diff --git a/package.json b/package.json
index 23661d73..4915cf3e 100644
--- a/package.json
+++ b/package.json
@@ -38,11 +38,11 @@
     "test-api-chromium": "node ./bin/test_api.js --browser=chromium --timeout=20000",
     "test-api-firefox": "node ./bin/test_api.js --browser=firefox --timeout=20000",
     "test-api-webkit": "node ./bin/test_api.js --browser=webkit --timeout=20000",
-    "test-playwright": "node ./bin/test_playwright.js --workers 4",
-    "test-playwright-chromium": "node ./bin/test_playwright.js --workers 4 \"--project=Chrome Stable\"",
-    "test-playwright-firefox": "node ./bin/test_playwright.js --workers 4 \"--project=Firefox Stable\"",
-    "test-playwright-webkit": "node ./bin/test_playwright.js --workers 4 \"--project=WebKit\"",
-    "test-playwright-debug": "node ./bin/test_playwright.js --headed --workers 1 --timeout 30000",
+    "test-playwright": "node ./bin/test_playwright.js --workers=75%",
+    "test-playwright-chromium": "node ./bin/test_playwright.js --workers=75% \"--project=Chrome Stable\"",
+    "test-playwright-firefox": "node ./bin/test_playwright.js --workers=75% \"--project=Firefox Stable\"",
+    "test-playwright-webkit": "node ./bin/test_playwright.js --workers=75% \"--project=WebKit\"",
+    "test-playwright-debug": "node ./bin/test_playwright.js  --workers=1 --headed --timeout=30000",
     "test-unit": "node ./bin/test.js",
     "test-unit-coverage": "node ./bin/test.js --coverage",
     "test-unit-dev": "cross-env NODE_PATH='./out' mocha",