diff --git a/eslint.config.mjs b/eslint.config.mjs
index e4ae552a..04b8412d 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -28,7 +28,7 @@ export default [
     ignores: [
       'tests/fixture/*',
       'tests/fixture-ts/*',
-      'files/ember-cli-build.js',
+      'files/ember-cli-build.*',
     ],
   },
 ];
diff --git a/files/_js_eslint.config.mjs b/files/_js_eslint.config.mjs
index 7e5a2d6e..bc5ab150 100644
--- a/files/_js_eslint.config.mjs
+++ b/files/_js_eslint.config.mjs
@@ -72,16 +72,7 @@ export default [
    * CJS node files
    */
   {
-    files: [
-      '**/*.cjs',
-      'config/**/*.js',
-      'testem.js',
-      'testem*.js',
-      '.prettierrc.js',
-      '.stylelintrc.js',
-      '.template-lintrc.js',
-      'ember-cli-build.js',
-    ],
+    files: ['**/*.cjs', 'ember-cli-build.*', 'config/*'],
     plugins: {
       n,
     },
diff --git a/files/_ts_eslint.config.mjs b/files/_ts_eslint.config.mjs
index 84bb692e..de87a30f 100644
--- a/files/_ts_eslint.config.mjs
+++ b/files/_ts_eslint.config.mjs
@@ -92,16 +92,7 @@ export default ts.config(
    * CJS node files
    */
   {
-    files: [
-      '**/*.cjs',
-      'config/**/*.js',
-      'testem.js',
-      'testem*.js',
-      '.prettierrc.js',
-      '.stylelintrc.js',
-      '.template-lintrc.js',
-      'ember-cli-build.js',
-    ],
+    files: ['**/*.cjs', 'ember-cli-build.*', 'config/*'],
     plugins: {
       n,
     },
diff --git a/tests/default.test.mjs b/tests/default.test.mjs
index 9ec5dcb9..94b49947 100644
--- a/tests/default.test.mjs
+++ b/tests/default.test.mjs
@@ -131,7 +131,7 @@ describe('basic functionality', function () {
     },
   },
   middleware: [
-    require(__dirname + '/testem-proxy.js')('${appURL}')
+    require(__dirname + '/testem-proxy.cjs')('${appURL}')
   ],
 };
 `,
diff --git a/tests/fixture-ts/testem-proxy.js b/tests/fixture-ts/testem-proxy.cjs
similarity index 100%
rename from tests/fixture-ts/testem-proxy.js
rename to tests/fixture-ts/testem-proxy.cjs
diff --git a/tests/fixture/testem-proxy.js b/tests/fixture/testem-proxy.cjs
similarity index 100%
rename from tests/fixture/testem-proxy.js
rename to tests/fixture/testem-proxy.cjs