diff --git a/core/input/mouse.js b/core/input/mouse.js
index 82ea335a..4d015669 100644
--- a/core/input/mouse.js
+++ b/core/input/mouse.js
@@ -8,7 +8,6 @@ import * as Log from '../util/logging.js';
 import { setCapture, stopEvent, getPointerEvent } from '../util/events.js';
 
 const WHEEL_STEP = 10; // Delta threshold for a mouse wheel step
-const WHEEL_STEP_TIMEOUT = 50; // ms
 const WHEEL_LINE_HEIGHT = 19;
 
 export default class Mouse {
@@ -16,8 +15,6 @@ export default class Mouse {
         this._target = target || document;
 
         this._pos = null;
-        this._wheelStepXTimer = null;
-        this._wheelStepYTimer = null;
         this._accumulatedWheelDeltaX = 0;
         this._accumulatedWheelDeltaY = 0;
 
@@ -102,16 +99,7 @@ export default class Mouse {
         this._accumulatedWheelDeltaY = 0;
     }
 
-    _resetWheelStepTimers() {
-        window.clearTimeout(this._wheelStepXTimer);
-        window.clearTimeout(this._wheelStepYTimer);
-        this._wheelStepXTimer = null;
-        this._wheelStepYTimer = null;
-    }
-
     _handleMouseWheel(e) {
-        this._resetWheelStepTimers();
-
         this._updateMousePosition(e);
 
         let dX = e.deltaX;
@@ -136,17 +124,9 @@ export default class Mouse {
         // after a timeout.
         if (Math.abs(this._accumulatedWheelDeltaX) > WHEEL_STEP) {
             this._generateWheelStepX();
-        } else {
-            this._wheelStepXTimer =
-                window.setTimeout(this._generateWheelStepX.bind(this),
-                                  WHEEL_STEP_TIMEOUT);
         }
         if (Math.abs(this._accumulatedWheelDeltaY) > WHEEL_STEP) {
             this._generateWheelStepY();
-        } else {
-            this._wheelStepYTimer =
-                window.setTimeout(this._generateWheelStepY.bind(this),
-                                  WHEEL_STEP_TIMEOUT);
         }
 
         stopEvent(e);
@@ -214,8 +194,6 @@ export default class Mouse {
     ungrab() {
         const t = this._target;
 
-        this._resetWheelStepTimers();
-
         t.removeEventListener('mousedown', this._eventHandlers.mousedown);
         t.removeEventListener('mouseup', this._eventHandlers.mouseup);
         t.removeEventListener('mousemove', this._eventHandlers.mousemove);
diff --git a/tests/test.mouse.js b/tests/test.mouse.js
index 8830c4be..9e06ff26 100644
--- a/tests/test.mouse.js
+++ b/tests/test.mouse.js
@@ -90,9 +90,6 @@ describe('Mouse Event Handling', function () {
 
     describe('Accumulate mouse wheel events with small delta', function () {
 
-        beforeEach(function () { this.clock = sinon.useFakeTimers(); });
-        afterEach(function () { this.clock.restore(); });
-
         it('should accumulate wheel events if small enough', function () {
             const mouse = new Mouse(target);
             mouse.onmousebutton = sinon.spy();
@@ -100,7 +97,6 @@ describe('Mouse Event Handling', function () {
             mouse._handleMouseWheel(mouseevent(
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 4, deltaY: 0, deltaMode: 0 }));
-            this.clock.tick(10);
             mouse._handleMouseWheel(mouseevent(
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 4, deltaY: 0, deltaMode: 0 }));
@@ -108,14 +104,12 @@ describe('Mouse Event Handling', function () {
             // threshold is 10
             expect(mouse._accumulatedWheelDeltaX).to.be.equal(8);
 
-            this.clock.tick(10);
             mouse._handleMouseWheel(mouseevent(
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 4, deltaY: 0, deltaMode: 0 }));
 
             expect(mouse.onmousebutton).to.have.callCount(2); // mouse down and up
 
-            this.clock.tick(10);
             mouse._handleMouseWheel(mouseevent(
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 4, deltaY: 9, deltaMode: 0 }));
@@ -133,11 +127,9 @@ describe('Mouse Event Handling', function () {
             mouse._handleMouseWheel(mouseevent(
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 11, deltaY: 0, deltaMode: 0 }));
-            this.clock.tick(10);
             mouse._handleMouseWheel(mouseevent(
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 0, deltaY: 70, deltaMode: 0 }));
-            this.clock.tick(10);
             mouse._handleMouseWheel(mouseevent(
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 400, deltaY: 400, deltaMode: 0 }));
@@ -145,18 +137,6 @@ describe('Mouse Event Handling', function () {
             expect(mouse.onmousebutton).to.have.callCount(8); // mouse down and up
         });
 
-        it('should send even small wheel events after a timeout', function () {
-            const mouse = new Mouse(target);
-            mouse.onmousebutton = sinon.spy();
-
-            mouse._handleMouseWheel(mouseevent(
-                'mousewheel', { clientX: 18, clientY: 40,
-                                deltaX: 1, deltaY: 0, deltaMode: 0 }));
-            this.clock.tick(51); // timeout on 50 ms
-
-            expect(mouse.onmousebutton).to.have.callCount(2); // mouse down and up
-        });
-
         it('should account for non-zero deltaMode', function () {
             const mouse = new Mouse(target);
             mouse.onmousebutton = sinon.spy();
@@ -165,8 +145,6 @@ describe('Mouse Event Handling', function () {
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 0, deltaY: 2, deltaMode: 1 }));
 
-            this.clock.tick(10);
-
             mouse._handleMouseWheel(mouseevent(
                 'mousewheel', { clientX: 18, clientY: 40,
                                 deltaX: 1, deltaY: 0, deltaMode: 2 }));