1 files changed, 7 insertions, 1 deletions
diff --git a/activerecord/test/cases/arel/visitors/dispatch_contamination_test.rb b/activerecord/test/cases/arel/visitors/dispatch_contamination_test.rb
index a07a1a050a..36f9eb49a2 100644
--- a/activerecord/test/cases/arel/visitors/dispatch_contamination_test.rb
+++ b/activerecord/test/cases/arel/visitors/dispatch_contamination_test.rb
@@ -48,7 +48,13 @@ module Arel
         node = Nodes::Union.new(Nodes::True.new, Nodes::False.new)
         assert_equal "( TRUE UNION FALSE )", node.to_sql
 
-        node.first # from Nodes::Node's Enumerable mixin
+        visitor = Class.new(Visitor) {
+          def visit_Arel_Nodes_Union(o); end
+          alias :visit_Arel_Nodes_True  :visit_Arel_Nodes_Union
+          alias :visit_Arel_Nodes_False :visit_Arel_Nodes_Union
+        }.new
+
+        visitor.accept(node)
 
         assert_equal "( TRUE UNION FALSE )", node.to_sql
       end