diff --git a/pkgs/development/python-modules/pytest-cid/default.nix b/pkgs/development/python-modules/pytest-cid/default.nix
index c1c918c4d60c..767d300f7dd9 100644
--- a/pkgs/development/python-modules/pytest-cid/default.nix
+++ b/pkgs/development/python-modules/pytest-cid/default.nix
@@ -20,6 +20,11 @@ buildPythonPackage rec {
     sha256 = "sha256-H2RtMGYWukowTTfqZSx+hikxzkqw1v5bA4AfZfiVl8U=";
   };
 
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace "pytest >= 5.0, < 7.0" "pytest >= 5.0"
+  '';
+
   propagatedBuildInputs = [
     py-cid
   ];