diff --git a/test/notebooks/notebook_test_utils.py b/test/notebooks/notebook_test_utils.py
index 820cd996..9a01a550 100644
--- a/test/notebooks/notebook_test_utils.py
+++ b/test/notebooks/notebook_test_utils.py
@@ -82,7 +82,7 @@ def cell_match(nb_cell, ins_tag: str) -> bool:
 
 
 def run_notebook(notebook_file: str, store_file: str, store_password: str,
-                 timeout: int = -1, hacks: Optional[List[Tuple[str, str]]] = None, ) -> None:
+                 timeout: int = -1, hacks: Optional[List[Tuple[str, str]]] = None) -> None:
     """
     Executes notebook with added access to the configuration store.
 
@@ -90,7 +90,7 @@ def run_notebook(notebook_file: str, store_file: str, store_password: str,
         notebook_file:  Notebook file.
         store_file:     Configuration store file.
         store_password: Configuration store password.
-        timeout:        Optional timeout in seconds.
+        timeout:        Optional timeout in seconds
         hacks:          Optional hacks to be inserted into the notebook
                         before running it.
     """