diff --git a/tests/mkdocs-material/default.nix b/tests/mkdocs-material/default.nix
index bcdc590ca..5779beab2 100644
--- a/tests/mkdocs-material/default.nix
+++ b/tests/mkdocs-material/default.nix
@@ -1,7 +1,7 @@
-{ poetry2nix, python3 }:
+{ poetry2nix, python311 }:
 let
   env = poetry2nix.mkPoetryEnv {
-    python = python3;
+    python = python311;
     pyproject = ./pyproject.toml;
     poetrylock = ./poetry.lock;
   };