diff --git a/fslite/fs/methods.py b/fslite/fs/methods.py
index adf67fe..133b528 100644
--- a/fslite/fs/methods.py
+++ b/fslite/fs/methods.py
@@ -184,10 +184,10 @@ def set_params(self, **kwargs):
 #         return self.__str__()
 
 
-class InvalidMethodError(Exception):
+class InvalidMethodError(ValueError):
     """
     Error raised when an invalid feature selection method is used.
     """
 
     def __init__(self, message):
-        super().__init__(message)
+        super().__init__(f"Invalid feature selection method: {message}")