diff --git a/pkgs/development/python-modules/pytest-trio/default.nix b/pkgs/development/python-modules/pytest-trio/default.nix
index 243ea9781f3e..291b10f9b1b8 100644
--- a/pkgs/development/python-modules/pytest-trio/default.nix
+++ b/pkgs/development/python-modules/pytest-trio/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, fetchFromGitHub, pythonOlder
-, trio, async-generator, hypothesis, outcome, pytest }:
+, trio, hypothesis, outcome, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-trio";
@@ -18,7 +18,6 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     trio
-    async-generator
     outcome
   ];