diff --git a/pkgs/development/python-modules/chatlas/default.nix b/pkgs/development/python-modules/chatlas/default.nix
index 602b45e4a467..423c8f6d9891 100644
--- a/pkgs/development/python-modules/chatlas/default.nix
+++ b/pkgs/development/python-modules/chatlas/default.nix
@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   buildPythonPackage,
   fetchFromGitHub,
 
@@ -155,6 +156,11 @@ buildPythonPackage rec {
     "test_tool_yielding_with_error"
     "test_translate_model_params_openai"
     "test_unknown_tool_error_format_updated"
+  ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
+    # Fails in the sandbox
+    # RuntimeError: *** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[1]
+    "test_can_create_image_from_plot"
   ];
 
   meta = {