diff --git a/setup.cfg b/setup.cfg
index cb199d257..bd52e0cec 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -55,6 +55,7 @@ strict_optional = False
 
 [tool:pytest]
 filterwarnings =
+    all
     ignore::DeprecationWarning:docutils.io
 
 [coverage:run]
diff --git a/tox.ini b/tox.ini
index 6715fd338..64668d1b8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,7 +24,7 @@ setenv =
     PYTHONWARNINGS = all,ignore::ImportWarning:pkgutil,ignore::ImportWarning:importlib._bootstrap,ignore::ImportWarning:importlib._bootstrap_external,ignore::ImportWarning:pytest_cov.plugin,ignore::DeprecationWarning:site,ignore::DeprecationWarning:_pytest.assertion.rewrite,ignore::DeprecationWarning:_pytest.fixtures,ignore::DeprecationWarning:distutils
     SPHINX_TEST_TEMPDIR = {envdir}/testbuild
 commands=
-    pytest -Wall --durations 25 {posargs}
+    pytest --durations 25 {posargs}
 
 [testenv:flake8]
 basepython = python3