[tox] Extend the black check to the relevant parts in tests

Also apply the formatting.

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index aa9cf5ab9..acceea048 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ deps =
     black==19.10b0
     isort==4.3.21
 commands =
-    black --check pylint setup.py
+    black --check . --exclude="tests/functional/|tests/input|tests/extensions/data|tests/regrtest_data/|tests/data/|venv|astroid|.tox"
     isort -rc pylint/ setup.py --check-only
 changedir = {toxinidir}