diff --git a/x-pack/plugins/reporting/public/panel_actions/get_csv_panel_action.test.ts b/x-pack/plugins/reporting/public/panel_actions/get_csv_panel_action.test.ts
index 105c5cd109533..f07235742a1d3 100644
--- a/x-pack/plugins/reporting/public/panel_actions/get_csv_panel_action.test.ts
+++ b/x-pack/plugins/reporting/public/panel_actions/get_csv_panel_action.test.ts
@@ -18,7 +18,11 @@ describe('GetCsvReportPanelAction', () => {
 
   beforeAll(() => {
     if (typeof window.URL.revokeObjectURL === 'undefined') {
-      Object.defineProperty(window.URL, 'revokeObjectURL', { value: () => {} });
+      Object.defineProperty(window.URL, 'revokeObjectURL', {
+        configurable: true,
+        writable: true,
+        value: () => {},
+      });
     }
   });
 
diff --git a/x-pack/plugins/security_solution/public/detections/components/value_lists_management_modal/auto_download.test.tsx b/x-pack/plugins/security_solution/public/detections/components/value_lists_management_modal/auto_download.test.tsx
index 53dcf986d395c..be84c37d40606 100644
--- a/x-pack/plugins/security_solution/public/detections/components/value_lists_management_modal/auto_download.test.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/value_lists_management_modal/auto_download.test.tsx
@@ -12,8 +12,8 @@ import { AutoDownload } from './auto_download';
 
 describe('AutoDownload', () => {
   beforeEach(() => {
-    // our DOM environment lacks this function that our component needs
     Object.defineProperty(globalNode.window.URL, 'revokeObjectURL', {
+      configurable: true,
       writable: true,
       value: jest.fn(),
     });