diff --git a/freqtrade/commands/analyze_commands.py b/freqtrade/commands/analyze_commands.py
index 20afa7ffd..e928ccad7 100644
--- a/freqtrade/commands/analyze_commands.py
+++ b/freqtrade/commands/analyze_commands.py
@@ -40,8 +40,8 @@ def setup_analyze_configuration(args: Dict[str, Any], method: RunMode) -> Dict[s
 
         if (not Path(signals_file).exists()):
             raise OperationalException(
-                (f"Cannot find latest backtest signals file: {signals_file}."
-                  "Run backtesting with `--export signals`.")
+                f"Cannot find latest backtest signals file: {signals_file}."
+                "Run backtesting with `--export signals`."
             )
 
     return config
diff --git a/freqtrade/optimize/hyperopt_tools.py b/freqtrade/optimize/hyperopt_tools.py
index cf0650f7d..93efbf644 100644
--- a/freqtrade/optimize/hyperopt_tools.py
+++ b/freqtrade/optimize/hyperopt_tools.py
@@ -1,4 +1,3 @@
-import io
 import logging
 from copy import deepcopy
 from datetime import datetime, timezone
@@ -464,7 +463,7 @@ class HyperoptTools():
             return
 
         try:
-            io.open(csv_file, 'w+').close()
+            Path(csv_file).open('w+').close()
         except IOError:
             logger.error(f"Failed to create CSV file: {csv_file}")
             return
diff --git a/freqtrade/rpc/telegram.py b/freqtrade/rpc/telegram.py
index 0c0b24f00..cb219eef1 100644
--- a/freqtrade/rpc/telegram.py
+++ b/freqtrade/rpc/telegram.py
@@ -1340,7 +1340,7 @@ class Telegram(RPCHandler):
         message = tabulate({k: [v] for k, v in counts.items()},
                            headers=['current', 'max', 'total stake'],
                            tablefmt='simple')
-        message = "<pre>{}</pre>".format(message)
+        message = f"<pre>{message}</pre>"
         logger.debug(message)
         self._send_msg(message, parse_mode=ParseMode.HTML,
                        reload_able=True, callback_path="update_count",
@@ -1642,7 +1642,7 @@ class Telegram(RPCHandler):
             ])
         else:
             reply_markup = InlineKeyboardMarkup([[]])
-        msg += "\nUpdated: {}".format(datetime.now().ctime())
+        msg += f"\nUpdated: {datetime.now().ctime()}"
         if not query.message:
             return
         chat_id = query.message.chat_id
diff --git a/freqtrade/rpc/webhook.py b/freqtrade/rpc/webhook.py
index 0967de70d..118ebed88 100644
--- a/freqtrade/rpc/webhook.py
+++ b/freqtrade/rpc/webhook.py
@@ -113,7 +113,7 @@ class Webhook(RPCHandler):
                     response = post(self._url, data=payload['data'],
                                     headers={'Content-Type': 'text/plain'})
                 else:
-                    raise NotImplementedError('Unknown format: {}'.format(self._format))
+                    raise NotImplementedError(f'Unknown format: {self._format}')
 
                 # Throw a RequestException if the post was not successful
                 response.raise_for_status()
diff --git a/tests/data/test_btanalysis.py b/tests/data/test_btanalysis.py
index 345e3c299..2c5515f7c 100644
--- a/tests/data/test_btanalysis.py
+++ b/tests/data/test_btanalysis.py
@@ -98,7 +98,7 @@ def test_load_backtest_data_new_format(testdatadir):
     assert bt_data.equals(bt_data3)
 
     with pytest.raises(ValueError, match=r"File .* does not exist\."):
-        load_backtest_data(str("filename") + "nofile")
+        load_backtest_data("filename" + "nofile")
 
     with pytest.raises(ValueError, match=r"Unknown dataformat."):
         load_backtest_data(testdatadir / "backtest_results" / LAST_BT_RESULT_FN)
diff --git a/tests/data/test_history.py b/tests/data/test_history.py
index c967f0c89..24ad8bcc9 100644
--- a/tests/data/test_history.py
+++ b/tests/data/test_history.py
@@ -409,7 +409,7 @@ def test_init_with_refresh(default_conf, mocker) -> None:
 
 
 def test_file_dump_json_tofile(testdatadir) -> None:
-    file = testdatadir / 'test_{id}.json'.format(id=str(uuid.uuid4()))
+    file = testdatadir / f'test_{uuid.uuid4()}.json'
     data = {'bar': 'foo'}
 
     # check the file we will create does not exist
diff --git a/tests/optimize/test_optimize_reports.py b/tests/optimize/test_optimize_reports.py
index f71e6c492..0cc32baaf 100644
--- a/tests/optimize/test_optimize_reports.py
+++ b/tests/optimize/test_optimize_reports.py
@@ -236,7 +236,7 @@ def test_store_backtest_candles(testdatadir, mocker):
 
     assert dump_mock.call_count == 1
     assert isinstance(dump_mock.call_args_list[0][0][0], Path)
-    assert str(dump_mock.call_args_list[0][0][0]).endswith(str('_signals.pkl'))
+    assert str(dump_mock.call_args_list[0][0][0]).endswith('_signals.pkl')
 
     dump_mock.reset_mock()
     # mock file exporting
@@ -245,7 +245,7 @@ def test_store_backtest_candles(testdatadir, mocker):
     assert dump_mock.call_count == 1
     assert isinstance(dump_mock.call_args_list[0][0][0], Path)
     # result will be testdatadir / testresult-<timestamp>_signals.pkl
-    assert str(dump_mock.call_args_list[0][0][0]).endswith(str('_signals.pkl'))
+    assert str(dump_mock.call_args_list[0][0][0]).endswith('_signals.pkl')
     dump_mock.reset_mock()
 
 
diff --git a/tests/rpc/test_rpc_telegram.py b/tests/rpc/test_rpc_telegram.py
index b1859f581..7dabe9dfe 100644
--- a/tests/rpc/test_rpc_telegram.py
+++ b/tests/rpc/test_rpc_telegram.py
@@ -652,7 +652,7 @@ def test_monthly_handle(default_conf_usdt, update, ticker, fee, mocker, time_mac
 
     # The one-digit months should contain a zero, Eg: September 2021 = "2021-09"
     # Since we loaded the last 12 months, any month should appear
-    assert str('-09') in msg_mock.call_args_list[0][0][0]
+    assert '-09' in msg_mock.call_args_list[0][0][0]
 
     # Try invalid data
     msg_mock.reset_mock()
@@ -671,7 +671,7 @@ def test_monthly_handle(default_conf_usdt, update, ticker, fee, mocker, time_mac
     context = MagicMock()
     context.args = ["february"]
     telegram._monthly(update=update, context=context)
-    assert str('Monthly Profit over the last 6 months</b>:') in msg_mock.call_args_list[0][0][0]
+    assert 'Monthly Profit over the last 6 months</b>:' in msg_mock.call_args_list[0][0][0]
 
 
 def test_profit_handle(default_conf_usdt, update, ticker_usdt, ticker_sell_up, fee,
@@ -1730,14 +1730,14 @@ def test_version_handle(default_conf, update, mocker) -> None:
 
     telegram._version(update=update, context=MagicMock())
     assert msg_mock.call_count == 1
-    assert '*Version:* `{}`'.format(__version__) in msg_mock.call_args_list[0][0][0]
+    assert f'*Version:* `{__version__}`' in msg_mock.call_args_list[0][0][0]
 
     msg_mock.reset_mock()
     freqtradebot.strategy.version = lambda: '1.1.1'
 
     telegram._version(update=update, context=MagicMock())
     assert msg_mock.call_count == 1
-    assert '*Version:* `{}`'.format(__version__) in msg_mock.call_args_list[0][0][0]
+    assert f'*Version:* `{__version__}`' in msg_mock.call_args_list[0][0][0]
     assert '*Strategy version: * `1.1.1`' in msg_mock.call_args_list[0][0][0]
 
 
diff --git a/tests/strategy/test_strategy_loading.py b/tests/strategy/test_strategy_loading.py
index 98185e152..4cdb35936 100644
--- a/tests/strategy/test_strategy_loading.py
+++ b/tests/strategy/test_strategy_loading.py
@@ -69,7 +69,7 @@ def test_load_strategy(default_conf, dataframe_1m):
 def test_load_strategy_base64(dataframe_1m, caplog, default_conf):
     filepath = Path(__file__).parents[2] / 'freqtrade/templates/sample_strategy.py'
     encoded_string = urlsafe_b64encode(filepath.read_bytes()).decode("utf-8")
-    default_conf.update({'strategy': 'SampleStrategy:{}'.format(encoded_string)})
+    default_conf.update({'strategy': f'SampleStrategy:{encoded_string}'})
 
     strategy = StrategyResolver.load_strategy(default_conf)
     assert 'rsi' in strategy.advise_indicators(dataframe_1m, {'pair': 'ETH/BTC'})