diff --git a/src/SelectionManager.test.ts b/src/SelectionManager.test.ts
index 6b11698f6..61d3c669c 100644
--- a/src/SelectionManager.test.ts
+++ b/src/SelectionManager.test.ts
@@ -6,27 +6,20 @@
 import { assert } from 'chai';
 import { SelectionManager, SelectionMode } from './SelectionManager';
 import { SelectionModel } from 'browser/selection/SelectionModel';
-import { ITerminal } from './Types';
-import { IBuffer } from 'common/buffer/Types';
 import { IBufferLine } from 'common/Types';
-import { MockTerminal } from './TestUtils.test';
 import { MockBufferService, MockOptionsService, MockCoreService } from 'common/TestUtils.test';
 import { BufferLine } from 'common/buffer/BufferLine';
 import { IBufferService, IOptionsService } from 'common/services/Services';
 import { MockCharSizeService, MockMouseService } from 'browser/TestUtils.test';
 import { CellData } from 'common/buffer/CellData';
-
-class TestMockTerminal extends MockTerminal {
-  emit(event: string, data: any): void {}
-}
+import { IBuffer } from 'common/buffer/Types';
 
 class TestSelectionManager extends SelectionManager {
   constructor(
-    terminal: ITerminal,
     bufferService: IBufferService,
     optionsService: IOptionsService
   ) {
-    super(terminal, null, new MockCharSizeService(10, 10), bufferService, new MockCoreService(), new MockMouseService(), optionsService);
+    super(() => {}, null, null, new MockCharSizeService(10, 10), bufferService, new MockCoreService(), new MockMouseService(), optionsService);
   }
 
   public get model(): SelectionModel { return this._model; }
@@ -44,22 +37,16 @@ class TestSelectionManager extends SelectionManager {
 }
 
 describe('SelectionManager', () => {
-  let terminal: ITerminal;
   let buffer: IBuffer;
   let bufferService: IBufferService;
   let optionsService: IOptionsService;
   let selectionManager: TestSelectionManager;
 
   beforeEach(() => {
-    terminal = new TestMockTerminal();
     optionsService = new MockOptionsService();
     bufferService = new MockBufferService(20, 20, optionsService);
-    terminal.buffers = bufferService.buffers;
-    terminal.cols = 20;
-    terminal.rows = 20;
-    terminal.buffer = terminal.buffers.active;
-    buffer = terminal.buffer;
-    selectionManager = new TestSelectionManager(terminal, bufferService, optionsService);
+    buffer = bufferService.buffer;
+    selectionManager = new TestSelectionManager(bufferService, optionsService);
   });
 
   function stringToRow(text: string): IBufferLine {
diff --git a/src/SelectionManager.ts b/src/SelectionManager.ts
index 381ddcca0..a7f172a6e 100644
--- a/src/SelectionManager.ts
+++ b/src/SelectionManager.ts
@@ -3,14 +3,12 @@
  * @license MIT
  */
 
-import { ITerminal } from './Types';
 import { ISelectionManager, ISelectionRedrawRequestEvent } from 'browser/selection/Types';
 import { IBuffer } from 'common/buffer/Types';
-import { IBufferLine } from 'common/Types';
+import { IBufferLine, IDisposable } from 'common/Types';
 import * as Browser from 'common/Platform';
 import { SelectionModel } from 'browser/selection/SelectionModel';
 import { CellData } from 'common/buffer/CellData';
-import { IDisposable } from 'xterm';
 import { EventEmitter, IEvent } from 'common/EventEmitter';
 import { ICharSizeService, IMouseService } from 'browser/services/Services';
 import { IBufferService, IOptionsService, ICoreService } from 'common/services/Services';
@@ -113,7 +111,8 @@ export class SelectionManager implements ISelectionManager {
   public get onSelectionChange(): IEvent<void> { return this._onSelectionChange.event; }
 
   constructor(
-    private readonly _terminal: ITerminal,
+    private readonly _scrollLines: (amount: number, suppressEvent: boolean) => void,
+    private readonly _element: HTMLElement,
     private readonly _screenElement: HTMLElement,
     private readonly _charSizeService: ICharSizeService,
     private readonly _bufferService: IBufferService,
@@ -625,7 +624,7 @@ export class SelectionManager implements ISelectionManager {
    */
   private _dragScroll(): void {
     if (this._dragScrollAmount) {
-      this._terminal.scrollLines(this._dragScrollAmount, false);
+      this._scrollLines(this._dragScrollAmount, false);
       // Re-evaluate selection
       // If the cursor was above or below the viewport, make sure it's at the
       // start or end of the viewport respectively. This should only happen when
@@ -659,7 +658,7 @@ export class SelectionManager implements ISelectionManager {
       if (event.altKey) {
         const coordinates = this._mouseService.getCoords(
           event,
-          this._terminal.element,
+          this._element,
           this._bufferService.cols,
           this._bufferService.rows,
           false
diff --git a/src/Terminal.ts b/src/Terminal.ts
index 7f1c77532..ac1446348 100644
--- a/src/Terminal.ts
+++ b/src/Terminal.ts
@@ -641,7 +641,11 @@ export class Terminal extends Disposable implements ITerminal, IDisposable, IInp
     this.register(this.onFocus(() => this._renderService.onFocus()));
     this.register(this._renderService.onDimensionsChange(() => this.viewport.syncScrollArea()));
 
-    this.selectionManager = new SelectionManager(this, this.screenElement, this._charSizeService, this._bufferService, this._coreService, this._mouseService, this.optionsService);
+    this.selectionManager = new SelectionManager(
+      (amount: number, suppressEvent: boolean) => this.scrollLines(amount, suppressEvent),
+      this.element, this.screenElement, this._charSizeService, this._bufferService, this._coreService,
+      this._mouseService, this.optionsService
+    );
     this.register(this.selectionManager.onSelectionChange(() => this._onSelectionChange.fire()));
     this.register(addDisposableDomListener(this.element, 'mousedown', (e: MouseEvent) => this.selectionManager.onMouseDown(e)));
     this.register(this.selectionManager.onRedrawRequest(e => this._renderService.onSelectionChanged(e.start, e.end, e.columnSelectMode)));