diff --git a/obsstudio_sdk/callback.py b/obsstudio_sdk/callback.py
index 9015997..8aa9a0c 100644
--- a/obsstudio_sdk/callback.py
+++ b/obsstudio_sdk/callback.py
@@ -14,7 +14,7 @@ class Callback:
     def get(self) -> list:
         """returns a list of registered events"""
 
-        return [to_camel_case(fn.__name__) for fn in self._callbacks]
+        return [to_camel_case(fn.__name__[2:]) for fn in self._callbacks]
 
     def trigger(self, event, data):
         """trigger callback on update"""
diff --git a/obsstudio_sdk/util.py b/obsstudio_sdk/util.py
index 59dbcc3..51fe39a 100644
--- a/obsstudio_sdk/util.py
+++ b/obsstudio_sdk/util.py
@@ -3,13 +3,11 @@ from dataclasses import dataclass
 
 
 def to_camel_case(s):
-    s = "".join(word.title() for word in s.split("_"))
-    return s[2:]
+    return "".join(word.title() for word in s.split("_"))
 
 
 def to_snake_case(s):
-    s = re.sub(r"(?<!^)(?=[A-Z])", "_", s).lower()
-    return f"{s}"
+    return re.sub(r"(?<!^)(?=[A-Z])", "_", s).lower()
 
 
 def as_dataclass(identifier, data):