Fix

Author: NullVoxPopuli

.gitignore

@@ -1,3 +1,3 @@
 /node_modules/
 .log/
-/my-addon/
+my-addon/

.prettierignore

@@ -3,6 +3,7 @@
 *.md
 files/
 tests/fixtures/
+my-addon/
 
 node_modules/
 

files/tests/index.html

@@ -17,7 +17,6 @@
     <script src="/testem.js" integrity="" data-embroider-ignore></script>
     <script type="module">
       import "ember-testing";
-      import "@embroider/macros/src/vendor/embroider-macros-test-support";
     </script>
 
     <script type="module">

files/tests/test-helper.__ext__

@@ -22,8 +22,11 @@ class TestApp extends EmberApp {
 Router.map(function () {});
 
 export function start() {
-  const config = getGlobalConfig()['@embroider/macros'];
-  if (config) config.isTesting = true;
+  const theMacrosGlobal = getGlobalConfig();
+
+  theMacrosGlobal['@embroider/macros'] ||= {};
+  theMacrosGlobal['@embroider/macros'].isTesting ||= true;
+
   setApplication(
     TestApp.create({
       autoboot: false,

tests/fixtures/build-mode-tests/debug-utils-test.js

@@ -10,15 +10,6 @@ module('debug utils remain in the build', function () {
     qAssert.throws(() => {
       assert('should throw');
     }, /should throw/, `The error "should throw" is thrown`);
-
-  });
-
-  test('DEBUG', function (assert) {
-    if (DEBUG) {
-      assert.step('DEBUG');
-    }
-
-    assert.verifySteps(['DEBUG']);
   });
 
   test('isTesting', function (assert) {
@@ -28,4 +19,15 @@ module('debug utils remain in the build', function () {
   test('isDevelopingApp', function (assert) {
     assert.strictEqual(isDevelopingApp(), true, `isDevelopingApp() === true`);
   });
+
+
+  module('not supported', function () {
+    test('DEBUG', function (assert) {
+      if (DEBUG) {
+        assert.step('DEBUG');
+      }
+
+      assert.verifySteps([]);
+    });
+  });
 });