diff --git a/src/sys/deno/deno-copy-tasks.ts b/src/sys/deno/deno-copy-tasks.ts
index 71b8b29e6e6..eaeac7f2d8c 100644
--- a/src/sys/deno/deno-copy-tasks.ts
+++ b/src/sys/deno/deno-copy-tasks.ts
@@ -1,6 +1,6 @@
 import type * as d from '../../declarations';
 import type { Deno } from '../../../types/lib.deno';
-import { buildError, catchError, flatOne, normalizePath, unique } from '@utils';
+import { buildError, catchError, flatOne, normalizePath } from '@utils';
 import { basename, dirname, expandGlob, isGlob, isAbsolute, join, resolve } from './deps';
 
 export async function denoCopyTasks(deno: typeof Deno, copyTasks: Required<d.CopyTask>[], srcDir: string) {
@@ -13,8 +13,6 @@ export async function denoCopyTasks(deno: typeof Deno, copyTasks: Required<d.Cop
   try {
     copyTasks = flatOne(await Promise.all(copyTasks.map(task => processGlobs(task, srcDir))));
 
-    copyTasks = unique(copyTasks, task => task.dest);
-
     const allCopyTasks: d.CopyTask[] = [];
 
     // figure out all the file copy tasks we'll have
diff --git a/src/sys/node/node-copy-tasks.ts b/src/sys/node/node-copy-tasks.ts
index 8f890c58285..27ec5d333e9 100644
--- a/src/sys/node/node-copy-tasks.ts
+++ b/src/sys/node/node-copy-tasks.ts
@@ -1,5 +1,5 @@
 import * as d from '../../declarations';
-import { buildError, catchError, flatOne, isGlob, normalizePath, unique } from '@utils';
+import { buildError, catchError, flatOne, isGlob, normalizePath } from '@utils';
 import { copyFile, mkdir, readdir, stat } from './node-fs-promisify';
 import path from 'path';
 import glob from 'glob';
@@ -14,8 +14,6 @@ export async function nodeCopyTasks(copyTasks: Required<d.CopyTask>[], srcDir: s
   try {
     copyTasks = flatOne(await Promise.all(copyTasks.map(task => processGlobs(task, srcDir))));
 
-    copyTasks = unique(copyTasks, task => task.dest);
-
     const allCopyTasks: d.CopyTask[] = [];
 
     // figure out all the file copy tasks we'll have
diff --git a/test/end-to-end/src/car-detail/assets-a/file-1.txt b/test/end-to-end/src/car-detail/assets-a/file-1.txt
new file mode 100644
index 00000000000..4036f0fd4d3
--- /dev/null
+++ b/test/end-to-end/src/car-detail/assets-a/file-1.txt
@@ -0,0 +1 @@
+file-1.txt
\ No newline at end of file
diff --git a/test/end-to-end/src/car-detail/car-detail.tsx b/test/end-to-end/src/car-detail/car-detail.tsx
index fd44f4d4b4d..8bd53c97613 100644
--- a/test/end-to-end/src/car-detail/car-detail.tsx
+++ b/test/end-to-end/src/car-detail/car-detail.tsx
@@ -1,9 +1,9 @@
 import { Component, Prop, h } from '@stencil/core';
 import { CarData } from '../car-list/car-data';
 
-
 @Component({
-  tag: 'car-detail'
+  tag: 'car-detail',
+  assetsDirs: ['assets-a'],
 })
 export class CarDetail {
   @Prop() car: CarData;
diff --git a/test/end-to-end/src/car-list/assets-a/file-2.txt b/test/end-to-end/src/car-list/assets-a/file-2.txt
new file mode 100644
index 00000000000..5042efb8f3b
--- /dev/null
+++ b/test/end-to-end/src/car-list/assets-a/file-2.txt
@@ -0,0 +1 @@
+file-2.txt
\ No newline at end of file
diff --git a/test/end-to-end/src/car-list/car-list.tsx b/test/end-to-end/src/car-list/car-list.tsx
index 802b4d93ccb..138e49432cc 100644
--- a/test/end-to-end/src/car-list/car-list.tsx
+++ b/test/end-to-end/src/car-list/car-list.tsx
@@ -9,7 +9,8 @@ import { CarData } from './car-data';
 @Component({
   tag: 'car-list',
   styleUrl: 'car-list.css',
-  shadow: true
+  shadow: true,
+  assetsDirs: ['assets-a'],
 })
 export class CarList {
   @Prop() cars: CarData[];
diff --git a/test/end-to-end/src/dom-api/assets-b/file-3.txt b/test/end-to-end/src/dom-api/assets-b/file-3.txt
new file mode 100644
index 00000000000..89dfefbca44
--- /dev/null
+++ b/test/end-to-end/src/dom-api/assets-b/file-3.txt
@@ -0,0 +1 @@
+file-3.txt
\ No newline at end of file
diff --git a/test/end-to-end/src/dom-api/dom-api.tsx b/test/end-to-end/src/dom-api/dom-api.tsx
index 7090d04d73d..4bbaf38ea64 100644
--- a/test/end-to-end/src/dom-api/dom-api.tsx
+++ b/test/end-to-end/src/dom-api/dom-api.tsx
@@ -1,10 +1,10 @@
 import { Component, h } from '@stencil/core';
 
 @Component({
-  tag: 'dom-api'
+  tag: 'dom-api',
+  assetsDirs: ['assets-b'],
 })
 export class DomApiCmp {
-
   render() {
     return (
       <span data-z="z" class="red green blue" data-a="a">
diff --git a/test/end-to-end/test-end-to-end-dist.js b/test/end-to-end/test-end-to-end-dist.js
index bee644b3412..17d51319228 100644
--- a/test/end-to-end/test-end-to-end-dist.js
+++ b/test/end-to-end/test-end-to-end-dist.js
@@ -32,6 +32,10 @@ fs.accessSync(path.join(typesDir, 'car-list', 'car-list.d.ts'));
 const wwwDir = path.join(__dirname, 'www');
 fs.accessSync(path.join(wwwDir, 'build', 'endtoend.js'));
 fs.accessSync(path.join(wwwDir, 'build', 'endtoend.esm.js'));
+fs.accessSync(path.join(wwwDir, 'build', 'endtoend.css'));
+fs.accessSync(path.join(wwwDir, 'build', 'assets-a/file-1.txt'));
+fs.accessSync(path.join(wwwDir, 'build', 'assets-a/file-2.txt'));
+fs.accessSync(path.join(wwwDir, 'build', 'assets-b/file-3.txt'));
 fs.accessSync(path.join(wwwDir, 'index.html'));
 
 fs.accessSync(path.join(__dirname, 'dist-react', 'components.ts'));