diff --git a/server/gameconnection.py b/server/gameconnection.py
index 14d11baa0..66af0db86 100644
--- a/server/gameconnection.py
+++ b/server/gameconnection.py
@@ -600,7 +600,7 @@ async def on_connection_lost(self):
             await self.abort()
 
     def __str__(self):
-        return "GameConnection({}, {})".format(self.player, self.game)
+        return f"GameConnection({self.player}, {self.game})"
 
 
 COMMAND_HANDLERS = {
diff --git a/server/games/game.py b/server/games/game.py
index c34651916..c9cb8126b 100644
--- a/server/games/game.py
+++ b/server/games/game.py
@@ -82,7 +82,7 @@ def __init__(
         self.launched_at = None
         self.ended = False
         self._logger = logging.getLogger(
-            "{}.{}".format(self.__class__.__qualname__, id_)
+            f"{self.__class__.__qualname__}.{id_}"
         )
         self.id = id_
         self.visibility = VisibilityState.PUBLIC
diff --git a/server/lobbyconnection.py b/server/lobbyconnection.py
index f0f7cbef7..325556300 100644
--- a/server/lobbyconnection.py
+++ b/server/lobbyconnection.py
@@ -136,7 +136,7 @@ async def ensure_authenticated(self, cmd):
                 "pong",
             ):
                 metrics.unauth_messages.labels(cmd).inc()
-                await self.abort("Message invalid for unauthenticated connection: %s" % cmd)
+                await self.abort(f"Message invalid for unauthenticated connection: {cmd}")
                 return False
         return True
 
@@ -162,7 +162,7 @@ async def on_message_received(self, message):
                 self._attempted_connectivity_test = True
                 raise ClientError("Your client version is no longer supported. Please update to the newest version: https://faforever.com")
 
-            handler = getattr(self, "command_{}".format(cmd))
+            handler = getattr(self, f"command_{cmd}")
             await handler(message)
 
         except AuthenticationError as ex:
@@ -189,7 +189,7 @@ async def on_message_received(self, message):
                 await self.abort(ex.message)
         except (KeyError, ValueError) as ex:
             self._logger.exception(ex)
-            await self.abort("Garbage command: {}".format(message))
+            await self.abort(f"Garbage command: {message}")
         except ConnectionError as e:
             # Propagate connection errors to the ServerContext error handler.
             raise e
@@ -513,7 +513,7 @@ async def check_policy_conformity(self, player_id, uid_hash, session, ignore_res
                         )
                     )
                 except pymysql.MySQLError as e:
-                    raise ClientError("Banning failed: {}".format(e))
+                    raise ClientError(f"Banning failed: {e}")
 
             return False
 
@@ -1062,7 +1062,7 @@ async def command_modvault(self, message):
                                    ui=ui)
                         await self.send(out)
                     except:
-                        self._logger.error("Error handling table_mod row (uid: {})".format(uid), exc_info=True)
+                        self._logger.error(f"Error handling table_mod row (uid: {uid})", exc_info=True)
 
             elif type == "like":
                 canLike = True
diff --git a/server/matchmaker/search.py b/server/matchmaker/search.py
index ce6da04fb..124967953 100644
--- a/server/matchmaker/search.py
+++ b/server/matchmaker/search.py
@@ -339,7 +339,7 @@ def cancel(self):
             s.cancel()
 
     def __str__(self):
-        return "CombinedSearch({})".format(",".join(str(s) for s in self.searches))
+        return f"CombinedSearch({','.join(str(s) for s in self.searches)})"
 
     def get_original_searches(self) -> List[Search]:
         """
diff --git a/server/servercontext.py b/server/servercontext.py
index 0c32fed37..cda19c65a 100644
--- a/server/servercontext.py
+++ b/server/servercontext.py
@@ -37,7 +37,7 @@ def __init__(
         self.protocol_class = protocol_class
 
     def __repr__(self):
-        return "ServerContext({})".format(self.name)
+        return f"ServerContext({self.name})"
 
     async def listen(self, host, port):
         self._logger.debug("%s: listen(%s, %s)", self.name, host, port)
diff --git a/tests/integration_tests/conftest.py b/tests/integration_tests/conftest.py
index 3e7beea17..34e31a0ad 100644
--- a/tests/integration_tests/conftest.py
+++ b/tests/integration_tests/conftest.py
@@ -375,11 +375,7 @@ async def connect_and_sign_in(
 @pytest.fixture
 async def channel():
     connection = await aio_pika.connect(
-        "amqp://{user}:{password}@localhost/{vhost}".format(
-            user=config.MQ_USER,
-            password=config.MQ_PASSWORD,
-            vhost=config.MQ_VHOST
-        )
+        f"amqp://{config.MQ_USER}:{config.MQ_PASSWORD}@localhost/{config.MQ_VHOST}"
     )
     channel = await connection.channel()
 
diff --git a/tests/integration_tests/test_message_queue_service.py b/tests/integration_tests/test_message_queue_service.py
index 5eef0cd75..208d2af4f 100644
--- a/tests/integration_tests/test_message_queue_service.py
+++ b/tests/integration_tests/test_message_queue_service.py
@@ -18,9 +18,7 @@ def __init__(self):
 
     async def initialize(self):
         self.connection = await aio_pika.connect(
-            "amqp://{user}:{password}@localhost/{vhost}".format(
-                user=config.MQ_USER, password=config.MQ_PASSWORD, vhost=config.MQ_VHOST
-            )
+            f"amqp://{config.MQ_USER}:{config.MQ_PASSWORD}@localhost/{config.MQ_VHOST}"
         )
         channel = await self.connection.channel()
         exchange = await channel.declare_exchange(
diff --git a/tests/unit_tests/test_game.py b/tests/unit_tests/test_game.py
index 080104d7e..ac0fac93d 100644
--- a/tests/unit_tests/test_game.py
+++ b/tests/unit_tests/test_game.py
@@ -62,7 +62,7 @@ async def test_initialization(game: Game):
 
 
 async def test_instance_logging(database, game_stats_service):
-    logger = logging.getLogger("{}.5".format(Game.__qualname__))
+    logger = logging.getLogger(f"{Game.__qualname__}.5")
     logger.debug = mock.Mock()
     mock_parent = mock.Mock()
     game = Game(5, database, mock_parent, game_stats_service)