diff --git a/swh/model/tests/swh_model_data.py b/swh/model/tests/swh_model_data.py
index c4700cb..cd0ef43 100644
--- a/swh/model/tests/swh_model_data.py
+++ b/swh/model/tests/swh_model_data.py
@@ -1,350 +1,360 @@
 # Copyright (C) 2019-2021 The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import datetime
 from typing import Dict, Sequence
 
 import attr
 
 from swh.model.hashutil import MultiHash, hash_to_bytes
 from swh.model.identifiers import ExtendedSWHID
 from swh.model.model import (
     BaseModel,
     Content,
     Directory,
     DirectoryEntry,
     ExtID,
     MetadataAuthority,
     MetadataAuthorityType,
     MetadataFetcher,
     ObjectType,
     Origin,
     OriginVisit,
     OriginVisitStatus,
     Person,
     RawExtrinsicMetadata,
     Release,
     Revision,
     RevisionType,
     SkippedContent,
     Snapshot,
     SnapshotBranch,
     TargetType,
     Timestamp,
     TimestampWithTimezone,
 )
 
 UTC = datetime.timezone.utc
 
 CONTENTS = [
     Content(
         length=4,
         data=f"foo{i}".encode(),
         status="visible",
         **MultiHash.from_data(f"foo{i}".encode()).digest(),
     )
     for i in range(10)
 ] + [
     Content(
         length=14,
         data=f"forbidden foo{i}".encode(),
         status="hidden",
         **MultiHash.from_data(f"forbidden foo{i}".encode()).digest(),
     )
     for i in range(10)
 ]
 
 SKIPPED_CONTENTS = [
     SkippedContent(
         length=4,
         status="absent",
         reason=f"because chr({i}) != '*'",
         **MultiHash.from_data(f"bar{i}".encode()).digest(),
     )
     for i in range(2)
 ]
 
 duplicate_content1 = Content(
     length=4,
     sha1=hash_to_bytes("44973274ccef6ab4dfaaf86599792fa9c3fe4689"),
     sha1_git=b"another-foo",
     blake2s256=b"another-bar",
     sha256=b"another-baz",
     status="visible",
 )
 
 # Craft a sha1 collision
 sha1_array = bytearray(duplicate_content1.sha1_git)
 sha1_array[0] += 1
 duplicate_content2 = attr.evolve(duplicate_content1, sha1_git=bytes(sha1_array))
 
 
 DUPLICATE_CONTENTS = [duplicate_content1, duplicate_content2]
 
 
 COMMITTERS = [
     Person(fullname=b"foo", name=b"foo", email=b""),
     Person(fullname=b"bar", name=b"bar", email=b""),
 ]
 
 DATES = [
     TimestampWithTimezone(
         timestamp=Timestamp(seconds=1234567891, microseconds=0,),
         offset=120,
         negative_utc=False,
     ),
     TimestampWithTimezone(
         timestamp=Timestamp(seconds=1234567892, microseconds=0,),
         offset=120,
         negative_utc=False,
     ),
 ]
 
 REVISIONS = [
     Revision(
         id=hash_to_bytes("4ca486e65eb68e4986aeef8227d2db1d56ce51b3"),
         message=b"hello",
         date=DATES[0],
         committer=COMMITTERS[0],
         author=COMMITTERS[0],
         committer_date=DATES[0],
         type=RevisionType.GIT,
         directory=b"\x01" * 20,
         synthetic=False,
         metadata=None,
         parents=(),
     ),
     Revision(
         id=hash_to_bytes("677063f5c405d6fc1781fc56379c9a9adf43d3a0"),
         message=b"hello again",
         date=DATES[1],
         committer=COMMITTERS[1],
         author=COMMITTERS[1],
         committer_date=DATES[1],
         type=RevisionType.MERCURIAL,
         directory=b"\x02" * 20,
         synthetic=False,
         metadata=None,
         parents=(),
         extra_headers=((b"foo", b"bar"),),
     ),
 ]
 
 EXTIDS = [
     ExtID(extid_type="git256", extid=b"\x03" * 32, target=REVISIONS[0].swhid(),),
     ExtID(extid_type="hg", extid=b"\x04" * 20, target=REVISIONS[1].swhid(),),
 ]
 
 RELEASES = [
     Release(
         id=hash_to_bytes("8059dc4e17fcd0e51ca3bcd6b80f4577d281fd08"),
         name=b"v0.0.1",
         date=TimestampWithTimezone(
             timestamp=Timestamp(seconds=1234567890, microseconds=0,),
             offset=120,
             negative_utc=False,
         ),
         author=COMMITTERS[0],
         target_type=ObjectType.REVISION,
         target=b"\x04" * 20,
         message=b"foo",
         synthetic=False,
     ),
+    Release(
+        id=hash_to_bytes("ee4d20e80af850cc0f417d25dc5073792c5010d2"),
+        name=b"this-is-a/tag/1.0",
+        date=None,
+        author=None,
+        target_type=ObjectType.DIRECTORY,
+        target=b"\x05" * 20,
+        message=b"bar",
+        synthetic=False,
+    ),
 ]
 
 ORIGINS = [
     Origin(url="https://somewhere.org/den/fox",),
     Origin(url="https://overtherainbow.org/fox/den",),
 ]
 
 ORIGIN_VISITS = [
     OriginVisit(
         origin=ORIGINS[0].url,
         date=datetime.datetime(2013, 5, 7, 4, 20, 39, 369271, tzinfo=UTC),
         visit=1,
         type="git",
     ),
     OriginVisit(
         origin=ORIGINS[1].url,
         date=datetime.datetime(2014, 11, 27, 17, 20, 39, tzinfo=UTC),
         visit=1,
         type="hg",
     ),
     OriginVisit(
         origin=ORIGINS[0].url,
         date=datetime.datetime(2018, 11, 27, 17, 20, 39, tzinfo=UTC),
         visit=2,
         type="git",
     ),
     OriginVisit(
         origin=ORIGINS[0].url,
         date=datetime.datetime(2018, 11, 27, 17, 20, 39, tzinfo=UTC),
         visit=3,
         type="git",
     ),
     OriginVisit(
         origin=ORIGINS[1].url,
         date=datetime.datetime(2015, 11, 27, 17, 20, 39, tzinfo=UTC),
         visit=2,
         type="hg",
     ),
 ]
 
 # The origin-visit-status dates needs to be shifted slightly in the future from their
 # visit dates counterpart. Otherwise, we are hitting storage-wise the "on conflict"
 # ignore policy (because origin-visit-add creates an origin-visit-status with the same
 # parameters from the origin-visit {origin, visit, date}...
 ORIGIN_VISIT_STATUSES = [
     OriginVisitStatus(
         origin=ORIGINS[0].url,
         date=datetime.datetime(2013, 5, 7, 4, 20, 39, 432222, tzinfo=UTC),
         visit=1,
         type="git",
         status="ongoing",
         snapshot=None,
         metadata=None,
     ),
     OriginVisitStatus(
         origin=ORIGINS[1].url,
         date=datetime.datetime(2014, 11, 27, 17, 21, 12, tzinfo=UTC),
         visit=1,
         type="hg",
         status="ongoing",
         snapshot=None,
         metadata=None,
     ),
     OriginVisitStatus(
         origin=ORIGINS[0].url,
         date=datetime.datetime(2018, 11, 27, 17, 20, 59, tzinfo=UTC),
         visit=2,
         type="git",
         status="ongoing",
         snapshot=None,
         metadata=None,
     ),
     OriginVisitStatus(
         origin=ORIGINS[0].url,
         date=datetime.datetime(2018, 11, 27, 17, 20, 49, tzinfo=UTC),
         visit=3,
         type="git",
         status="full",
         snapshot=hash_to_bytes("17d0066a4a80aba4a0e913532ee8ff2014f006a9"),
         metadata=None,
     ),
     OriginVisitStatus(
         origin=ORIGINS[1].url,
         date=datetime.datetime(2015, 11, 27, 17, 22, 18, tzinfo=UTC),
         visit=2,
         type="hg",
         status="partial",
         snapshot=hash_to_bytes("8ce268b87faf03850693673c3eb5c9bb66e1ca38"),
         metadata=None,
     ),
 ]
 
 
 DIRECTORIES = [
     Directory(id=hash_to_bytes("4b825dc642cb6eb9a060e54bf8d69288fbee4904"), entries=()),
     Directory(
         id=hash_to_bytes("21416d920e0ebf0df4a7888bed432873ed5cb3a7"),
         entries=(
             DirectoryEntry(
                 name=b"file1.ext",
                 perms=0o644,
                 type="file",
                 target=CONTENTS[0].sha1_git,
             ),
             DirectoryEntry(
                 name=b"dir1",
                 perms=0o755,
                 type="dir",
                 target=hash_to_bytes("4b825dc642cb6eb9a060e54bf8d69288fbee4904"),
             ),
             DirectoryEntry(
                 name=b"subprepo1", perms=0o160000, type="rev", target=REVISIONS[1].id,
             ),
         ),
     ),
 ]
 
 
 SNAPSHOTS = [
     Snapshot(
         id=hash_to_bytes("17d0066a4a80aba4a0e913532ee8ff2014f006a9"),
         branches={
             b"master": SnapshotBranch(
                 target_type=TargetType.REVISION, target=REVISIONS[0].id
             )
         },
     ),
     Snapshot(
         id=hash_to_bytes("8ce268b87faf03850693673c3eb5c9bb66e1ca38"),
         branches={
             b"target/revision": SnapshotBranch(
                 target_type=TargetType.REVISION, target=REVISIONS[0].id,
             ),
             b"target/alias": SnapshotBranch(
                 target_type=TargetType.ALIAS, target=b"target/revision"
             ),
             b"target/directory": SnapshotBranch(
                 target_type=TargetType.DIRECTORY, target=DIRECTORIES[0].id,
             ),
             b"target/release": SnapshotBranch(
                 target_type=TargetType.RELEASE, target=RELEASES[0].id
             ),
             b"target/snapshot": SnapshotBranch(
                 target_type=TargetType.SNAPSHOT,
                 target=hash_to_bytes("17d0066a4a80aba4a0e913532ee8ff2014f006a9"),
             ),
         },
     ),
 ]
 
 
 METADATA_AUTHORITIES = [
     MetadataAuthority(
         type=MetadataAuthorityType.FORGE, url="http://example.org/", metadata={},
     ),
 ]
 
 METADATA_FETCHERS = [
     MetadataFetcher(name="test-fetcher", version="1.0.0", metadata={},)
 ]
 
 RAW_EXTRINSIC_METADATA = [
     RawExtrinsicMetadata(
         target=Origin("http://example.org/foo.git").swhid(),
         discovery_date=datetime.datetime(2020, 7, 30, 17, 8, 20, tzinfo=UTC),
         authority=attr.evolve(METADATA_AUTHORITIES[0], metadata=None),
         fetcher=attr.evolve(METADATA_FETCHERS[0], metadata=None),
         format="json",
         metadata=b'{"foo": "bar"}',
     ),
     RawExtrinsicMetadata(
         target=ExtendedSWHID.from_string(str(CONTENTS[0].swhid())),
         discovery_date=datetime.datetime(2020, 7, 30, 17, 8, 20, tzinfo=UTC),
         authority=attr.evolve(METADATA_AUTHORITIES[0], metadata=None),
         fetcher=attr.evolve(METADATA_FETCHERS[0], metadata=None),
         format="json",
         metadata=b'{"foo": "bar"}',
     ),
 ]
 
 
 TEST_OBJECTS: Dict[str, Sequence[BaseModel]] = {
     "content": CONTENTS,
     "directory": DIRECTORIES,
     "extid": EXTIDS,
     "metadata_authority": METADATA_AUTHORITIES,
     "metadata_fetcher": METADATA_FETCHERS,
     "origin": ORIGINS,
     "origin_visit": ORIGIN_VISITS,
     "origin_visit_status": ORIGIN_VISIT_STATUSES,
     "raw_extrinsic_metadata": RAW_EXTRINSIC_METADATA,
     "release": RELEASES,
     "revision": REVISIONS,
     "snapshot": SNAPSHOTS,
     "skipped_content": SKIPPED_CONTENTS,
 }