diff --git a/pkgs/development/python-modules/pyreqwest-impersonate/default.nix b/pkgs/development/python-modules/pyreqwest-impersonate/default.nix
index 465615b99ed8..1dc215bf0ee8 100644
--- a/pkgs/development/python-modules/pyreqwest-impersonate/default.nix
+++ b/pkgs/development/python-modules/pyreqwest-impersonate/default.nix
@@ -51,7 +51,7 @@ buildPythonPackage rec {
 
   env.BORING_BSSL_PATH = boringssl-wrapper;
 
-  optional-dependencies = {
+  passthru.optional-dependencies = {
     dev = [ pytest ];
   };