diff --git a/e2e/maputnik-driver.ts b/e2e/maputnik-driver.ts
index 00733f00..6785fe11 100644
--- a/e2e/maputnik-driver.ts
+++ b/e2e/maputnik-driver.ts
@@ -1,5 +1,6 @@
 import { PlaywrightHelper } from "./playwright-helper";
 import { ModalDriver } from "./modal-driver";
+import emptyStyle from "../src/config/empty-style.json" with { type: "json" };
 
 const baseUrl = "http://localhost:8888/";
 const isMac = process.platform === "darwin";
@@ -56,6 +57,11 @@ export class MaputnikDriver {
         url: "https://www.glyph-server.com/*",
         response: ["Font 1", "Font 2", "Font 3"],
       });
+      await this.helper.given.interceptAndMockResponse({
+        method: "GET",
+        url: /cdn\.jsdelivr\.net\/.*\/empty-style\.json$/,
+        response: emptyStyle,
+      });
     },
   };
 
diff --git a/playwright.config.ts b/playwright.config.ts
index a38daa8a..be2ccf2e 100644
--- a/playwright.config.ts
+++ b/playwright.config.ts
@@ -1,6 +1,10 @@
+import { cpus } from "node:os";
 import { defineConfig, devices } from "@playwright/test";
 
 const isCI = !!process.env.CI;
+// Playwright defaults to CPU / 2 workers,
+// capping the number of workers to 4 to avoid overloading browsers.
+const workers = Math.min(4, Math.max(1, Math.floor(cpus().length / 2)));
 // When the app is already served elsewhere (e.g. the docker e2e job) set
 // E2E_NO_WEBSERVER=1 so Playwright does not start its own dev server.
 const useExternalServer = !!process.env.E2E_NO_WEBSERVER;
@@ -13,6 +17,7 @@ export default defineConfig({
   globalTeardown: "./e2e/utils/e2e-teardown.ts",
   fullyParallel: true,
   forbidOnly: isCI,
+  workers,
   retries: isCI ? 2 : 0,
   reporter: isCI ? [["list"], ["html", { open: "never" }]] : "list",
   use: {