diff --git a/pkgs/development/python-modules/hypothesis.nix b/pkgs/development/python-modules/hypothesis.nix
index 0927c703fbfd..b9f95d1a0313 100644
--- a/pkgs/development/python-modules/hypothesis.nix
+++ b/pkgs/development/python-modules/hypothesis.nix
@@ -28,6 +28,7 @@ buildPythonPackage rec {
 
   # https://github.com/DRMacIver/hypothesis/issues/300
   checkPhase = ''
+    rm tox.ini # This file changes how py.test runs and breaks it
     py.test tests/cover
   '';