diff --git a/pytest.ini b/pytest.ini
deleted file mode 100644
index f818888e98690a861228b1f3c0214b1cc94fb6e1..0000000000000000000000000000000000000000
--- a/pytest.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[pytest]
-testpaths=unittests
diff --git a/tox.ini b/tox.ini
index 101904b7de43fba6f04cf65641f555d79b0b080a..1be547ece35b39fb5bfd219887fa961dfa92a35c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist=py38, py39, py310
+envlist = py38, py39, py310
 skip_missing_interpreters = true
 
 [testenv]
@@ -9,7 +9,12 @@ deps = .
     # TODO: Make this f-branch sensitive
     git+https://gitlab.indiscale.com/caosdb/src/caosdb-pylib.git@dev
     git+https://gitlab.indiscale.com/caosdb/src/caosdb-advanced-user-tools.git@dev
-commands= caosdb-crawler --help
+commands = caosdb-crawler --help
     py.test --cov=caosdb -vv {posargs}
+
 [flake8]
-max-line-length=100
+max-line-length = 100
+
+[pytest]
+testpaths = unittests
+xfail_strict = True
\ No newline at end of file