diff --git a/CHANGES.rst b/CHANGES.rst
index abd215b26..8afb72189 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -41,6 +41,7 @@ fixes:
 - chore: update repos.json (#1660)
 - docs: add readthedocs yaml config (#1661)
 - fix: broken integration tests (#1668)
+- style: replace format() with f-strings (#1667)
 
 
 v6.1.9 (2022-06-11)
diff --git a/docs/user_guide/plugin_development/webhooks.rst b/docs/user_guide/plugin_development/webhooks.rst
index 34b47cd06..3777d83b2 100644
--- a/docs/user_guide/plugin_development/webhooks.rst
+++ b/docs/user_guide/plugin_development/webhooks.rst
@@ -115,7 +115,7 @@ which contains all the details about the actual request:
         @webhook(raw=True)
         def test(self, request):
             user_agent = request.headers.get("user-agent", "Unknown")
-            return "Your user-agent is {}".format(user_agent)
+            return f"Your user-agent is {user_agent}"
 
 
 Returning custom headers and status codes
diff --git a/errbot/botplugin.py b/errbot/botplugin.py
index dcdeffc79..79b50b009 100644
--- a/errbot/botplugin.py
+++ b/errbot/botplugin.py
@@ -134,9 +134,7 @@ def append_args(self, args, kwargs):
             update_wrapper(self.definition, args, kwargs)
         else:
             log.warning(
-                "Attempting to append arguments to {} isn't supported.".format(
-                    self.definition
-                )
+                f"Attempting to append arguments to {self.definition} isn't supported."
             )
 
 
diff --git a/errbot/core_plugins/vcheck.py b/errbot/core_plugins/vcheck.py
index 2a536111f..ef0f2c0a0 100644
--- a/errbot/core_plugins/vcheck.py
+++ b/errbot/core_plugins/vcheck.py
@@ -47,9 +47,7 @@ def _get_version(self):
         # noinspection PyBroadException
         try:
             possible_versions = requests.get(HOME).json()
-            version = possible_versions.get(
-                "python{}".format(major_py_version), VERSION
-            )
+            version = possible_versions.get(f"python{major_py_version}", VERSION)
             self.log.debug("Latest Errbot version is: %s", version)
         except (HTTPError, URLError, ConnectionError, JSONDecodeError):
             self.log.info("Could not establish connection to retrieve latest version.")
diff --git a/tests/base_backend_test.py b/tests/base_backend_test.py
index dadc6114b..5406356dc 100644
--- a/tests/base_backend_test.py
+++ b/tests/base_backend_test.py
@@ -1003,9 +1003,9 @@ def test_access_controls(dummy_backend):
         dummy_backend.bot_config.ACCESS_CONTROLS = test.get("acl", {})
         dummy_backend.bot_config.BOT_ADMINS = test.get("bot_admins", ())
         logger = logging.getLogger(__name__)
-        logger.info("** message: {}".format(test["message"].body))
-        logger.info("** bot_admins: {}".format(dummy_backend.bot_config.BOT_ADMINS))
-        logger.info("** acl: {!r}".format(dummy_backend.bot_config.ACCESS_CONTROLS))
+        logger.info(f"** message: {test['message'].body}")
+        logger.info(f"** bot_admins: {dummy_backend.bot_config.BOT_ADMINS}")
+        logger.info(f"** acl: {dummy_backend.bot_config.ACCESS_CONTROLS}")
         logger.info(
             "** acl_default: {!r}".format(
                 dummy_backend.bot_config.ACCESS_CONTROLS_DEFAULT
diff --git a/tests/commandnotfound_plugin/commandnotfound.py b/tests/commandnotfound_plugin/commandnotfound.py
index 3fe7e1158..4a2485794 100644
--- a/tests/commandnotfound_plugin/commandnotfound.py
+++ b/tests/commandnotfound_plugin/commandnotfound.py
@@ -7,4 +7,4 @@ def command_not_found(self, msg, cmd, args, dry_run, emptycmd=False):
         if not emptycmd:
             return msg, cmd, args
 
-        return "Command fell through: {}".format(msg)
+        return f"Command fell through: {msg}"
diff --git a/tests/commands_test.py b/tests/commands_test.py
index 397596e31..8d33df577 100644
--- a/tests/commands_test.py
+++ b/tests/commands_test.py
@@ -112,9 +112,7 @@ def test_plugin_cycle(testbot):
     ]
 
     for plugin in plugins:
-        testbot.assertInCommand(
-            "!repos install {0}".format(plugin), "Installing {0}...".format(plugin)
-        ),
+        testbot.assertInCommand(f"!repos install {plugin}", f"Installing {plugin}..."),
         assert (
             "A new plugin repository has been installed correctly from errbotio/err-helloworld"
             in testbot.pop_message(timeout=60)
@@ -231,7 +229,7 @@ def test_webserver_webhook_test(testbot):
 
 def test_activate_reload_and_deactivate(testbot):
     for command in ("activate", "reload", "deactivate"):
-        testbot.push_message("!plugin {}".format(command))
+        testbot.push_message(f"!plugin {command}")
         m = testbot.pop_message()
         assert "Please tell me which of the following plugins to" in m
         assert "ChatRoom" in m
@@ -350,7 +348,7 @@ def test_callback_no_command(testbot):
     )
 
     cmd = "!this_is_not_a_real_command_at_all"
-    expected_str = "Command fell through: {}".format(cmd)
+    expected_str = f"Command fell through: {cmd}"
 
     testbot.exec_command("!plugin deactivate CommandNotFoundFilter")
     testbot.bot.plugin_manager._extra_plugin_dir = extra_plugin_dir
diff --git a/tests/room_plugin/roomtest.py b/tests/room_plugin/roomtest.py
index 4571624df..fbf87b482 100644
--- a/tests/room_plugin/roomtest.py
+++ b/tests/room_plugin/roomtest.py
@@ -13,13 +13,13 @@ def activate(self):
 
     def callback_room_joined(self, room, user, invited_by):
         log.info("join")
-        self.events.put("callback_room_joined {!s}".format(room))
+        self.events.put(f"callback_room_joined {room}")
 
     def callback_room_left(self, room, user, kicked_by):
-        self.events.put("callback_room_left {!s}".format(room))
+        self.events.put(f"callback_room_left {room}")
 
     def callback_room_topic(self, room):
-        self.events.put("callback_room_topic {}".format(room.topic))
+        self.events.put(f"callback_room_topic {room.topic}")
 
     def purge(self):
         log.info("purge")