diff --git a/lib/database_cleaner/configuration.rb b/lib/database_cleaner/configuration.rb
index d690ff4..53acfe0 100644
--- a/lib/database_cleaner/configuration.rb
+++ b/lib/database_cleaner/configuration.rb
@@ -14,13 +14,11 @@ module DatabaseCleaner
     end 
 
     def strategy=(strategy)
-      add_cleaner(:autodetect) if none?
       values.each { |cleaner| cleaner.strategy = strategy }
       remove_duplicates
     end
 
     def orm=(orm)
-      add_cleaner(:autodetect) if none?
       values.each { |cleaner| cleaner.orm = orm }
       remove_duplicates
     end