diff --git a/tests/default.nix b/tests/default.nix
index 05036d6a7..bc2124e69 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -93,6 +93,7 @@ let
       "pls"
       "pyenv"
       "sagemath"
+      "sapling"
       "scmpuff"
       "sm64ex"
       "thefuck"