diff --git a/vitest.config.ts b/vitest.config.ts
index 2c8eb06170..1844b5cbcc 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -243,6 +243,8 @@ export default defineConfig({
         'packages/client/ui-workspace/src/client/index.ts',
         'packages/test-support/client-runtime/src/translate.ts',
         'packages/client/ui-primitives/src/JsonTree.tsx',
+        'packages/extensions/*/src/**/*.ts',
+        'packages/extensions/*/src/**/*.tsx',
         // Typert generator: correctness is pinned by its fixture suites and
         // the byte-for-byte catalog reproduction test; per-file coverage
         // would put whole-workspace compiler analysis under v8