84f0c6d185254d83d156f73f86b2038"},
-    {file = "tox-4.21.2.tar.gz", hash = "sha256:49381ff102296753e378fa5ff30e42a35e695f149b4dbf8a2c49d15fdb5797b2"},
-]
-
-[package.dependencies]
-cachetools = ">=5.5"
-chardet = ">=5.2"
-colorama = ">=0.4.6"
-filelock = ">=3.16.1"
-packaging = ">=24.1"
-platformdirs = ">=4.3.6"
-pluggy = ">=1.5"
-pyproject-api = ">=1.8"
-tomli = {version = ">=2.0.1", markers = "python_version < \"3.11\""}
-typing-extensions = {version = ">=4.12.2", markers = "python_version < \"3.11\""}
-virtualenv = ">=20.26.6"
-
-[package.extras]
-docs = ["furo (>=2024.8.6)", "sphinx (>=8.0.2)", "sphinx-argparse-cli (>=1.18.2)", "sphinx-autodoc-typehints (>=2.4.4)", "sphinx-copybutton (>=0.5.2)", "sphinx-inline-tabs (>=2023.4.21)", "sphinxcontrib-towncrier (>=0.2.1a0)", "towncrier (>=24.8)"]
-testing = ["build[virtualenv] (>=1.2.2)", "covdefaults (>=2.3)", "detect-test-pollution (>=1.2)", "devpi-process (>=1.0.2)", "diff-cover (>=9.2)", "distlib (>=0.3.8)", "flaky (>=3.8.1)", "hatch-vcs (>=0.4)", "hatchling (>=1.25)", "psutil (>=6)", "pytest (>=8.3.3)", "pytest-cov (>=5)", "pytest-mock (>=3.14)", "pytest-xdist (>=3.6.1)", "re-assert (>=1.1)", "setuptools (>=75.1)", "time-machine (>=2.15)", "wheel (>=0.44)"]
-
 [[package]]
 name = "typed-ast"
 version = "1.5.5"
@@ -927,17 +821,6 @@ files = [
     {file = "typed_ast-1.5.5.tar.gz", hash = "sha256:94282f7a354f36ef5dbce0ef3467ebf6a258e370ab33d5b40c249fa996e590dd"},
 ]
 
-[[package]]
-name = "typing-extensions"
-version = "4.12.2"
-description = "Backported and Experimental Type Hints for Python 3.8+"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "typing_extensions-4.12.2-py3-none-any.whl", hash = "sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d"},
-    {file = "typing_extensions-4.12.2.tar.gz", hash = "sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8"},
-]
-
 [[package]]
 name = "virtualenv"
 version = "20.26.6"
@@ -980,4 +863,4 @@ type = ["pytest-mypy"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "c368b380430069289eb97425f8f524dee35546a467d939f054ba69326909ac76"
+content-hash = "63a41dc4b5ba505280fc7535047f493179bec549b6b4998fc2f5421acf5457bb"
diff --git a/pyproject.toml b/pyproject.toml
index eb0cdd5..83259e6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,6 @@ jsonschema = "^4"
 python-dotenv = ">=0,<=2"
 
 [tool.poetry.group.dev.dependencies]
-tox = ">=3"
 flake8 = "3.8.3"
 black = "19.10.b0"
 pre-commit = ">=2.6.0"
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 22303b3..0000000
--- a/tox.ini
+++ /dev/null
@@ -1,13 +0,0 @@
-[tox]
-isolated_build = true
-envlist = {py38,py39}
-
-[testenv]
-allowlist_externals = poetry
-setenv =
-    PYTHONPATH = {toxinidir}:{toxinidir}/twined
-commands =
-    poetry install -v
-    poetry run coverage run --source octue -m unittest discover
-    poetry run coverage report --show-missing
-    poetry run coverage xml