diff --git a/ContextualPopupDecorator/tests/ContextualPopupDecorator-specs.js b/ContextualPopupDecorator/tests/ContextualPopupDecorator-specs.js
index 6a7de4ee6..7c2870772 100644
--- a/ContextualPopupDecorator/tests/ContextualPopupDecorator-specs.js
+++ b/ContextualPopupDecorator/tests/ContextualPopupDecorator-specs.js
@@ -13,6 +13,8 @@ const keyDown = (keyCode) => (picker) => fireEvent.keyDown(picker, {keyCode});
 
 const leftKeyDown = keyDown(37);
 
+let MockObserverInstance;
+
 describe('ContextualPopupDecorator Specs', () => {
 	beforeEach(() => {
 		global.Element.prototype.getBoundingClientRect = jest.fn(() => {
@@ -25,6 +27,12 @@ describe('ContextualPopupDecorator Specs', () => {
 				right: 0
 			};
 		});
+
+		MockObserverInstance = {
+			observe: jest.fn(),
+			disconnect: jest.fn()
+		};
+		global.ResizeObserver = jest.fn().mockImplementation(() => MockObserverInstance);
 	});
 
 	test('should emit onOpen event with type when opening', () => {
@@ -507,14 +515,14 @@ describe('ContextualPopupDecorator Specs', () => {
 	});
 
 	test('should create and observe with `ResizeObserver` and disconnect when the popup close', () => {
-		const originalObserver = global.ResizeObserver;
+		//const originalObserver = global.ResizeObserver;
 
-		const MockObserverInstance = {
+		/*const MockObserverInstance = {
 			observe: jest.fn(),
 			disconnect: jest.fn()
 		};
 		global.ResizeObserver = jest.fn().mockImplementation(() => MockObserverInstance);
-
+		*/
 		const message = 'goodbye';
 		const Root = FloatingLayerDecorator('div');
 		render(
@@ -541,6 +549,6 @@ describe('ContextualPopupDecorator Specs', () => {
 
 		expect(MockObserverInstance.disconnect).toHaveBeenCalled();
 		*/
-		global.ResizeObserver = originalObserver;
+		//global.ResizeObserver = originalObserver;
 	});
 });