diff --git a/lib/lol_dba/index_finding/index_finder.rb b/lib/lol_dba/index_finding/index_finder.rb
index a9c9f78..cc1a9e3 100644
--- a/lib/lol_dba/index_finding/index_finder.rb
+++ b/lib/lol_dba/index_finding/index_finder.rb
@@ -68,7 +68,7 @@ def self.primary_key(table_name)
 
     def self.model_classes
       ActiveRecord::Base.descendants.select do |obj|
-        Class == obj.class && session_store?(obj)
+        Class == obj.class && session_store?(obj) && obj.table_exists?
       end
     end