diff --git a/backend/tests/asset_trigger_dispatch.rs b/backend/tests/asset_trigger_dispatch.rs
index 316069df08..894a98e353 100644
--- a/backend/tests/asset_trigger_dispatch.rs
+++ b/backend/tests/asset_trigger_dispatch.rs
@@ -75,6 +75,12 @@ async fn seed_asset_write(
     .bind(producer_path)
     .execute(db)
     .await?;
+    // The dispatcher caches the per-workspace producer set, normally
+    // invalidated at deploy via the notify_event poller. These tests seed
+    // `asset` rows directly and run no poller, so invalidate here to mirror
+    // what a deploy would do — otherwise a stale cache hides freshly-seeded
+    // producers and nothing dispatches.
+    windmill_queue::asset_dispatch::ASSET_PRODUCER_WRITES_CACHE.remove(WS);
     Ok(())
 }