diff --git a/nixos/lib/test-driver/pyproject.toml b/nixos/lib/test-driver/pyproject.toml
index 8638f14dfdae..17b7130a4bad 100644
--- a/nixos/lib/test-driver/pyproject.toml
+++ b/nixos/lib/test-driver/pyproject.toml
@@ -37,7 +37,6 @@ target-version = ['py39']
 include = '\.pyi?$'
 
 [tool.mypy]
-python_version = "3.10"
 warn_redundant_casts = true
 disallow_untyped_calls = true
 disallow_untyped_defs = true