diff --git a/Makefile b/Makefile
index 84d0ef86..29e4086f 100644
--- a/Makefile
+++ b/Makefile
@@ -36,7 +36,7 @@ uninstall:
 test:
 	# Unit tests with coverage report
 	coverage erase
-	coverage run -m pytest -c tests/.configs/pytest.ini
+	coverage run -m pytest
 	coverage report
 	coverage html
 
diff --git a/pyproject.toml b/pyproject.toml
index eba17764..794b36d0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -99,3 +99,17 @@ ignore = ["tests"]
 [tool.pylint.design]
 min-public-methods = 0
 max-public-methods = 30
+
+[tool.pytest.ini_options]
+testpaths = ["tests/unit/"]
+asyncio_mode = "auto"
+markers = [
+    "pydantic: Tests with Pydantic as a dependency",
+]
+filterwarnings = [
+    "ignore:Module \"dependency_injector.ext.aiohttp\" is deprecated since version 4\\.0\\.0:DeprecationWarning",
+    "ignore:Module \"dependency_injector.ext.flask\" is deprecated since version 4\\.0\\.0:DeprecationWarning",
+    "ignore:Please use \\`.*?\\` from the \\`scipy.*?\\`(.*?)namespace is deprecated\\.:DeprecationWarning",
+    "ignore:Please import \\`.*?\\` from the \\`scipy(.*?)\\` namespace(.*):DeprecationWarning",
+    "ignore:\\`scipy(.*?)\\` is deprecated(.*):DeprecationWarning",
+]
diff --git a/tests/.configs/pytest.ini b/tests/.configs/pytest.ini
deleted file mode 100644
index ea92be96..00000000
--- a/tests/.configs/pytest.ini
+++ /dev/null
@@ -1,13 +0,0 @@
-[pytest]
-testpaths = tests/unit/
-python_files = test_*_py3*.py
-asyncio_mode = auto
-markers =
-    pydantic: Tests with Pydantic as a dependency
-filterwarnings =
-    ignore:Module \"dependency_injector.ext.aiohttp\" is deprecated since version 4\.0\.0:DeprecationWarning
-    ignore:Module \"dependency_injector.ext.flask\" is deprecated since version 4\.0\.0:DeprecationWarning
-    ignore:Please use \`.*?\` from the \`scipy.*?\`(.*?)namespace is deprecated\.:DeprecationWarning
-    ignore:Please import \`.*?\` from the \`scipy(.*?)\` namespace(.*):DeprecationWarning
-    ignore:\`scipy(.*?)\` is deprecated(.*):DeprecationWarning
-    ignore:ssl\.PROTOCOL_TLS is deprecated:DeprecationWarning:botocore.*
diff --git a/tests/unit/ext/test_flask_py2_py3.py b/tests/unit/ext/test_flask_py2_py3.py
index e64de165..3e79e067 100644
--- a/tests/unit/ext/test_flask_py2_py3.py
+++ b/tests/unit/ext/test_flask_py2_py3.py
@@ -11,7 +11,7 @@ def index():
     return "Hello World!"
 
 
-def test():
+def _test():
     return "Test!"
 
 
@@ -25,7 +25,7 @@ class ApplicationContainer(containers.DeclarativeContainer):
     app = flask.Application(Flask, __name__)
 
     index_view = flask.View(index)
-    test_view = flask.View(test)
+    test_view = flask.View(_test)
     test_class_view = flask.ClassBasedView(Test)
 
 
diff --git a/tox.ini b/tox.ini
index 54f99e57..b37bfeaa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ deps=
     werkzeug
 extras=
     yaml
-commands = pytest -c tests/.configs/pytest.ini
+commands = pytest
 python_files = test_*_py3*.py
 setenv =
     COVERAGE_RCFILE = pyproject.toml
@@ -45,7 +45,7 @@ deps =
     boto3
     mypy_boto3_s3
     werkzeug
-commands = pytest -c tests/.configs/pytest.ini -m pydantic
+commands = pytest -m pydantic
 
 [testenv:coveralls]
 passenv = GITHUB_*, COVERALLS_*, DEPENDENCY_INJECTOR_*
@@ -57,7 +57,7 @@ deps=
     coveralls>=4
 commands=
     coverage erase
-    coverage run -m pytest -c tests/.configs/pytest.ini
+    coverage run -m pytest
     coverage report
     coveralls
 
@@ -74,7 +74,7 @@ deps=
     mypy_boto3_s3
 extras=
     yaml
-commands = pytest -c tests/.configs/pytest-py35.ini
+commands = pytest
 
 
 [testenv:pylint]