diff --git a/types/ember/test/private/computed-tests.ts b/types/ember/test/private/computed-tests.ts
index 8877bf62b2..38bf1088df 100644
--- a/types/ember/test/private/computed-tests.ts
+++ b/types/ember/test/private/computed-tests.ts
@@ -77,27 +77,35 @@ ex2.firstName; // $ExpectType string
 
 type UnwStringSet = UnwrapComputedPropertySetter<string>; // $ExpectType string
 type UnwStringGet = UnwrapComputedPropertyGetter<string>; // $ExpectType string
+// $ExpectType string
 type UnwCpStringSet1 = UnwrapComputedPropertySetter<
     Ember.ComputedProperty<string>
->; // $ExpectType string
+>;
+// $ExpectType string
 type UnwCpStringGet1 = UnwrapComputedPropertyGetter<
     Ember.ComputedProperty<string>
->; // $ExpectType string
+>;
+// $ExpectType string
 type UnwCpStringSet2 = UnwrapComputedPropertySetter<
     Ember.ComputedProperty<string, string>
->; // $ExpectType string
+>;
+// $ExpectType string
 type UnwCpStringGet2 = UnwrapComputedPropertyGetter<
     Ember.ComputedProperty<string, string>
->; // $ExpectType string
+>;
+// $ExpectType string
 type UnwCpStringSet3 = UnwrapComputedPropertySetter<
     Ember.ComputedProperty<number, string>
->; // $ExpectType string
+>;
+// $ExpectType number
 type UnwCpStringGet3 = UnwrapComputedPropertyGetter<
     Ember.ComputedProperty<number, string>
->; // $ExpectType number
+>;
+// $ExpectType number
 type UnwCpStringSet4 = UnwrapComputedPropertySetter<
     Ember.ComputedProperty<string, number>
->; // $ExpectType number
+>;
+// $ExpectType string
 type UnwCpStringGet4 = UnwrapComputedPropertyGetter<
     Ember.ComputedProperty<string, number>
->; // $ExpectType string
+>;
diff --git a/types/ember/test/private/observable-tests.ts b/types/ember/test/private/observable-tests.ts
index 4ef17fda3c..cde17b04ab 100644
--- a/types/ember/test/private/observable-tests.ts
+++ b/types/ember/test/private/observable-tests.ts
@@ -7,12 +7,13 @@ import {
     UnwrapComputedPropertyGetters,
     UnwrapComputedPropertySetters
 } from '@ember/object/-private/types';
+import Observable from "@ember/object/observable";
 
 class OtherThing {
     observerOfDemo(target: DemoObservable, key: 'foo') {}
 }
 
-class DemoObservable implements Ember.Observable {
+class DemoObservable implements Observable {
     foo: string;
     isFoo = true;
     bar: [boolean, boolean];