diff --git a/tests/components/TransitionGroupStub.js b/tests/components/TransitionGroupStub.js
index 84a1ac10e17..be32c291cc8 100644
--- a/tests/components/TransitionGroupStub.js
+++ b/tests/components/TransitionGroupStub.js
@@ -1,3 +1,4 @@
+/* istanbul ignore file */
 export default {
   render(h) {
     const tag = this.tag || this.$vnode.data.tag || 'span'
diff --git a/tests/components/TransitionStub.js b/tests/components/TransitionStub.js
index f9c0bc93977..dd2c338651e 100644
--- a/tests/components/TransitionStub.js
+++ b/tests/components/TransitionStub.js
@@ -1,3 +1,4 @@
+/* istanbul ignore file */
 const getRealChild = vnode => {
   const compOptions = vnode && vnode.componentOptions
   if (compOptions && compOptions.Ctor.options.abstract) {