diff --git a/pyproject.toml b/pyproject.toml
index babe11a..b4bdb68 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -91,8 +91,13 @@
     # "D",
     "RET",
     "SIM",
+    "ANN",
   ]
   ignore = [
     "D1",   # Missing docstrings
+    "ANN101",  # Annotation for 'self'
   ]
   line-length = 99
+
+[tool.ruff.per-file-ignores]
+  "tests/**/*.py" = ["ANN"] # TODO: tests are missing type annotations