diff --git a/freqtrade/freqtradebot.py b/freqtrade/freqtradebot.py
index 30eebb962..a3f5605b3 100644
--- a/freqtrade/freqtradebot.py
+++ b/freqtrade/freqtradebot.py
@@ -54,8 +54,11 @@ class FreqtradeBot:
         # Init objects
         self.config = config
 
-        self._sell_rate_cache = TTLCache(maxsize=100, ttl=5)
-        self._buy_rate_cache = TTLCache(maxsize=100, ttl=5)
+        # Cache values for 1800 to avoid frequent polling of the exchange for prices
+        # Caching only applies to RPC methods, so prices for open trades are still
+        # refreshed once every iteration.
+        self._sell_rate_cache = TTLCache(maxsize=100, ttl=1800)
+        self._buy_rate_cache = TTLCache(maxsize=100, ttl=1800)
 
         self.strategy: IStrategy = StrategyResolver.load_strategy(self.config)
 
diff --git a/tests/conftest.py b/tests/conftest.py
index d95475b8c..5c2e3e8e9 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -304,7 +304,8 @@ def default_conf(testdatadir):
         "user_data_dir": Path("user_data"),
         "verbosity": 3,
         "strategy_path": str(Path(__file__).parent / "strategy" / "strats"),
-        "strategy": "DefaultStrategy"
+        "strategy": "DefaultStrategy",
+        "internals": {},
     }
     return configuration