From 9da0c51027b3d09a607044fe0fd3dce2a9044e2e Mon Sep 17 00:00:00 2001
From: snicket2100 <57048005+snicket2100@users.noreply.github.com>
Date: Fri, 11 Dec 2020 21:19:35 +0100
Subject: [PATCH] parsimonious: excluding unpredictable tests

---
 pkgs/development/python-modules/parsimonious/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/python-modules/parsimonious/default.nix b/pkgs/development/python-modules/parsimonious/default.nix
index 69e6d1d2bb2c..25d87a7f2f1f 100644
--- a/pkgs/development/python-modules/parsimonious/default.nix
+++ b/pkgs/development/python-modules/parsimonious/default.nix
@@ -17,6 +17,9 @@ buildPythonPackage rec {
   checkInputs = [ nose ];
   propagatedBuildInputs = [ six ];
 
+  # performance tests tend to fail sometimes
+  NOSE_EXCLUDE = "test_benchmarks";
+
   meta = with stdenv.lib; {
     homepage = "https://github.com/erikrose/parsimonious";
     description = "Fast arbitrary-lookahead parser written in pure Python";