diff --git a/freqtrade/constants.py b/freqtrade/constants.py
index 3802ec3ad..7012acb7c 100644
--- a/freqtrade/constants.py
+++ b/freqtrade/constants.py
@@ -148,7 +148,6 @@ CONF_SCHEMA = {
             'patternProperties': {
                 '^[0-9.]+$': {'type': 'number'}
             },
-            'minProperties': 1
         },
         'amount_reserve_percent': {'type': 'number', 'minimum': 0.0, 'maximum': 0.5},
         'stoploss': {'type': 'number', 'maximum': 0, 'exclusiveMaximum': True, 'minimum': -1},
diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 382f38c9a..ae8070b2d 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -48,7 +48,7 @@ class IStrategy(ABC, HyperStrategyMixin):
 
     _ft_params_from_file: Dict
     # associated minimal roi
-    minimal_roi: Dict = {"0": 10.0}
+    minimal_roi: Dict = {}
 
     # associated stoploss
     stoploss: float
diff --git a/tests/optimize/test_backtest_detail.py b/tests/optimize/test_backtest_detail.py
index 158dd04dc..82c036e07 100644
--- a/tests/optimize/test_backtest_detail.py
+++ b/tests/optimize/test_backtest_detail.py
@@ -820,7 +820,7 @@ tc52 = BTContainer(data=[
     [2, 4900, 5250, 4500, 5100, 6172, 0, 0],  # Order readjust
     [3, 5100, 5100, 4650, 4750, 6172, 0, 0],  # stoploss hit?
     [4, 4750, 4950, 4350, 4750, 6172, 0, 0]],
-    stop_loss=-0.03, roi={"0": 0.10}, profit_perc=-0.03,
+    stop_loss=-0.03, roi={}, profit_perc=-0.03,
     use_exit_signal=True, timeout=1000,
     custom_entry_price=4200, adjust_entry_price=5200,
     trades=[BTrade(exit_reason=ExitType.STOP_LOSS, open_tick=1, close_tick=2, is_short=False)]