lib/httpx/adapters/faraday.rb

@@ -169,8 +169,6 @@ module Faraday
         end
 
         def run
-          return unless @handlers.last
-
           env = @handlers.last.env
 
           session = HTTPX.session.with(options_from_env(env))

test/adapters/faraday_test.rb

@@ -45,11 +45,6 @@ class FaradayTest < Minitest::Test
     refute_nil resp1.env[:error]
   end
 
-  def test_adapter_in_parallel_no_requests
-    connection = create_connection
-    assert_nil(connection.in_parallel {})
-  end
-
   def test_adapter_get_handles_compression
     res = get(build_path("/gzip"))
     assert JSON.parse(res.body.to_s)["gzipped"]