diff --git a/requirements-db.txt b/requirements-db.txt
--- a/requirements-db.txt
+++ b/requirements-db.txt
@@ -1,2 +1,3 @@
 # requirements for swh.core.db
 psycopg2
+typing-extensions
diff --git a/requirements-test-db.txt b/requirements-test-db.txt
--- a/requirements-test-db.txt
+++ b/requirements-test-db.txt
@@ -1,2 +1 @@
 pytest-postgresql
-typing-extensions
diff --git a/swh/core/api/tests/test_serializers.py b/swh/core/api/tests/test_serializers.py
--- a/swh/core/api/tests/test_serializers.py
+++ b/swh/core/api/tests/test_serializers.py
@@ -178,7 +178,7 @@
 
     def test_encode_native_datetime(self):
         dt = datetime.datetime(2015, 1, 1, 12, 4, 42, 231455)
-        with self.assertRaises(ValueError, matches="naive datetime"):
+        with self.assertRaises(ValueError, match="naive datetime"):
             msgpack_dumps(dt)
 
     def test_decode_naive_datetime(self):