diff --git a/pkgs/development/python-modules/pymatgen/default.nix b/pkgs/development/python-modules/pymatgen/default.nix
index adb87f41b992..3d737f1e0af8 100644
--- a/pkgs/development/python-modules/pymatgen/default.nix
+++ b/pkgs/development/python-modules/pymatgen/default.nix
@@ -152,6 +152,7 @@ buildPythonPackage rec {
     ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Fatal Python error: Aborted
       # matplotlib/backend_bases.py", line 2654 in create_with_canvas
+      # https://github.com/materialsproject/pymatgen/issues/4452
       "test_angle"
       "test_as_dict_from_dict"
       "test_attributes"
@@ -176,6 +177,10 @@ buildPythonPackage rec {
     # Crash when running the pmg command
     # Critical error: required built-in appearance SystemAppearance not found
     "tests/cli/test_pmg_plot.py"
+
+    # attempt to insert nil object from objects[1]
+    # https://github.com/materialsproject/pymatgen/issues/4452
+    "tests/io/abinit/test_abitimer.py"
   ];
 
   meta = {