diff --git a/tests/R_mimetype_check.py b/tests/R_mimetype_check.py
index cc09d134..4cfe7267 100644
--- a/tests/R_mimetype_check.py
+++ b/tests/R_mimetype_check.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 
 from tests.conftest import TrackedContainer
diff --git a/tests/all-spark-notebook/test_spark_notebooks.py b/tests/all-spark-notebook/test_spark_notebooks.py
index 37aa2edb..b49b1cb2 100644
--- a/tests/all-spark-notebook/test_spark_notebooks.py
+++ b/tests/all-spark-notebook/test_spark_notebooks.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 from pathlib import Path
 
diff --git a/tests/base-notebook/test_healthcheck.py b/tests/base-notebook/test_healthcheck.py
index ac61e974..3c779803 100644
--- a/tests/base-notebook/test_healthcheck.py
+++ b/tests/base-notebook/test_healthcheck.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 import time
 from typing import Optional
diff --git a/tests/base-notebook/test_notebook.py b/tests/base-notebook/test_notebook.py
index c8288997..29c2bec7 100644
--- a/tests/base-notebook/test_notebook.py
+++ b/tests/base-notebook/test_notebook.py
@@ -1,7 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
-
 import requests
 
 from tests.conftest import TrackedContainer, find_free_port
diff --git a/tests/base-notebook/test_npm_package_manager.py b/tests/base-notebook/test_npm_package_manager.py
index 8bcba8c3..14f50957 100644
--- a/tests/base-notebook/test_npm_package_manager.py
+++ b/tests/base-notebook/test_npm_package_manager.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 from tests.conftest import TrackedContainer
 from tests.run_command import run_command
 
diff --git a/tests/base-notebook/test_pandoc.py b/tests/base-notebook/test_pandoc.py
index fa4fac9c..f5cce325 100644
--- a/tests/base-notebook/test_pandoc.py
+++ b/tests/base-notebook/test_pandoc.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 
 from tests.conftest import TrackedContainer
diff --git a/tests/base-notebook/test_start_container.py b/tests/base-notebook/test_start_container.py
index b3d69610..14418288 100644
--- a/tests/base-notebook/test_start_container.py
+++ b/tests/base-notebook/test_start_container.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 import time
 from typing import Optional
diff --git a/tests/datascience-notebook/test_mimetypes.py b/tests/datascience-notebook/test_mimetypes.py
index a2ac55cf..4fd86473 100644
--- a/tests/datascience-notebook/test_mimetypes.py
+++ b/tests/datascience-notebook/test_mimetypes.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 from tests.conftest import TrackedContainer
 from tests.R_mimetype_check import check_r_mimetypes
 
diff --git a/tests/docker-stacks-foundation/test_outdated.py b/tests/docker-stacks-foundation/test_outdated.py
index 72f6b3d0..6de18d3d 100644
--- a/tests/docker-stacks-foundation/test_outdated.py
+++ b/tests/docker-stacks-foundation/test_outdated.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 
 import pytest  # type: ignore
diff --git a/tests/docker-stacks-foundation/test_units.py b/tests/docker-stacks-foundation/test_units.py
index e709fc0c..85d07862 100644
--- a/tests/docker-stacks-foundation/test_units.py
+++ b/tests/docker-stacks-foundation/test_units.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 
 from tests.conftest import TrackedContainer
diff --git a/tests/minimal-notebook/test_nbconvert.py b/tests/minimal-notebook/test_nbconvert.py
index dabeba4d..33954cb0 100644
--- a/tests/minimal-notebook/test_nbconvert.py
+++ b/tests/minimal-notebook/test_nbconvert.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 from pathlib import Path
 
diff --git a/tests/pyspark-notebook/units/unit_pandas_version.py b/tests/pyspark-notebook/units/unit_pandas_version.py
index 5f650a3b..1728effa 100644
--- a/tests/pyspark-notebook/units/unit_pandas_version.py
+++ b/tests/pyspark-notebook/units/unit_pandas_version.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import pandas
 
 assert pandas.__version__ == "1.5.3"
diff --git a/tests/pyspark-notebook/units/unit_spark.py b/tests/pyspark-notebook/units/unit_spark.py
index 80b47d43..b6413fa4 100644
--- a/tests/pyspark-notebook/units/unit_spark.py
+++ b/tests/pyspark-notebook/units/unit_spark.py
@@ -1,4 +1,3 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import pyspark  # noqa: F401
diff --git a/tests/r-notebook/test_R_mimetypes.py b/tests/r-notebook/test_R_mimetypes.py
index a2ac55cf..4fd86473 100644
--- a/tests/r-notebook/test_R_mimetypes.py
+++ b/tests/r-notebook/test_R_mimetypes.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 from tests.conftest import TrackedContainer
 from tests.R_mimetype_check import check_r_mimetypes
 
diff --git a/tests/scipy-notebook/test_cython.py b/tests/scipy-notebook/test_cython.py
index bf1c0ab5..839d83a1 100644
--- a/tests/scipy-notebook/test_cython.py
+++ b/tests/scipy-notebook/test_cython.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 from pathlib import Path
 
 from tests.conftest import TrackedContainer
diff --git a/tests/scipy-notebook/test_matplotlib.py b/tests/scipy-notebook/test_matplotlib.py
index b8807f8f..27c6d3c3 100644
--- a/tests/scipy-notebook/test_matplotlib.py
+++ b/tests/scipy-notebook/test_matplotlib.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import logging
 from pathlib import Path
 
diff --git a/tests/scipy-notebook/units/unit_pandas.py b/tests/scipy-notebook/units/unit_pandas.py
index fc998225..2190a0b5 100644
--- a/tests/scipy-notebook/units/unit_pandas.py
+++ b/tests/scipy-notebook/units/unit_pandas.py
@@ -1,6 +1,5 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-
 import numpy as np
 import pandas as pd