diff --git a/src/worker/mod.rs b/src/worker/mod.rs
index d04033d..ab0364d 100644
--- a/src/worker/mod.rs
+++ b/src/worker/mod.rs
@@ -2136,6 +2136,10 @@ mod tests {
         )
         .await
         .expect("store winning attempt object");
+        if let Ok(expected_backend) = std::env::var("IMAGEFORGE_TEST_EXPECT_STORAGE_BACKEND") {
+            assert_eq!(stale_object.backend, expected_backend);
+            assert_eq!(winning_object.backend, expected_backend);
+        }
 
         let period_start = Utc::now() - chrono::Duration::hours(1);
         let period_end = Utc::now() + chrono::Duration::days(30);