diff --git a/tests/performance/config/global-setup.js b/tests/performance/config/global-setup.js
index 25e99a47d8457..0c8063cf1a5a5 100644
--- a/tests/performance/config/global-setup.js
+++ b/tests/performance/config/global-setup.js
@@ -30,7 +30,12 @@ async function globalSetup( config ) {
 	await requestUtils.setupRest();
 
 	// Reset the test environment before running the tests.
-	await Promise.all( [ requestUtils.activateTheme( 'twentytwentyone' ) ] );
+	await Promise.all( [
+		requestUtils.activateTheme( 'twentytwentyone' ),
+		requestUtils.deleteAllPosts(),
+		requestUtils.deleteAllBlocks(),
+		requestUtils.resetPreferences(),
+	] );
 
 	await requestContext.dispose();
 }
diff --git a/tests/performance/playwright.config.js b/tests/performance/playwright.config.js
index c4df0e2872953..100521f642489 100644
--- a/tests/performance/playwright.config.js
+++ b/tests/performance/playwright.config.js
@@ -7,7 +7,7 @@ import { defineConfig } from '@playwright/test';
 /**
  * WordPress dependencies
  */
-import baseConfig from '@wordpress/scripts/config/playwright.config';
+const baseConfig = require( '@wordpress/scripts/config/playwright.config' );
 
 process.env.WP_ARTIFACTS_PATH ??= path.join( process.cwd(), 'artifacts' );
 process.env.STORAGE_STATE_PATH ??= path.join(
@@ -33,8 +33,8 @@ const config = defineConfig( {
 		command: 'npm run env:start',
 	},
 	use: {
-		...baseConfig.use,
 		video: 'off',
+		browserName: 'chromium', // Use only Chromium.
 	},
 } );