diff --git a/nb-tests/test_notebooks.py b/nb-tests/test_notebooks.py
index ee747fff..2f3e6834 100644
--- a/nb-tests/test_notebooks.py
+++ b/nb-tests/test_notebooks.py
@@ -3,7 +3,6 @@
 from dataclasses import dataclass
 import ee
 import papermill
-from papermill.execute import PapermillExecutionError
 import pytest
 
 try:
@@ -25,9 +24,12 @@
     "Seasonal Calculation.ipynb": "buffer source array is read-only",
     "Tracking Data Gantt Chart.ipynb": "not a zip file",
 }
+
+
 class UnexecptedNotebookExecutionError(Exception):
     pass
 
+
 @dataclass
 class Notebook:
     path: pathlib.Path
@@ -38,12 +40,13 @@ class Notebook:
 ALL_NOTEBOOKS = [
     Notebook(
         path=p,
-        raises=False if not p.name in KNOWN_ERRORS_REGEXES else True,
+        raises=False if p.name not in KNOWN_ERRORS_REGEXES else True,
         raises_match=KNOWN_ERRORS_REGEXES.get(p.name),
     )
     for p in NB_DIR.rglob("*.ipynb")
 ]
 
+
 @pytest.mark.parametrize(
     "notebook",
     ALL_NOTEBOOKS,
@@ -59,4 +62,4 @@ def test_notebooks(notebook: Notebook):
             raise UnexecptedNotebookExecutionError(
                 f"{notebook.path.name=} not in {list(KNOWN_ERRORS_REGEXES)= } but execution errored. "
                 "This notebook is unexpectedly broken."
-            ) from e
\ No newline at end of file
+            ) from e