diff --git a/spec/finders/sequel_test_connector.rb b/spec/finders/sequel_test_connector.rb
index <HASH>..<HASH> 100644
--- a/spec/finders/sequel_test_connector.rb
+++ b/spec/finders/sequel_test_connector.rb
@@ -1,5 +1,11 @@
 require 'sequel'
 
+Symbol.class_eval do
+  # Active Record calculations tries `as` on some objects but chokes when that
+  # object was a Symbol and it gets a Sequel::SQL::AliasedExpression.
+  undef as if method_defined? :as
+end
+
 db = Sequel.sqlite
 
 db.create_table :cars do
fix Active Record choking on a core ext from Sequel