diff --git a/src/AccessibilityManager.ts b/src/AccessibilityManager.ts
index bb6e08d4..d2fe7e1a 100644
--- a/src/AccessibilityManager.ts
+++ b/src/AccessibilityManager.ts
@@ -88,6 +88,10 @@ export class AccessibilityManager implements IDisposable {
     this._rowElements = null;
   }
 
+  public get isNavigationModeActive(): boolean {
+    return this._navigationMode.isActive;
+  }
+
   private _onResize(cols: number, rows: number): void {
     // Grow rows as required
     for (let i = this._rowContainer.children.length; i < this._terminal.rows; i++) {
diff --git a/src/utils/TestUtils.test.ts b/src/utils/TestUtils.test.ts
index ee28bd11..89b03530 100644
--- a/src/utils/TestUtils.test.ts
+++ b/src/utils/TestUtils.test.ts
@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { ITerminal, IBuffer, IBufferSet, IBrowser, ICharMeasure, ISelectionManager, ITerminalOptions, IListenerType, IInputHandlingTerminal, IViewport, ICircularList, ICompositionHelper, ITheme, ILinkifier, IMouseHelper } from '../Interfaces';
+import { ITerminal, IBuffer, IBufferSet, IBrowser, ICharMeasure, ISelectionManager, ITerminalOptions, IListenerType, IInputHandlingTerminal, IViewport, ICircularList, ICompositionHelper, ITheme, ILinkifier, IMouseHelper, IDisposable } from '../Interfaces';
 import { LineData } from '../Types';
 import { Buffer } from '../Buffer';
 import * as Browser from './Browser';
@@ -42,6 +42,9 @@ export class MockTerminal implements ITerminal {
   off(type: string, listener: IListenerType): void {
     throw new Error('Method not implemented.');
   }
+  addDisposableListener(type: string, handler: IListenerType): IDisposable {
+    throw new Error('Method not implemented.');
+  }
   scrollLines(disp: number, suppressScrollEvent: boolean): void {
     throw new Error('Method not implemented.');
   }
@@ -193,6 +196,9 @@ export class MockInputHandlingTerminal implements IInputHandlingTerminal {
   emit(type: string, data?: any): void {
     throw new Error('Method not implemented.');
   }
+  addDisposableListener(type: string, handler: IListenerType): IDisposable {
+    throw new Error('Method not implemented.');
+  }
 }
 
 export class MockBuffer implements IBuffer {
@@ -229,6 +235,9 @@ export class MockRenderer implements IRenderer {
   emit(type: string, data?: any): void {
     throw new Error('Method not implemented.');
   }
+  addDisposableListener(type: string, handler: IListenerType): IDisposable {
+    throw new Error('Method not implemented.');
+  }
   dimensions: IRenderDimensions;
   setTheme(theme: ITheme): IColorSet { return <IColorSet>{}; }
   onResize(cols: number, rows: number, didCharSizeChange: boolean): void {}