diff --git a/perma_web/tasks/dev.py b/perma_web/tasks/dev.py
index 71bc3bfc8..7e0de31eb 100644
--- a/perma_web/tasks/dev.py
+++ b/perma_web/tasks/dev.py
@@ -1433,7 +1433,10 @@ def get_etag(bucket, path):
         ).e_tag.strip('"')
 
     # obtain a sample of size n
-    links = Link.objects.filter(cached_can_play_back=True).order_by("?")[:n]
+    links = (
+        Link.objects.filter(warc_size__gt=0) |
+        Link.objects.filter(wacz_size__gt=0)
+    ).order_by("?")[:n]
 
     # build a list of paths
     objects = [