diff --git a/addon/with-test-waiter.js b/addon/with-test-waiter.js
index 1f23718..0aec9e9 100644
--- a/addon/with-test-waiter.js
+++ b/addon/with-test-waiter.js
@@ -9,8 +9,6 @@ let taskRunCounter = 0;
 // waiter so async test helpers will block anytime a task instance spawned
 // from that property is running.
 export default function withTestWaiter(taskProperty) {
-  assert("withTestWaiter() will only work with ember-concurrency >=0.7.19 -- please upgrade", Object.prototype.hasOwnProperty.call(taskProperty, 'taskFn'));
-
   let originalTaskFn = taskProperty.taskFn;
 
   taskProperty.taskFn = function *(...args) {