diff --git a/pkgs/development/python-modules/mitmproxy/default.nix b/pkgs/development/python-modules/mitmproxy/default.nix
index f3b24ffabff2..055cb8aee99a 100644
--- a/pkgs/development/python-modules/mitmproxy/default.nix
+++ b/pkgs/development/python-modules/mitmproxy/default.nix
@@ -111,6 +111,7 @@ buildPythonPackage rec {
     # Tests require terminal
     "test_integration"
   ];
+  dontUsePytestXdist = true;
 
   pythonImportsCheck = [ "mitmproxy" ];