diff --git a/freqtrade/commands/arguments.py b/freqtrade/commands/arguments.py
index 1efe450ff..1143db394 100644
--- a/freqtrade/commands/arguments.py
+++ b/freqtrade/commands/arguments.py
@@ -390,6 +390,6 @@ class Arguments:
 
         # Add webserver subcommand
         webserver_cmd = subparsers.add_parser('webserver', help='Webserver module.',
-                                              parents=[_common_parser, _strategy_parser])
+                                              parents=[_common_parser])
         webserver_cmd.set_defaults(func=start_webserver)
         self._build_args(optionlist=ARGS_WEBSERVER, parser=webserver_cmd)
diff --git a/freqtrade/rpc/api_server/api_backtest.py b/freqtrade/rpc/api_server/api_backtest.py
index 8bf87a044..76b4a8169 100644
--- a/freqtrade/rpc/api_server/api_backtest.py
+++ b/freqtrade/rpc/api_server/api_backtest.py
@@ -40,35 +40,39 @@ async def api_start_backtest(bt_settings: BacktestRequest, background_tasks: Bac
         asyncio.set_event_loop(asyncio.new_event_loop())
         try:
             # Reload strategy
-            lastconfig = ApiServer._lastbacktestconfig
+            lastconfig = ApiServer._bt_last_config
             strat = StrategyResolver.load_strategy(btconfig)
 
-            if (not ApiServer._bt
-                    or lastconfig.get('timeframe') != strat.timeframe
-                    or lastconfig.get('dry_run_wallet') != btconfig.get('dry_run_wallet', 0)):
+            if (
+                not ApiServer._bt
+                or lastconfig.get('timeframe') != strat.timeframe
+                or lastconfig.get('dry_run_wallet') != btconfig.get('dry_run_wallet', 0)
+            ):
                 from freqtrade.optimize.backtesting import Backtesting
                 ApiServer._bt = Backtesting(btconfig)
 
             # Only reload data if timeframe or timerange changed.
-            if (not ApiServer._backtestdata or not ApiServer._bt_timerange
-                    or lastconfig.get('timerange') != btconfig['timerange']
-                    or lastconfig.get('stake_amount') != btconfig.get('stake_amount')
-                    or lastconfig.get('enable_protections') != btconfig.get('enable_protections')
-                    or lastconfig.get('protections') != btconfig.get('protections', [])
-                    or lastconfig.get('timeframe') != strat.timeframe):
+            if (
+                not ApiServer._bt_data
+                or not ApiServer._bt_timerange
+                or lastconfig.get('timerange') != btconfig['timerange']
+                or lastconfig.get('stake_amount') != btconfig.get('stake_amount')
+                or lastconfig.get('enable_protections') != btconfig.get('enable_protections')
+                or lastconfig.get('protections') != btconfig.get('protections', [])
+                or lastconfig.get('timeframe') != strat.timeframe
+            ):
                 lastconfig['timerange'] = btconfig['timerange']
                 lastconfig['protections'] = btconfig.get('protections', [])
                 lastconfig['enable_protections'] = btconfig.get('enable_protections')
                 lastconfig['dry_run_wallet'] = btconfig.get('dry_run_wallet')
                 lastconfig['timeframe'] = strat.timeframe
-                ApiServer._backtestdata, ApiServer._bt_timerange = ApiServer._bt.load_bt_data()
+                ApiServer._bt_data, ApiServer._bt_timerange = ApiServer._bt.load_bt_data()
 
             ApiServer._bt.abort = False
             min_date, max_date = ApiServer._bt.backtest_one_strategy(
-                strat, ApiServer._backtestdata,
-                ApiServer._bt_timerange)
+                strat, ApiServer._bt_data, ApiServer._bt_timerange)
             ApiServer._bt.results = generate_backtest_stats(
-                ApiServer._backtestdata, ApiServer._bt.all_results,
+                ApiServer._bt_data, ApiServer._bt.all_results,
                 min_date=min_date, max_date=max_date)
             logger.info("Backtest finished.")
 
@@ -140,8 +144,8 @@ def api_delete_backtest():
     if ApiServer._bt:
         del ApiServer._bt
         ApiServer._bt = None
-        del ApiServer._backtestdata
-        ApiServer._backtestdata = None
+        del ApiServer._bt_data
+        ApiServer._bt_data = None
         logger.info("Backtesting reset")
     return {
         "status": "reset",
diff --git a/freqtrade/rpc/api_server/webserver.py b/freqtrade/rpc/api_server/webserver.py
index e9becc936..235063191 100644
--- a/freqtrade/rpc/api_server/webserver.py
+++ b/freqtrade/rpc/api_server/webserver.py
@@ -35,9 +35,9 @@ class ApiServer(RPCHandler):
     _rpc: RPC
     # Backtesting type: Backtesting
     _bt = None
-    _backtestdata = None
+    _bt_data = None
     _bt_timerange = None
-    _lastbacktestconfig: Dict[str, Any] = {}
+    _bt_last_config: Dict[str, Any] = {}
     _has_rpc: bool = False
     _bgtask_running: bool = False
     _config: Dict[str, Any] = {}