Passing in a Hash instance as kwargs parameters requires the "double splat" prefix

actioncable/lib/action_cable/connection/test_case.rb

@@ -185,7 +185,7 @@ def connect(path = ActionCable.server.config.mount_path, **request_params)
 
           connection = self.class.connection_class.allocate
           connection.singleton_class.include(TestConnection)
-          connection.send(:initialize, build_test_request(path, request_params))
+          connection.send(:initialize, build_test_request(path, **request_params))
           connection.connect if connection.respond_to?(:connect)
 
           # Only set instance variable if connected successfully

activejob/lib/active_job/exceptions.rb

@@ -115,7 +115,7 @@ def discard_on(*exceptions)
     #    end
     #  end
     def retry_job(options = {})
-      instrument :enqueue_retry, options.slice(:error, :wait) do
+      instrument :enqueue_retry, **options.slice(:error, :wait) do
         enqueue options
       end
     end

activerecord/lib/active_record/connection_adapters/postgresql/oid/specialized_string.rb

@@ -9,7 +9,7 @@ class SpecializedString < Type::String # :nodoc:
 
           def initialize(type, **options)
             @type = type
-            super(options)
+            super(**options)
           end
         end
       end