diff --git a/test-projects/02-app-that-excludes-mirage/app/templates/application.hbs b/test-projects/02-app-that-excludes-mirage/app/templates/application.hbs
index d94ba08e5..4641b1a20 100644
--- a/test-projects/02-app-that-excludes-mirage/app/templates/application.hbs
+++ b/test-projects/02-app-that-excludes-mirage/app/templates/application.hbs
@@ -3,3 +3,17 @@
 {{#if wifi.isConnected}}
   <p>We ran the initializer</p>
 {{/if}}
+
+<p>
+  Mirage modules in project:
+  <span data-test-id="mirage-module-count">
+    {{mirageModules.length}}
+  </span>
+</p>
+
+<p>
+  Other modules in project:
+  <span data-test-id="other-module-count">
+    {{otherIncludedModules.length}}
+  </span>
+</p>
diff --git a/test-projects/02-app-that-excludes-mirage/package.json b/test-projects/02-app-that-excludes-mirage/package.json
index 56b4a96e9..0e6ec44fe 100644
--- a/test-projects/02-app-that-excludes-mirage/package.json
+++ b/test-projects/02-app-that-excludes-mirage/package.json
@@ -42,7 +42,8 @@
     "fastboot": "*",
     "jsdom": "*",
     "loader.js": "*",
-    "qunit": "*"
+    "qunit": "*",
+    "qunit-dom": "*"
   },
   "engines": {
     "node": ">= 8.*"
diff --git a/test-projects/02-app-that-excludes-mirage/tests/acceptance/modules-test.js b/test-projects/02-app-that-excludes-mirage/tests/acceptance/modules-test.js
new file mode 100644
index 000000000..5974b8c45
--- /dev/null
+++ b/test-projects/02-app-that-excludes-mirage/tests/acceptance/modules-test.js
@@ -0,0 +1,13 @@
+import { test } from 'qunit';
+import moduleForAcceptance from 'basic-app/tests/helpers/module-for-acceptance';
+
+moduleForAcceptance('Acceptance | modules');
+
+test('only 1 module (the no-op initializer) is included in the build', function(assert) {
+  visit('/');
+
+  andThen(function() {
+    assert.dom('[data-test-id="mirage-module-count"]').hasText('0');
+    assert.dom('[data-test-id="other-module-count"]').hasText('1');
+  });
+});