diff --git a/src/elements/content-uploader/ContentUploader.tsx b/src/elements/content-uploader/ContentUploader.tsx
index fc854b3641..bb7f84ae05 100644
--- a/src/elements/content-uploader/ContentUploader.tsx
+++ b/src/elements/content-uploader/ContentUploader.tsx
@@ -120,6 +120,7 @@ export interface ContentUploaderProps {
     isExpanded?: boolean;
     onToggle?: (isExpanded: boolean) => void;
     maxFileSize?: number;
+    modernizedDismissDelayMs?: number;
 }
 
 type ModernizedPanelState = 'hidden' | 'shown' | 'dismissing';
@@ -203,6 +204,7 @@ class ContentUploader extends Component<ContentUploaderProps, State> {
         useUploadsManager: false,
         enableModernizedUploads: false,
         isUpgradeModalEnabled: false,
+        modernizedDismissDelayMs: HIDE_MODERNIZED_UPLOAD_MANAGER_DELAY_MS,
     };
 
     /**
@@ -893,7 +895,7 @@ class ContentUploader extends Component<ContentUploaderProps, State> {
     upload = () => {
         const { enableModernizedUploads, isUpgradeModalEnabled, maxFileSize } = this.props;
 
-        if (this.isCancelAllPaused) { 
+        if (this.isCancelAllPaused) {
             return;
         }
 
@@ -1637,6 +1639,7 @@ class ContentUploader extends Component<ContentUploaderProps, State> {
     startModernizedDismissTimer = (): void => {
         this.clearModernizedDismissTimer();
 
+        const { modernizedDismissDelayMs } = this.props;
         const { modernizedPanelState, items } = this.state;
         const isUploadsBatchSuccessfullyComplete = items.every(
             item => item.status === STATUS_COMPLETE || item.status === STATUS_CANCELED,
@@ -1654,7 +1657,7 @@ class ContentUploader extends Component<ContentUploaderProps, State> {
         this.modernizedDismissTimer = setTimeout(() => {
             this.setState({ modernizedPanelState: 'dismissing' });
             this.modernizedDismissTimer = null;
-        }, HIDE_MODERNIZED_UPLOAD_MANAGER_DELAY_MS);
+        }, modernizedDismissDelayMs);
     };
 
     finalizeModernizedDismiss = (): void => {
diff --git a/src/elements/content-uploader/__tests__/ContentUploader.test.js b/src/elements/content-uploader/__tests__/ContentUploader.test.js
index c57b8fa922..b238206c56 100644
--- a/src/elements/content-uploader/__tests__/ContentUploader.test.js
+++ b/src/elements/content-uploader/__tests__/ContentUploader.test.js
@@ -1787,6 +1787,22 @@ describe('elements/content-uploader/ContentUploader', () => {
             expect(wrapper.state('modernizedPanelState')).toBe('dismissing');
         });
 
+        test('honors a custom modernizedDismissDelayMs', () => {
+            const CUSTOM_DELAY_MS = 3000;
+            const setTimeoutSpy = jest.spyOn(global, 'setTimeout');
+            const wrapper = getWrapper({ enableModernizedUploads: true, modernizedDismissDelayMs: CUSTOM_DELAY_MS });
+            armDismissTimer(wrapper);
+
+            expect(setTimeoutSpy).toHaveBeenCalledWith(expect.any(Function), CUSTOM_DELAY_MS);
+
+            jest.advanceTimersByTime(CUSTOM_DELAY_MS - 1);
+            expect(wrapper.state('modernizedPanelState')).toBe('shown');
+
+            jest.advanceTimersByTime(1);
+            expect(wrapper.state('modernizedPanelState')).toBe('dismissing');
+            setTimeoutSpy.mockRestore();
+        });
+
         test('clears timer when a new in-progress item is added mid-wait', () => {
             const wrapper = getWrapper({ enableModernizedUploads: true });
             const instance = armDismissTimer(wrapper);