     func testBasicUpgradeDance() throws {
         let basicUpgrader = NIOWebSocketServerUpgrader(shouldUpgrade: { (channel, head) in channel.eventLoop.makeSucceededFuture(HTTPHeaders()) },
                                               upgradePipelineHandler: { (channel, req) in channel.eventLoop.makeSucceededFuture(()) })
-        let (loop, server, client) = createTestFixtures(upgraders: [basicUpgrader])
+        let (loop, server, client) = self.createTestFixtures(upgraders: [basicUpgrader])
         defer {
             XCTAssertNoThrow(try client.finish())
             XCTAssertNoThrow(try server.finish())

                                                channel.pipeline.addHandler(recorder)

        })
        let (loop, server, client) = createTestFixtures(upgraders: [basicUpgrader])
        defer {
            XCTAssertNoThrow(try client.finish())
            XCTAssertNoThrow(try server.finishAcceptingAlreadyClosed())

                                                  return channel.eventLoop.makeSucceededFuture(())
                                              }
        )
        let (loop, server, client) = self.createTestFixtures(upgraders: [basicUpgrader])
        defer {
            XCTAssertNoThrow(try client.finish())
            XCTAssertNoThrow(try server.finish())
