diff --git a/pkgs/development/python-modules/build/default.nix b/pkgs/development/python-modules/build/default.nix
index ba8d15909f21..f1f7f0e81bd2 100644
--- a/pkgs/development/python-modules/build/default.nix
+++ b/pkgs/development/python-modules/build/default.nix
@@ -54,6 +54,8 @@ buildPythonPackage rec {
   pytestFlagsArray = [
     "-n"
     "$NIX_BUILD_CORES"
+    "-W"
+    "ignore::DeprecationWarning"
   ];
 
   disabledTests = [