diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index a1e51d9d88..b9d333f152 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -13,7 +13,6 @@ repos:
     rev: "v0.6.3"
     hooks:
       - id: ruff
-        exclude: tests/testdata
         args: ["--fix"]
   - repo: https://github.com/Pierre-Sassoulas/copyright_notice_precommit
     rev: 0.1.2
diff --git a/pyproject.toml b/pyproject.toml
index b3243a36b3..db65a76d97 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -98,6 +98,8 @@ ignore_missing_imports = true
 [tool.ruff]
 target-version = "py39"
 
+exclude = ["tests/testdata/"]
+
 # ruff is less lenient than pylint and does not make any exceptions
 # (for docstrings, strings and comments in particular).
 line-length = 110