diff --git a/pkgs/development/python-modules/jupyterlab_server/default.nix b/pkgs/development/python-modules/jupyterlab_server/default.nix
index f3f2b9dc32c1..2c60d7b3b273 100644
--- a/pkgs/development/python-modules/jupyterlab_server/default.nix
+++ b/pkgs/development/python-modules/jupyterlab_server/default.nix
@@ -10,7 +10,6 @@
 , jupyter_server
 , openapi-core
 , pytest-tornasync
-, pytest-cov
 , ruamel-yaml
 , strict-rfc3339
 }: