diff --git a/pkgs/development/python-modules/py-evm/default.nix b/pkgs/development/python-modules/py-evm/default.nix
index 9b78ea9c6180..c3aa5f9f4607 100644
--- a/pkgs/development/python-modules/py-evm/default.nix
+++ b/pkgs/development/python-modules/py-evm/default.nix
@@ -59,6 +59,11 @@ buildPythonPackage rec {
   ]
   ++ eth-hash.optional-dependencies.pycryptodome;
 
+  pytestFlags = [
+    # 'asyncio.iscoroutinefunction' is deprecated and slated for removal in Python 3.16; use inspect.iscoroutinefunction() instead
+    "-Wignore::DeprecationWarning"
+  ];
+
   disabledTests = [
     # side-effect: runs pip online check and is blocked by sandbox
     "test_install_local_wheel"