diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 68c5c5bf3..000000000
--- a/tox.ini
+++ /dev/null
@@ -1,68 +0,0 @@
-[tox]
-envlist = test, combine_coverage, coverage_artifact, lint, docs, pre-commit # By default, use current python for pytest and linting
-passenv = TOXENV CI GITLAB_* CODECOV_* TAP_* TARGET_* SAMPLE_*
-skipsdist=True
-isolated_build = true
-
-[build-system]
-requires = ["poetry_core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
-
-[testenv]
-passenv = TOXENV CI GITLAB_* CODECOV_* TAP_* TARGET_* SAMPLE_*
-whitelist_externals = poetry
-commands_pre =
-    poetry install --no-root
-commands =
-    poetry run coverage run --parallel -m pytest -x -v {posargs}
-
-[testenv:test]
-# Use default py interpreter
-
-[testenv:doctest]
-commands =
-    poetry run pytest --doctest-modules {posargs:singer_sdk}
-
-[testenv:htmlcov]
-# Launch local web browser with previously-captured pytest coverage results
-whitelist_externals =
-    echo
-    poetry
-    open
-commands_pre =
-    echo "Skipping install..."
-commands =
-    poetry run coverage html
-    open ./htmlcov/index.html
-
-[testenv:mypy]
-commands =
-    poetry run mypy singer_sdk --exclude='tests'
-
-[testenv:lint]
-commands =
-    poetry run black --check --diff singer_sdk/ tests/ samples/
-    poetry run isort --check singer_sdk tests samples
-    poetry run flake8 singer_sdk tests samples
-
-[testenv:pre-commit]
-whitelist_externals = pre-commit
-commands_pre =
-    pre-commit install
-commands =
-    pre-commit run --all
-
-[testenv:docs]
-commands_pre =
-    poetry install --no-root -E docs
-commands =
-    poetry run sphinx-build docs build -W
-
-[testenv:combine_coverage]
-commands =
-    poetry run coverage combine
-    poetry run coverage report --show-missing
-
-[testenv:coverage_artifact]
-commands =
-    poetry run coverage {posargs:xml}