diff --git a/swh/loader/mercurial/tests/test_loader.py b/swh/loader/mercurial/tests/test_loader.py
--- a/swh/loader/mercurial/tests/test_loader.py
+++ b/swh/loader/mercurial/tests/test_loader.py
@@ -58,7 +58,7 @@
     tip_revision_develop = "a9c4534552df370f43f0ef97146f393ef2f2a08c"
     tip_revision_default = "70e750bb046101fdced06f428e73fee471509c56"
     expected_snapshot = {
-        "id": "3b8fe58e467deb7597b12a5fd3b2c096b8c02028",
+        "id": hash_to_bytes("3b8fe58e467deb7597b12a5fd3b2c096b8c02028"),
         "branches": {
             b"develop": {
                 "target": hash_to_bytes(tip_revision_develop),
@@ -136,7 +136,7 @@
 
     expected_snapshot_id = "d35668e02e2ba4321dc951cd308cf883786f918a"
     expected_snapshot = {
-        "id": expected_snapshot_id,
+        "id": hash_to_bytes(expected_snapshot_id),
         "branches": {
             b"default": {
                 "target": hash_to_bytes(tip_revision_default),