diff --git a/pkgs/development/python-modules/pyls-isort/default.nix b/pkgs/development/python-modules/pyls-isort/default.nix
index 35b43969e529..3c0febd9ecf8 100644
--- a/pkgs/development/python-modules/pyls-isort/default.nix
+++ b/pkgs/development/python-modules/pyls-isort/default.nix
@@ -16,6 +16,8 @@ buildPythonPackage rec {
   # no tests
   doCheck = false;
 
+  pythonImportsCheck = [ "pyls_isort" ];
+
   propagatedBuildInputs = [
     isort python-language-server
   ];