diff --git a/test/e2e/val-switch.sh b/test/e2e/val-switch.sh
index 1e48422..3b41a25 100755
--- a/test/e2e/val-switch.sh
+++ b/test/e2e/val-switch.sh
@@ -63,11 +63,19 @@ fi
 # a naive wipe-per-switch costs an interactive `docker-credential-atcr login` on
 # every batch. Restoring a snapshot keeps the session alive across every batch
 # that shares a level.
-LEVEL=$(ls pkg/appview/db/migrations/*.yaml 2>/dev/null \
-  | sed -E 's|.*/([0-9]{4})_.*|\1|' | sort -n | tail -1)
+# Key the snapshot on the FULL SET of migrations present, not the highest one.
+# Batching reorders migrations: val/04 carries e75b2e2, whose migration is 0031,
+# while 0028-0030 arrive later in batches 09, 12 and 14. So val/04 holds
+# {..0027, 0031} and val/09 holds {..0027, 0028, 0031} — both have a max of
+# 0031, and keying on the max would restore val/04's snapshot onto val/09, which
+# needs 0028's schema. The fingerprint distinguishes them.
+MIGS=$(ls pkg/appview/db/migrations/*.yaml 2>/dev/null \
+  | sed -E 's|.*/([0-9]{4})_.*|\1|' | sort -n)
+LEVEL=$(printf '%s\n' "$MIGS" | tail -1)
 LEVEL=${LEVEL:-0000}
-SNAP="$SNAPDIR/ui.level-${LEVEL}.db"
-echo "==> branch migration level: ${LEVEL}"
+FINGERPRINT=$(printf '%s\n' "$MIGS" | md5sum | cut -c1-8)
+SNAP="$SNAPDIR/ui.level-${LEVEL}-${FINGERPRINT}.db"
+echo "==> branch migrations: max ${LEVEL}, set ${FINGERPRINT} ($(printf '%s\n' "$MIGS" | wc -l) files)"
 
 echo "==> tearing down appview"
 docker compose rm -sf atcr-appview