diff --git a/pkgs/development/python-modules/fastapi-mcp/default.nix b/pkgs/development/python-modules/fastapi-mcp/default.nix
index 844ba0f6de2d..bc9c51e8f0d3 100644
--- a/pkgs/development/python-modules/fastapi-mcp/default.nix
+++ b/pkgs/development/python-modules/fastapi-mcp/default.nix
@@ -20,7 +20,7 @@
 
   # tests
   coverage,
-  pytest-asyncio,
+  pytest-asyncio_0,
   pytest-cov-stub,
   pytestCheckHook,
 }:
@@ -59,7 +59,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [
     coverage
-    pytest-asyncio
+    pytest-asyncio_0
     pytest-cov-stub
     pytestCheckHook
   ];