diff -r 05db41701ece -r efbbc2f9121e tests/test-revlog-raw.py
--- a/tests/test-revlog-raw.py	Mon Nov 07 22:12:59 2022 -0500
+++ b/tests/test-revlog-raw.py	Sun Nov 06 16:56:23 2022 -0500
@@ -1,7 +1,6 @@
 # test revlog interaction about raw data (flagprocessor)
 
 
-import collections
 import hashlib
 import sys
 
@@ -472,16 +471,16 @@
 
 
 def findsnapshottest(rlog):
-    resultall = collections.defaultdict(list)
-    deltas._findsnapshots(rlog, resultall, 0)
-    resultall = dict(resultall.items())
+    cache = deltas.SnapshotCache()
+    cache.update(rlog)
+    resultall = dict(cache.snapshots)
     if resultall != snapshotmapall:
         print('snapshot map  differ:')
         print('  expected: %s' % snapshotmapall)
         print('  got:      %s' % resultall)
-    result15 = collections.defaultdict(list)
-    deltas._findsnapshots(rlog, result15, 15)
-    result15 = dict(result15.items())
+    cache15 = deltas.SnapshotCache()
+    cache15.update(rlog, 15)
+    result15 = dict(cache15.snapshots)
     if result15 != snapshotmap15:
         print('snapshot map  differ:')
         print('  expected: %s' % snapshotmap15)