Index: tests/test_demo.py
===================================================================
diff -u -rae1e423f7cf68432e1e3daf01b50a162de4563e4 -r322377decd72091859c355c84705276e89cd140e
--- tests/test_demo.py	(.../test_demo.py)	(revision ae1e423f7cf68432e1e3daf01b50a162de4563e4)
+++ tests/test_demo.py	(.../test_demo.py)	(revision 322377decd72091859c355c84705276e89cd140e)
@@ -63,6 +63,7 @@
         # simulate off button pressed
         hd.buttons.cmd_off_button_override(BUTTON_PRESSED, NO_RESET)
 
+
 def test_hd_blood_flow(ml_per_min=110):
     """
     Sets the HD blood flow rate (mL / min)