diff --git a/packages/create-instance/create-instance.js b/packages/create-instance/create-instance.js
index b6a7436b4..641d92b61 100644
--- a/packages/create-instance/create-instance.js
+++ b/packages/create-instance/create-instance.js
@@ -38,9 +38,6 @@ export default function createInstance (
   options: Options,
   _Vue: Component
 ): Component {
-  // Remove cached constructor
-  delete component._Ctor
-
   // make sure all extends are based on this instance
   _Vue.options._base = _Vue
 
diff --git a/packages/server-test-utils/src/renderToString.js b/packages/server-test-utils/src/renderToString.js
index 7c02d4138..15b42267e 100644
--- a/packages/server-test-utils/src/renderToString.js
+++ b/packages/server-test-utils/src/renderToString.js
@@ -22,8 +22,6 @@ export default function renderToString (
       `renderToString must be run in node. It cannot be ` + `run in a browser`
     )
   }
-  // Remove cached constructor
-  delete component._Ctor
 
   if (options.attachToDocument) {
     throwError(`you cannot use attachToDocument with ` + `renderToString`)
diff --git a/packages/shared/create-component-stubs.js b/packages/shared/create-component-stubs.js
index 83813234e..e4d93aa8d 100644
--- a/packages/shared/create-component-stubs.js
+++ b/packages/shared/create-component-stubs.js
@@ -149,11 +149,6 @@ export function createStubsFromStubsObject (
       return acc
     }
 
-    if (originalComponents[stubName]) {
-      // Remove cached constructor
-      delete originalComponents[stubName]._Ctor
-    }
-
     if (typeof stub === 'string') {
       acc[stubName] = createStubFromString(
         stub,
@@ -195,8 +190,6 @@ function stubComponents (
       )
       return
     }
-    // Remove cached constructor
-    delete componentOptions._Ctor
 
     stubbedComponents[component] = createStubFromComponent(
       cmp,
diff --git a/packages/test-utils/src/mount.js b/packages/test-utils/src/mount.js
index fb75e4ee9..6b83346cb 100644
--- a/packages/test-utils/src/mount.js
+++ b/packages/test-utils/src/mount.js
@@ -25,9 +25,6 @@ export default function mount (
 
   warnIfNoWindow()
 
-  // Remove cached constructor
-  delete component._Ctor
-
   const elm = options.attachToDocument ? createElement() : undefined
 
   const mergedOptions = mergeOptions(options, config)
diff --git a/test/specs/wrapper/find.spec.js b/test/specs/wrapper/find.spec.js
index 28aac23a9..f7a1a3907 100644
--- a/test/specs/wrapper/find.spec.js
+++ b/test/specs/wrapper/find.spec.js
@@ -291,16 +291,23 @@ describeWithShallowAndMount('find', mountingMethod => {
     expect(wrapper.find(Component).vnode).to.be.an('object')
   })
 
-  it('returns array of VueWrappers of Vue Components matching component if component name in parent is different to filename', () => {
+  it('returns Wrapper matching selector using Wrapper as reference', () => {
     const wrapper = mountingMethod(ComponentWithChild)
     const div = wrapper.find('span')
     expect(div.find(Component).vnode).to.be.an('object')
   })
 
-  it('returns Wrapper matching selector using Wrapper as reference', () => {
-    const wrapper = mountingMethod(ComponentWithChild)
-    const div = wrapper.find('span')
-    expect(div.find(Component).vnode).to.be.an('object')
+  it('selector works between mounts', () => {
+    const ChildComponent = { template: '<div />' }
+    const TestComponent = {
+      template: '<child-component />',
+      components: {
+        ChildComponent
+      }
+    }
+    const wrapper = mountingMethod(TestComponent)
+    mountingMethod(ChildComponent)
+    expect(wrapper.find(ChildComponent).vnode).to.be.an('object')
   })
 
   it('returns error Wrapper if Vue component is below Wrapper', () => {