diff --git a/pyproject.toml b/pyproject.toml
index e95696ced..df518f736 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -241,8 +241,8 @@ addopts = [
     "--durations=3",
     "--ignore=docs/abbreviate_signature.py",
     "--ignore=docs/conf.py",
+    "-m not slow",
     "-rS",
-    '-m "not slow"',
 ]
 filterwarnings = [
     "error",