diff --git a/minimal-notebook/test/test_inkscape.py b/minimal-notebook/test/test_inkscape.py
index e8f50e2c..fdb0fbcf 100644
--- a/minimal-notebook/test/test_inkscape.py
+++ b/minimal-notebook/test/test_inkscape.py
@@ -10,7 +10,8 @@ def test_inkscape(container):
     """Inkscape shall be installed to be able to convert SVG files."""
     LOGGER.info("Test that inkscape is working by printing its version ...")
     c = container.run(
-        tty=True, command=["start.sh", "bash", "-c", "inkscape --version"]
+        tty=True,
+        command=["start.sh", "bash", "-c", "inkscape --version"]
     )
     c.wait(timeout=10)
     logs = c.logs(stdout=True).decode("utf-8")
diff --git a/scipy-notebook/test/test_extensions.py b/scipy-notebook/test/test_extensions.py
index cf6b53eb..460760a7 100644
--- a/scipy-notebook/test/test_extensions.py
+++ b/scipy-notebook/test/test_extensions.py
@@ -26,7 +26,8 @@ def test_check_extension(container, extension):
     """
     LOGGER.info(f"Checking the extension: {extension} ...")
     c = container.run(
-        tty=True, command=["start.sh", "jupyter", "labextension", "check", extension]
+        tty=True,
+        command=["start.sh", "jupyter", "labextension", "check", extension]
     )
     rv = c.wait(timeout=10)
     logs = c.logs(stdout=True).decode("utf-8")