diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2e0ae055..246db446 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -84,9 +84,8 @@ jobs:
       - name: Install
         run: yarn install --frozen-lockfile
       - name: Build
-        run: bun run --filter '*' build
+        run: yarn build
       - name: Generate
         run: bun run --filter '*' generate
       - name: Unit Tests
         run: bun run --bun --filter '*' test:unit
-
diff --git a/packages/as-sha256/package.json b/packages/as-sha256/package.json
index 76a304ff..5e5fdc8b 100644
--- a/packages/as-sha256/package.json
+++ b/packages/as-sha256/package.json
@@ -34,9 +34,7 @@
     "build:web": "webpack --mode production --entry ./index.js --output ./dist/as-sha256.min.js",
     "build": "yarn asbuild && yarn asbuild:simd && yarn generate && yarn build:lib",
     "test:unit": "vitest run --dir test/unit/",
-    "test:browsers": "yarn test:browsers:chrome && yarn test:browsers:firefox",
-    "test:browsers:chrome": "vitest run --browser chrome --config ./vitest.browser.config.ts --dir test/unit",
-    "test:browsers:firefox": "vitest run --browser firefox --config ./vitest.browser.config.ts --dir test/unit",
+    "test:browsers": "vitest run --config ./vitest.browser.config.ts --dir test/unit",
     "benchmark": "node -r ts-node/register ./node_modules/.bin/benchmark 'test/perf/*.test.ts'",
     "benchmark:local": "yarn benchmark --local",
     "test:ci": "yarn test:as-ci"
diff --git a/vitest.base.browser.config.ts b/vitest.base.browser.config.ts
index 2735ddae..1ef5d630 100644
--- a/vitest.base.browser.config.ts
+++ b/vitest.base.browser.config.ts
@@ -1,5 +1,5 @@
 import { defineConfig, mergeConfig } from "vitest/config";
-import {nodePolyfills} from "vite-plugin-node-polyfills";
+import { nodePolyfills } from "vite-plugin-node-polyfills";
 
 import baseConfig from "./vitest.base.unit.config";
 
@@ -9,17 +9,24 @@ export default mergeConfig(
     plugins: [
       nodePolyfills({
         include: ["buffer", "crypto", "util", "stream"],
-        globals: {Buffer: true},
+        globals: { Buffer: true },
         protocolImports: true,
       }),
     ],
     test: {
       browser: {
-        name: "chrome",
         headless: true,
         provider: "webdriverio",
         screenshotFailures: false,
+        instances: [{ browser: "chrome" }, { browser: "firefox" }],
       },
     },
+    optimizeDeps: {
+      include: [
+        "vite-plugin-node-polyfills/shims/buffer",
+        "vite-plugin-node-polyfills/shims/global",
+        "vite-plugin-node-polyfills/shims/process",
+      ],
+    },
   })
 );