diff --git a/pkgs/development/python-modules/parsimonious/default.nix b/pkgs/development/python-modules/parsimonious/default.nix
index 5a51270e2090..b156321cefec 100644
--- a/pkgs/development/python-modules/parsimonious/default.nix
+++ b/pkgs/development/python-modules/parsimonious/default.nix
@@ -26,6 +26,14 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+  disabledTests = [
+    # test_benchmarks.py tests are actually benchmarks and may fail due to
+    # something being unexpectedly slow on a heavily loaded build machine
+    "test_lists_vs_dicts"
+    "test_call_vs_inline"
+    "test_startswith_vs_regex"
+  ];
+
   postPatch = ''
     substituteInPlace setup.py \
       --replace "regex>=2022.3.15" "regex"