diff --git a/.flake8 b/.flake8
deleted file mode 100644
index 02b0915..0000000
--- a/.flake8
+++ /dev/null
@@ -1,28 +0,0 @@
-[flake8]
-# References:
-#   https://flake8.readthedocs.io/en/latest/user/configuration.html
-#   https://flake8.readthedocs.io/en/latest/user/error-codes.html
-#   https://pycodestyle.readthedocs.io/en/latest/intro.html#error-codes
-
-ignore =
-    # E203: whitespace before ':'
-    E203,
-    # E226: missing whitespace around arithmetic operator
-    E226,
-    # E231: missing whitespace after ',', ';', or ':'
-    E231,
-    # E402: module level imports on one line
-    E402,
-    # E501: line too long
-    E501,
-    # W503: line break before binary operator
-    W503,
-    # W504: line break after binary operator
-    W504,
-exclude =
-    #
-    # ignore the following directories
-    #
-    .eggs,
-    build,
-    sphinxext,
diff --git a/pyproject.toml b/pyproject.toml
index d7a4509..fbbc026 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,6 +53,13 @@ requires = ["setuptools>=45"]
 # Defined by PEP 517
 build-backend = "setuptools.build_meta"
 
+[tool.setuptools.package-data]
+mypkg = [
+    "etc/test_data/*.txt",
+    "tests/results/*.npz",
+    "tests/results/imagerepo.json"
+]
+
 [tool.pytest.ini_options]
 minversion = "6.0"
 addopts = ["-ra", "--showlocals", "--strict-markers", "--strict-config"]
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 0df43f3..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,26 +0,0 @@
-[flake8]
-exclude =
-    .git,
-    docs,
-    tephi/tests/__init__.py
-    .eggs
-
-[tool:pytest]
-testpaths =
-    tephi/
-markers =
-    graphical: mark a test as a graphical test
-addopts =
-    -ra
-    -v
-    --cov-config=.coveragerc
-    --cov=tephi
-    --cov-report=term-missing
-    --doctest-modules
-doctest_optionflags = NORMALIZE_WHITESPACE ELLIPSIS NUMBER
-
-[options.package_data]
-tephi =
-  etc/test_data/*.txt
-  tests/results/*.npz
-  tests/results/imagerepo.json
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 093148b..0000000
--- a/setup.py
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/usr/bin/env python
-"""A file to be used for installing or building the package."""
-# Copyright Tephi contributors
-#
-# This file is part of Tephi and is released under the BSD license.
-# See LICENSE in the root of the repository for full licensing details.
-
-from setuptools import setup
-
-if __name__ == "__main__":
-    setup()