diff --git a/tests/crypto/test_keyring.py b/tests/crypto/test_keyring.py

index 0e8af2da54..1b9696748f 100644
--- a/tests/crypto/test_keyring.py
+++ b/tests/crypto/test_keyring.py
@@ -192,7 +192,7 @@ class KeyringTestCase(unittest.HomeserverTestCase):
         key1 = signedjson.key.generate_signing_key("1")
         r = self.hs.get_datastores().main.store_server_verify_keys(
             "server9",
-            time.time() * 1000,
+            int(time.time() * 1000),
             [("server9", get_key_id(key1), FetchKeyResult(get_verify_key(key1), 1000))],
         )
         self.get_success(r)
@@ -287,7 +287,7 @@ class KeyringTestCase(unittest.HomeserverTestCase):
         key1 = signedjson.key.generate_signing_key("1")
         r = self.hs.get_datastores().main.store_server_verify_keys(
             "server9",
-            time.time() * 1000,
+            int(time.time() * 1000),
             # None is not a valid value in FetchKeyResult, but we're abusing this
             # API to insert null values into the database. The nulls get converted
             # to 0 when fetched in KeyStore.get_server_verify_keys.
@@ -466,9 +466,9 @@ class ServerKeyFetcherTestCase(unittest.HomeserverTestCase):
         key_json = self.get_success(
             self.hs.get_datastores().main.get_server_keys_json([lookup_triplet])
         )
-        res = key_json[lookup_triplet]
-        self.assertEqual(len(res), 1)
-        res = res[0]
+        res_keys = key_json[lookup_triplet]
+        self.assertEqual(len(res_keys), 1)
+        res = res_keys[0]
         self.assertEqual(res["key_id"], testverifykey_id)
         self.assertEqual(res["from_server"], SERVER_NAME)
         self.assertEqual(res["ts_added_ms"], self.reactor.seconds() * 1000)
@@ -584,9 +584,9 @@ class PerspectivesKeyFetcherTestCase(unittest.HomeserverTestCase):
         key_json = self.get_success(
             self.hs.get_datastores().main.get_server_keys_json([lookup_triplet])
         )
-        res = key_json[lookup_triplet]
-        self.assertEqual(len(res), 1)
-        res = res[0]
+        res_keys = key_json[lookup_triplet]
+        self.assertEqual(len(res_keys), 1)
+        res = res_keys[0]
         self.assertEqual(res["key_id"], testverifykey_id)
         self.assertEqual(res["from_server"], self.mock_perspective_server.server_name)
         self.assertEqual(res["ts_added_ms"], self.reactor.seconds() * 1000)
@@ -705,9 +705,9 @@ class PerspectivesKeyFetcherTestCase(unittest.HomeserverTestCase):
         key_json = self.get_success(
             self.hs.get_datastores().main.get_server_keys_json([lookup_triplet])
         )
-        res = key_json[lookup_triplet]
-        self.assertEqual(len(res), 1)
-        res = res[0]
+        res_keys = key_json[lookup_triplet]
+        self.assertEqual(len(res_keys), 1)
+        res = res_keys[0]
         self.assertEqual(res["key_id"], testverifykey_id)
         self.assertEqual(res["from_server"], self.mock_perspective_server.server_name)
         self.assertEqual(res["ts_added_ms"], self.reactor.seconds() * 1000)