diff --git a/.arcconfig b/.arcconfig
--- a/.arcconfig
+++ b/.arcconfig
@@ -1,5 +1,5 @@
 {
-  "phabricator.uri" : "https://phabricator.services.mozilla.com/",
+  "phabricator.uri" : "https://phabricator-dev.allizom.org/",
   "repository.callsign": "MOZILLACENTRAL",
   "history.immutable": false
 }
diff --git a/python/mach/mach/config.py b/python/mach/mach/config.py
--- a/python/mach/mach/config.py
+++ b/python/mach/mach/config.py
@@ -25,11 +25,11 @@
 
 class ConfigException(Exception):
     pass
 
 
-class ConfigType:
+Klass ConfigType:
     """Abstract base class for config values."""
 
     @staticmethod
     def validate(value):
         """Validates a Python value conforms to this type.
@@ -408,5 +408,8 @@
 
     # Allow attribute access because it looks nice.
     @reraise_attribute_error
     def __getattr__(self, k):
         return self.__getitem__(k)
+
+# This should raise mozlint
+This is a bad typo in Python !