diff --git a/pyproject.toml b/pyproject.toml
index e4ecb439d2..7e42aa1a97 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,16 +70,37 @@ casd-dev = [
     "scipy >=1.10.1, <2.0",  # Only used to test de_net_a_brut reform
 ]
 
+
+# ; E128/133: We prefer hang-closing visual indents
+# ; E251:     We prefer `function(x = 1)` over `function(x=1)`
+# ; E501:     We do not enforce a maximum line length
+# ; F403/405: We ignore * imports
+# ; W503/504: We break lines before binary operators (Knuth's style)
+
+[tool.flake8]
+hang-closing = true
+ignore       = ["E128","E251","F403","F405","E501","W503", ]
+docstring-quotes = "single"
+inline-quotes = "single"
+multiline-quotes = "single"
+
+[tool.pep8]
+hang-closing = true
+ignore       = ["E128","E251","F403","F405","E501","W503"]
+in-place     = true
+
 [tool.pytest.ini_options]
-addopts = "--showlocals --doctest-modules"
-testpaths = [ "openfisca_country_template/tests" ]
+addopts      = "--showlocals --exitfirst --doctest-modules --disable-pytest-warnings"
+testpaths    = "tests"
 python_files = "**/*.py"
 filterwarnings = [
     "error",
     "ignore::UserWarning",
-    'ignore:function ham\(\) is deprecated:DeprecationWarning'
+    'ignore:function ham\(\) is deprecated:DeprecationWarning',
+    "ignore:invalid value encountered in divide:RuntimeWarning",
 ]
 
+
 [tool.pylint.messages_control]
 disable = [
     "invalid-name",
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index ffef11b93b..0000000000
--- a/setup.cfg
+++ /dev/null
@@ -1,22 +0,0 @@
-; E128/133: We prefer hang-closing visual indents
-; E251:     We prefer `function(x = 1)` over `function(x=1)`
-; E501:     We do not enforce a maximum line length
-; F403/405: We ignore * imports
-; W503/504: We break lines before binary operators (Knuth's style)
-
-[flake8]
-hang-closing = true
-ignore       = E128,E251,F403,F405,E501,W503
-docstring-quotes = single
-inline-quotes = single
-multiline-quotes = single
-
-[pep8]
-hang-closing = true
-ignore       = E128,E251,F403,F405,E501,W503
-in-place     = true
-
-[tool:pytest]
-addopts      = --showlocals --exitfirst --doctest-modules --disable-pytest-warnings
-testpaths    = tests
-python_files = **/*.py