diff --git a/src/platforms/web/runtime/modules/transition.js b/src/platforms/web/runtime/modules/transition.js
index 6fdcad22..1753685d 100644
--- a/src/platforms/web/runtime/modules/transition.js
+++ b/src/platforms/web/runtime/modules/transition.js
@@ -38,7 +38,6 @@ export function nextFrame (fn: Function) {
 
 export function enter (vnode: VNodeWithData) {
   const el: any = vnode.elm
-  const vm = vnode.context
 
   // call leave callback now
   if (el._leaveCb) {
@@ -84,7 +83,7 @@ export function enter (vnode: VNodeWithData) {
     enterHook &&
     // enterHook may be a bound method which exposes
     // the length of original fn as _length
-    (enterHook._length || enterHook.length) > 2
+    (enterHook._length || enterHook.length) > 1
 
   const cb = el._enterCb = once(() => {
     if (expectsCSS) {
@@ -94,9 +93,9 @@ export function enter (vnode: VNodeWithData) {
       if (expectsCSS) {
         removeTransitionClass(el, startClass)
       }
-      enterCancelledHook && enterCancelledHook(el, vm)
+      enterCancelledHook && enterCancelledHook(el)
     } else {
-      afterEnterHook && afterEnterHook(el, vm)
+      afterEnterHook && afterEnterHook(el)
     }
     el._enterCb = null
   })
@@ -108,11 +107,11 @@ export function enter (vnode: VNodeWithData) {
     if (pendingNode && pendingNode.tag === vnode.tag && pendingNode.elm._leaveCb) {
       pendingNode.elm._leaveCb()
     }
-    enterHook && enterHook(el, vm, cb)
+    enterHook && enterHook(el, cb)
   })
 
   // start enter transition
-  beforeEnterHook && beforeEnterHook(el, vm)
+  beforeEnterHook && beforeEnterHook(el)
   if (expectsCSS) {
     addTransitionClass(el, startClass)
     addTransitionClass(el, activeClass)
@@ -131,7 +130,6 @@ export function enter (vnode: VNodeWithData) {
 
 export function leave (vnode: VNodeWithData, rm: Function) {
   const el: any = vnode.elm
-  const vm = vnode.context
 
   // call enter callback now
   if (el._enterCb) {
@@ -160,7 +158,7 @@ export function leave (vnode: VNodeWithData, rm: Function) {
     leave &&
     // leave hook may be a bound method which exposes
     // the length of original fn as _length
-    (leave._length || leave.length) > 2
+    (leave._length || leave.length) > 1
 
   const cb = el._leaveCb = once(() => {
     if (el.parentNode && el.parentNode._pending) {
@@ -173,10 +171,10 @@ export function leave (vnode: VNodeWithData, rm: Function) {
       if (expectsCSS) {
         removeTransitionClass(el, leaveClass)
       }
-      leaveCancelled && leaveCancelled(el, vm)
+      leaveCancelled && leaveCancelled(el)
     } else {
       rm()
-      afterLeave && afterLeave(el, vm)
+      afterLeave && afterLeave(el)
     }
     el._leaveCb = null
   })
@@ -192,7 +190,7 @@ export function leave (vnode: VNodeWithData, rm: Function) {
     if (!vnode.data.show) {
       (el.parentNode._pending || (el.parentNode._pending = {}))[vnode.key] = vnode
     }
-    beforeLeave && beforeLeave(el, vm)
+    beforeLeave && beforeLeave(el)
     if (expectsCSS) {
       addTransitionClass(el, leaveClass)
       addTransitionClass(el, leaveActiveClass)
@@ -203,7 +201,7 @@ export function leave (vnode: VNodeWithData, rm: Function) {
         }
       })
     }
-    leave && leave(el, vm, cb)
+    leave && leave(el, cb)
     if (!expectsCSS && !userWantsControl) {
       cb()
     }
diff --git a/test/unit/features/transition/transition.spec.js b/test/unit/features/transition/transition.spec.js
index 01833ca4..50b94bb8 100644
--- a/test/unit/features/transition/transition.spec.js
+++ b/test/unit/features/transition/transition.spec.js
@@ -4,7 +4,7 @@ import { isIE9 } from 'web/util/index'
 import { nextFrame } from 'web/runtime/modules/transition'
 
 if (!isIE9) {
-  describe('Transition system', () => {
+  fdescribe('Transition system', () => {
     const duration = injectStyles()
 
     let el
@@ -203,23 +203,23 @@ if (!isIE9) {
         `,
         data: { ok: true },
         methods: {
-          beforeLeave: (el, vm) => {
+          beforeLeave: (el) => {
             expect(el).toBe(vm.$el.children[0])
             expect(el.className).toBe('test')
-            beforeLeaveSpy(el, vm)
+            beforeLeaveSpy(el)
           },
-          leave: (el, vm) => onLeaveSpy(el, vm),
-          afterLeave: (el, vm) => afterLeaveSpy(el, vm),
-          beforeEnter: (el, vm) => {
+          leave: (el) => onLeaveSpy(el),
+          afterLeave: (el) => afterLeaveSpy(el),
+          beforeEnter: (el) => {
             expect(vm.$el.contains(el)).toBe(false)
             expect(el.className).toBe('test')
-            beforeEnterSpy(el, vm)
+            beforeEnterSpy(el)
           },
-          enter: (el, vm) => {
+          enter: (el) => {
             expect(vm.$el.contains(el)).toBe(true)
-            onEnterSpy(el, vm)
+            onEnterSpy(el)
           },
-          afterEnter: (el, vm) => afterEnterSpy(el, vm)
+          afterEnter: (el) => afterEnterSpy(el)
         }
       }).$mount(el)
 
@@ -229,26 +229,26 @@ if (!isIE9) {
       let _el = vm.$el.children[0]
       vm.ok = false
       waitForUpdate(() => {
-        expect(beforeLeaveSpy).toHaveBeenCalledWith(_el, vm)
-        expect(onLeaveSpy).toHaveBeenCalledWith(_el, vm)
+        expect(beforeLeaveSpy).toHaveBeenCalledWith(_el)
+        expect(onLeaveSpy).toHaveBeenCalledWith(_el)
         expect(vm.$el.children[0].className).toBe('test test-leave test-leave-active')
       }).thenWaitFor(nextFrame).then(() => {
         expect(afterLeaveSpy).not.toHaveBeenCalled()
         expect(vm.$el.children[0].className).toBe('test test-leave-active')
       }).thenWaitFor(duration + 10).then(() => {
-        expect(afterLeaveSpy).toHaveBeenCalledWith(_el, vm)
+        expect(afterLeaveSpy).toHaveBeenCalledWith(_el)
         expect(vm.$el.children.length).toBe(0)
         vm.ok = true
       }).then(() => {
         _el = vm.$el.children[0]
-        expect(beforeEnterSpy).toHaveBeenCalledWith(_el, vm)
-        expect(onEnterSpy).toHaveBeenCalledWith(_el, vm)
+        expect(beforeEnterSpy).toHaveBeenCalledWith(_el)
+        expect(onEnterSpy).toHaveBeenCalledWith(_el)
         expect(vm.$el.children[0].className).toBe('test test-enter test-enter-active')
       }).thenWaitFor(nextFrame).then(() => {
         expect(afterEnterSpy).not.toHaveBeenCalled()
         expect(vm.$el.children[0].className).toBe('test test-enter-active')
       }).thenWaitFor(duration + 10).then(() => {
-        expect(afterEnterSpy).toHaveBeenCalledWith(_el, vm)
+        expect(afterEnterSpy).toHaveBeenCalledWith(_el)
         expect(vm.$el.children[0].className).toBe('test')
       }).then(done)
     })
@@ -263,10 +263,10 @@ if (!isIE9) {
         </div>`,
         data: { ok: true },
         methods: {
-          enter: (el, vm, cb) => {
+          enter: (el, cb) => {
             next = cb
           },
-          leave: (el, vm, cb) => {
+          leave: (el, cb) => {
             next = cb
           }
         }