Fix broken `ServerTest` with Capybara 3.0.0

It seems that it is no longer possible to specify the value held by
`Capybara.server` as sever.

Ref: https://github.com/teamcapybara/capybara/commit/ba7674086cbcd3b22d3614011815bc5d483e5960

1 files changed, 1 insertions, 5 deletions

diff --git a/actionpack/test/dispatch/system_testing/server_test.rb b/actionpack/test/dispatch/system_testing/server_test.rb
index 740e90a4da..33d2f6a645 100644
--- a/actionpack/test/dispatch/system_testing/server_test.rb
+++ b/actionpack/test/dispatch/system_testing/server_test.rb
@@ -5,10 +5,6 @@ require "capybara/dsl"
 require "action_dispatch/system_testing/server"
 
 class ServerTest < ActiveSupport::TestCase
-  setup do
-    @old_capybara_server = Capybara.server
-  end
-
   test "port is always included" do
     ActionDispatch::SystemTesting::Server.new.run
     assert Capybara.always_include_port, "expected Capybara.always_include_port to be true"
@@ -27,6 +23,6 @@ class ServerTest < ActiveSupport::TestCase
   end
 
   teardown do
-    Capybara.server = @old_capybara_server
+    Capybara.server = :default
   end
 end