diff --git a/packages/@ember/-internals/views/lib/system/event_dispatcher.ts b/packages/@ember/-internals/views/lib/system/event_dispatcher.ts
index db3512393fc..30082d5c385 100644
--- a/packages/@ember/-internals/views/lib/system/event_dispatcher.ts
+++ b/packages/@ember/-internals/views/lib/system/event_dispatcher.ts
@@ -162,21 +162,6 @@ export default class EventDispatcher extends EmberObject {
       `You cannot use the same root element (${specifiedRootElement}) multiple times in an Ember.Application`,
       !rootElement.classList.contains(ROOT_ELEMENT_CLASS)
     );
-    assert(
-      'You cannot make a new Ember.Application using a root element that is a descendent of an existing Ember.Application',
-      (() => {
-        let target = rootElement.parentNode;
-        while (target instanceof Element) {
-          if (target.classList.contains(ROOT_ELEMENT_CLASS)) {
-            return false;
-          }
-
-          target = target.parentNode;
-        }
-
-        return true;
-      })()
-    );
     assert(
       'You cannot make a new Ember.Application using a root element that is an ancestor of an existing Ember.Application',
       !rootElement.querySelector(ROOT_ELEMENT_SELECTOR)
diff --git a/packages/@ember/application/tests/application_test.js b/packages/@ember/application/tests/application_test.js
index 71fdd5c2fa7..e6336b685fc 100644
--- a/packages/@ember/application/tests/application_test.js
+++ b/packages/@ember/application/tests/application_test.js
@@ -74,16 +74,6 @@ moduleFor(
       });
     }
 
-    [`@test you cannot make a new application that is a descendant of an existing application`]() {
-      expectAssertion(() => {
-        runTask(() =>
-          this.createSecondApplication({
-            rootElement: '#one-child',
-          })
-        );
-      });
-    }
-
     [`@test you cannot make a new application that is a duplicate of an existing application`]() {
       expectAssertion(() => {
         runTask(() =>