diff --git a/extmod/uasyncio/event.py b/extmod/uasyncio/event.py
index c28ad1fb31..1954c80f54 100644
--- a/extmod/uasyncio/event.py
+++ b/extmod/uasyncio/event.py
@@ -57,6 +57,5 @@ try:
                 yield core._io_queue.queue_read(self)
             self._flag = 0
 
-
 except ImportError:
     pass
diff --git a/ports/stm32/make-stmconst.py b/ports/stm32/make-stmconst.py
index 602bdc6c19..217a801a8f 100644
--- a/ports/stm32/make-stmconst.py
+++ b/ports/stm32/make-stmconst.py
@@ -17,7 +17,6 @@ if platform.python_version_tuple()[0] == "2":
     def convert_bytes_to_str(b):
         return b
 
-
 elif platform.python_version_tuple()[0] == "3":
 
     def convert_bytes_to_str(b):
diff --git a/tests/extmod/utimeq1.py b/tests/extmod/utimeq1.py
index 234d7a31dd..ddbc969afb 100644
--- a/tests/extmod/utimeq1.py
+++ b/tests/extmod/utimeq1.py
@@ -17,7 +17,6 @@ if DEBUG:
     def dprint(*v):
         print(*v)
 
-
 else:
 
     def dprint(*v):
diff --git a/tools/pydfu.py b/tools/pydfu.py
index ea658d300b..f2d845a70b 100755
--- a/tools/pydfu.py
+++ b/tools/pydfu.py
@@ -84,7 +84,6 @@ if "length" in getargspec(usb.util.get_string).args:
     def get_string(dev, index):
         return usb.util.get_string(dev, 255, index)
 
-
 else:
     # PyUSB 1.0.0.b2 dropped the length argument
     def get_string(dev, index):