diff --git a/chatmaild/pyproject.toml b/chatmaild/pyproject.toml
index e464581e..dd6bb11b 100644
--- a/chatmaild/pyproject.toml
+++ b/chatmaild/pyproject.toml
@@ -73,5 +73,6 @@ commands =
 deps = pytest 
        pdbpp 
        pytest-localserver
+       execnet
 commands = pytest -v -rsXx {posargs}
 """