diff --git a/src/borg/testsuite/crypto.py b/src/borg/testsuite/crypto.py
index fd0a57e77..7950f58f2 100644
--- a/src/borg/testsuite/crypto.py
+++ b/src/borg/testsuite/crypto.py
@@ -1,18 +1,15 @@
 from binascii import hexlify
 from unittest.mock import MagicMock
 import unittest
-from binascii import a2b_base64
 
-import pytest
 
 from ..crypto.low_level import AES256_CTR_HMAC_SHA256, AES256_OCB, CHACHA20_POLY1305, UNENCRYPTED, \
                                IntegrityError, is_libressl
 from ..crypto.low_level import bytes_to_long, bytes_to_int, long_to_bytes
 from ..crypto.low_level import hkdf_hmac_sha512
 from ..crypto.low_level import AES, hmac_sha256
-from ..crypto.key import KeyfileKey, UnsupportedKeyFormatError, RepoKey, FlexiKey
+from ..crypto.key import KeyfileKey, RepoKey, FlexiKey
 from ..helpers import msgpack
-from ..constants import KEY_ALGORITHMS
 
 from . import BaseTestCase
 
@@ -310,47 +307,6 @@ def test_decrypt_key_file_pbkdf2_sha256_aes256_ctr_hmac_sha256():
     assert decrypted == plain
 
 
-def test_decrypt_key_file_unsupported_algorithm():
-    """We will add more algorithms in the future. We should raise a helpful error."""
-    key = KeyfileKey(None)
-    encrypted = msgpack.packb({
-        'algorithm': 'THIS ALGORITHM IS NOT SUPPORTED',
-        'version': 1,
-    })
-
-    with pytest.raises(UnsupportedKeyFormatError):
-        key.decrypt_key_file(encrypted, "hello, pass phrase")
-
-
-def test_decrypt_key_file_v2_is_unsupported():
-    """There may eventually be a version 2 of the format. For now we should raise a helpful error."""
-    key = KeyfileKey(None)
-    encrypted = msgpack.packb({
-        'version': 2,
-    })
-
-    with pytest.raises(UnsupportedKeyFormatError):
-        key.decrypt_key_file(encrypted, "hello, pass phrase")
-
-
-@pytest.mark.parametrize('cli_argument, expected_algorithm', KEY_ALGORITHMS.items())
-def test_key_file_roundtrip(monkeypatch, cli_argument, expected_algorithm):
-    def to_dict(key):
-        extract = 'repository_id', 'enc_key', 'enc_hmac_key', 'id_key', 'chunk_seed'
-        return {a: getattr(key, a) for a in extract}
-
-    repository = MagicMock(id=b'repository_id')
-    monkeypatch.setenv('BORG_PASSPHRASE', "hello, pass phrase")
-
-    save_me = RepoKey.create(repository, args=MagicMock(key_algorithm=cli_argument))
-    saved = repository.save_key.call_args.args[0]
-    repository.load_key.return_value = saved
-    load_me = RepoKey.detect(repository, manifest_data=None)
-
-    assert to_dict(load_me) == to_dict(save_me)
-    assert msgpack.unpackb(a2b_base64(saved))[b'algorithm'] == expected_algorithm.encode()
-
-
 @unittest.mock.patch('getpass.getpass')
 def test_repo_key_detect_does_not_raise_integrity_error(getpass, monkeypatch):
     """https://github.com/borgbackup/borg/pull/6469#discussion_r832670411
diff --git a/src/borg/testsuite/key.py b/src/borg/testsuite/key.py
index 4c84756a6..e0be752fa 100644
--- a/src/borg/testsuite/key.py
+++ b/src/borg/testsuite/key.py
@@ -2,7 +2,8 @@ import getpass
 import os.path
 import re
 import tempfile
-from binascii import hexlify, unhexlify
+from binascii import hexlify, unhexlify, a2b_base64
+from unittest.mock import MagicMock
 
 import pytest
 
@@ -11,7 +12,7 @@ from ..crypto.key import PlaintextKey, AuthenticatedKey, RepoKey, KeyfileKey, \
     Blake2KeyfileKey, Blake2RepoKey, Blake2AuthenticatedKey, \
     AESOCBKeyfileKey, AESOCBRepoKey, CHPOKeyfileKey, CHPORepoKey
 from ..crypto.key import ID_HMAC_SHA_256, ID_BLAKE2b_256
-from ..crypto.key import TAMRequiredError, TAMInvalid, TAMUnsupportedSuiteError, UnsupportedManifestError
+from ..crypto.key import TAMRequiredError, TAMInvalid, TAMUnsupportedSuiteError, UnsupportedManifestError, UnsupportedKeyFormatError
 from ..crypto.key import identify_key
 from ..crypto.low_level import bytes_to_long
 from ..crypto.low_level import IntegrityError as IntegrityErrorBase
@@ -20,6 +21,7 @@ from ..helpers import Location
 from ..helpers import StableDict
 from ..helpers import get_security_dir
 from ..helpers import msgpack
+from ..constants import KEY_ALGORITHMS
 
 
 class TestKey:
@@ -379,3 +381,44 @@ class TestTAM:
 
         with pytest.raises(TAMInvalid):
             key.unpack_and_verify_manifest(blob)
+
+
+def test_decrypt_key_file_unsupported_algorithm():
+    """We will add more algorithms in the future. We should raise a helpful error."""
+    key = KeyfileKey(None)
+    encrypted = msgpack.packb({
+        'algorithm': 'THIS ALGORITHM IS NOT SUPPORTED',
+        'version': 1,
+    })
+
+    with pytest.raises(UnsupportedKeyFormatError):
+        key.decrypt_key_file(encrypted, "hello, pass phrase")
+
+
+def test_decrypt_key_file_v2_is_unsupported():
+    """There may eventually be a version 2 of the format. For now we should raise a helpful error."""
+    key = KeyfileKey(None)
+    encrypted = msgpack.packb({
+        'version': 2,
+    })
+
+    with pytest.raises(UnsupportedKeyFormatError):
+        key.decrypt_key_file(encrypted, "hello, pass phrase")
+
+
+@pytest.mark.parametrize('cli_argument, expected_algorithm', KEY_ALGORITHMS.items())
+def test_key_file_roundtrip(monkeypatch, cli_argument, expected_algorithm):
+    def to_dict(key):
+        extract = 'repository_id', 'enc_key', 'enc_hmac_key', 'id_key', 'chunk_seed'
+        return {a: getattr(key, a) for a in extract}
+
+    repository = MagicMock(id=b'repository_id')
+    monkeypatch.setenv('BORG_PASSPHRASE', "hello, pass phrase")
+
+    save_me = RepoKey.create(repository, args=MagicMock(key_algorithm=cli_argument))
+    saved = repository.save_key.call_args.args[0]
+    repository.load_key.return_value = saved
+    load_me = RepoKey.detect(repository, manifest_data=None)
+
+    assert to_dict(load_me) == to_dict(save_me)
+    assert msgpack.unpackb(a2b_base64(saved))[b'algorithm'] == expected_algorithm.encode()