Ah, it was other d eps

Author: NullVoxPopuli

test-app/config/ember-try.js

@@ -13,10 +13,13 @@ module.exports = async function () {
           devDependencies: {
             'ember-resolver': '^8.0.0',
             'ember-source': '~3.24.3',
-            'ember-qunit': '^5.1.5',
-            'ember-cli-htmlbars': '^5.3.1',
-            'babel-plugin-htmlbars-inline-precompile': '^5.3.1',
-            'babel-plugin-ember-template-compilation': '^1.0.2',
+            'ember-cli': '^4.0.0',
+            'ember-qunit': '^5.0.0',
+            '@ember/test-helpers': '^2.1.0',
+            'ember-cli-htmlbars': '^5.0.0',
+            '@embroider/core': null,
+            '@embroider/compat': null,
+            '@embroider/webpack': null,
           },
         },
       },