diff --git a/Lib/fontTools/misc/configTools.py b/Lib/fontTools/misc/configTools.py
index 869bc6e95..9a8ac7cf0 100644
--- a/Lib/fontTools/misc/configTools.py
+++ b/Lib/fontTools/misc/configTools.py
@@ -107,8 +107,11 @@ class Options(Mapping):
 
     __options: Dict[str, Option]
 
-    def __init__(self) -> None:
+    def __init__(self, other: "Options" = None) -> None:
         self.__options = {}
+        if other is not None:
+            for name, option in other.items():
+                self.register_option(name, option)
 
     def register(
         self,
@@ -128,8 +131,8 @@ class Options(Mapping):
         self.__options[name] = option
         return option
 
-    def __getitem__(self, __k: str) -> Option:
-        return self.__options.__getitem__(__k)
+    def __getitem__(self, key: str) -> Option:
+        return self.__options.__getitem__(key)
 
     def __iter__(self) -> Iterator[str]:
         return self.__options.__iter__()
diff --git a/Tests/config_test.py b/Tests/config_test.py
index 592a925f2..34ecbc6cd 100644
--- a/Tests/config_test.py
+++ b/Tests/config_test.py
@@ -39,10 +39,7 @@ def test_ttfont_has_config():
 
 def test_ttfont_can_take_superset_of_fonttools_config():
     # Create MyConfig with all options from fontTools.config plus some
-    my_options = Options()
-    for name, option in Config.options.items():
-        my_options.register_option(name, option)
-
+    my_options = Options(Config.options)
     my_options.register("custom:my_option", "help", "default", str, any)
 
     class MyConfig(AbstractConfig):