diff --git a/pkgs/development/python-modules/pytest-flake8/default.nix b/pkgs/development/python-modules/pytest-flake8/default.nix
index 93883283627..b39737ea701 100644
--- a/pkgs/development/python-modules/pytest-flake8/default.nix
+++ b/pkgs/development/python-modules/pytest-flake8/default.nix
@@ -1,4 +1,4 @@
-{lib, buildPythonPackage, fetchPypi, pytest, flake8}:
+{lib, buildPythonPackage, fetchPypi, fetchpatch, pytest, flake8}:
 
 buildPythonPackage rec {
   name = "${pname}-${version}";
@@ -16,6 +16,16 @@ buildPythonPackage rec {
     sha256 = "1za5i09gz127yraigmcl443w6149714l279rmlfxg1bl2kdsc45a";
   };
 
+  patches = [
+    # Fix pytest strict mode (pull request #24)
+    # https://github.com/tholo/pytest-flake8/pull/24
+    (fetchpatch {
+      name = "fix-compatibility-with-pytest-strict-mode.patch";
+      url = "https://github.com/tholo/pytest-flake8/commit/434e1b07b4b77bfe1ddb9b2b54470c6c3815bb1a.patch";
+      sha256 = "0idwgkwwysx2cibnykd81yxrgqzkpf42j99jmpnanqzi99qnc3wx";
+    })
+  ];
+
   checkPhase = ''
     pytest --ignore=nix_run_setup.py .
   '';