diff --git a/karma.conf.js b/karma.conf.js
index ddca2e34e..c2e3f4582 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -32,7 +32,7 @@ if (process.env.SAUCE_USERNAME && process.env.SAUCE_ACCESS_KEY) {
     sl_latest_safari: {
       base: 'SauceLabs',
       browserName: 'safari',
-      platform: 'macOS 11',
+      platform: 'macOS 12',
       version: 'latest',
     },
   };
@@ -64,11 +64,11 @@ module.exports = (config) => {
     },
     files: [
       {
-        pattern: 'node_modules/@webcomponents/webcomponentsjs/webcomponents-bundle.js',
-        watched: false,
+        pattern: `test/*${config.grep || '*.test.js'}`,
+        type: 'module',
       },
       {
-        pattern: `${config.package || 'core'}/test/*${config.grep || '*.test.js'}`,
+        pattern: `addons/*/test/*${config.grep || '*.test.js'}`,
         type: 'module',
       },
     ],
@@ -115,7 +115,7 @@ module.exports = (config) => {
 
     coverageIstanbulReporter: {
       reports: ['html', 'lcovonly', 'text-summary'],
-      dir: path.join(__dirname, 'coverage', config.package),
+      dir: path.join(__dirname, 'coverage'),
       combineBrowserReports: true,
       skipFilesWithNoCoverage: true,
     },