diff --git a/playwright.config.ts b/playwright.config.ts
index 670b8ee..3d90633 100644
--- a/playwright.config.ts
+++ b/playwright.config.ts
@@ -10,6 +10,8 @@ export default defineConfig({
   fullyParallel: true,
   forbidOnly: !!process.env.CI,
   retries: process.env.CI ? 2 : 0,
+  // CI : un seul navigateur à la fois ; deux rastériseurs logiciels se disputent le CPU du runner.
+  workers: process.env.CI ? 1 : undefined,
   reporter: 'html',
   // Well above Playwright's 5 s, which was a fair ceiling when the star catalogue was 820 kB and
   // is not now that the scheduled refresh has it at 5.4 MB and 447 410 rows: every one of these