1 files changed, 1 insertions, 1 deletions
diff --git a/test/visitors/test_dot.rb b/test/visitors/test_dot.rb
index 2909d87799..b311246436 100644
--- a/test/visitors/test_dot.rb
+++ b/test/visitors/test_dot.rb
@@ -16,7 +16,7 @@ module Arel
         Nodes::Avg,
       ].each do |klass|
         define_method("test_#{klass.name.gsub('::', '_')}") do
-          op = klass.new(:a, :z)
+          op = klass.new(:a, "z")
           @visitor.accept op
         end
       end