diff --git a/lib/kitchen/provisioner/chef_zero.rb b/lib/kitchen/provisioner/chef_zero.rb
index e2f5c6eac..cc3edb4ed 100644
--- a/lib/kitchen/provisioner/chef_zero.rb
+++ b/lib/kitchen/provisioner/chef_zero.rb
@@ -99,10 +99,10 @@ def add_optional_chef_client_args!(args)
         # these flags are modern/chef-client local most only and will not work
         # on older versions of chef-client
         if config[:chef_zero_host]
-          args <<  "--chef-zero-host #{config[:chef_zero_host]}"
+          args << "--chef-zero-host #{config[:chef_zero_host]}"
         end
         if config[:chef_zero_port]
-          args <<  "--chef-zero-port #{config[:chef_zero_port]}"
+          args << "--chef-zero-port #{config[:chef_zero_port]}"
         end
       end