diff --git a/tests/test_notebook.py b/tests/test_notebook.py
index 006e98d..2e18a91 100644
--- a/tests/test_notebook.py
+++ b/tests/test_notebook.py
@@ -22,7 +22,7 @@ def _notebook_run(path):
     with tempfile.NamedTemporaryFile(suffix=".ipynb") as fout:
         args = ["jupyter", "nbconvert", "--to", "notebook", "--execute",
                 "--ExecutePreprocessor.timeout=60",
-                "--kernel_name", kernel_name,
+                "--ExecutePreprocessor.kernel_name=%s"%(kernel_name),
                 "--log-level=WARN",
                 "--output", fout.name, path]
         subprocess.check_call(args)