diff --git a/mopidy_raspberry_gpio/pinconfig.py b/mopidy_raspberry_gpio/pinconfig.py
index f2d0a7f..f6c7270 100644
--- a/mopidy_raspberry_gpio/pinconfig.py
+++ b/mopidy_raspberry_gpio/pinconfig.py
@@ -1,4 +1,3 @@
-
 from collections import namedtuple
 
 from mopidy import config
@@ -15,7 +14,9 @@ class ValidList(list):
 class PinConfig(config.ConfigValue):
     tuple_pinconfig = namedtuple("PinConfig", ("event", "active", "bouncetime"))
 
-    valid_events = ValidList(["play_pause", "prev", "next", "volume_up", "volume_down"])
+    valid_events = ValidList(
+        ["play_pause", "prev", "next", "volume_up", "volume_down"]
+    )
 
     valid_modes = ValidList(["active_low", "active_high"])
 
diff --git a/tests/test_frontend.py b/tests/test_frontend.py
index 56607e9..427d4e6 100644
--- a/tests/test_frontend.py
+++ b/tests/test_frontend.py
@@ -13,7 +13,7 @@ dummy_config = {
         # Plugins expect settings to be deserialized
         "bcm1": deserialize("play_pause,active_low,30"),
         "bcm2": deserialize("volume_up,active_high,30"),
-        "bcm3": deserialize("volume_down,active_high,30")
+        "bcm3": deserialize("volume_down,active_high,30"),
     }
 }