diff --git a/packages/ember-auto-import/ts/inserter.ts b/packages/ember-auto-import/ts/inserter.ts
index 4e350a8f..6ba95097 100644
--- a/packages/ember-auto-import/ts/inserter.ts
+++ b/packages/ember-auto-import/ts/inserter.ts
@@ -33,7 +33,7 @@ export class Inserter extends Plugin {
     private config: BundleConfig,
     private options: InserterOptions
   ) {
-    super([allApp], {
+    super([allApp, bundler], {
       annotation: 'ember-auto-import-inserter',
       persistentOutput: true,
     });
diff --git a/packages/ember-auto-import/ts/tests/inserter-test.ts b/packages/ember-auto-import/ts/tests/inserter-test.ts
index 38efcc1e..cdd61fb2 100644
--- a/packages/ember-auto-import/ts/tests/inserter-test.ts
+++ b/packages/ember-auto-import/ts/tests/inserter-test.ts
@@ -14,8 +14,22 @@ import { join } from 'path';
 import { Inserter } from '../inserter';
 import BundleConfig from '../bundle-config';
 import { BuildResult, Bundler } from '../bundler';
+import Plugin from 'broccoli-plugin';
+
 const { module: Qmodule, test } = QUnit;
 
+class NoopPlugin extends Plugin {
+  build(): Promise<void> | void {
+    // noop
+  }
+}
+
+function asInputNode(obj: any) {
+  const plugin = new NoopPlugin([]);
+  Object.assign(plugin, obj);
+  return plugin as Bundler;
+}
+
 Qmodule('inserter', function (hooks) {
   let builder: Builder;
   let upstream: string;
@@ -28,7 +42,7 @@ Qmodule('inserter', function (hooks) {
   async function build() {
     let inserter = new Inserter(
       new UnwatchedDir(upstream),
-      { buildResult } as Bundler,
+      asInputNode({ buildResult }),
       bundleConfig,
       {
         publicAssetURL,
diff --git a/test-scenarios/customized-vendor-test.ts b/test-scenarios/customized-vendor-test.ts
index d93ec861..beebb512 100644
--- a/test-scenarios/customized-vendor-test.ts
+++ b/test-scenarios/customized-vendor-test.ts
@@ -124,10 +124,8 @@ function customVendorTest(project: Project, vendorPath: string) {
 }
 
 appScenarios
-  // ember-cli 2.18 has bugs that don't let it actually work with customized
-  // vendor paths. When we bump the lts scenario to something newer we can
-  // drop this check.
-  .skip('lts')
+  // ember-cli 6 has removed custom `outputPaths`
+  .only('lts')
   .expand({
     'customized-vendor-nested': project => customVendorTest(project, '/js/vendor.js'),
     'customized-vendor-top': project => customVendorTest(project, '/top-level-vendor.js'),
@@ -146,10 +144,8 @@ appScenarios
   });
 
 appScenarios
-  // ember-cli 2.18 has bugs that don't let it actually work with customized
-  // vendor paths. When we bump the lts scenario to something newer we can
-  // drop this check.
-  .skip('lts')
+  // ember-cli 6 has removed custom `outputPaths`
+  .only('lts')
   .map('customized-vendor-fastboot', project => {
     customVendorTest(project, '/js/vendor.js');
   })