diff --git a/freqtrade/rpc/api_server.py b/freqtrade/rpc/api_server.py
index 4ddda307a..c2d83d1fb 100644
--- a/freqtrade/rpc/api_server.py
+++ b/freqtrade/rpc/api_server.py
@@ -141,7 +141,7 @@ class ApiServer(RPC):
         rest_ip = self._config['api_server']['listen_ip_address']
         rest_port = self._config['api_server']['listen_port']
 
-        logger.info('Starting HTTP Server at {}:{}'.format(rest_ip, rest_port))
+        logger.info(f'Starting HTTP Server at {rest_ip}:{rest_port}')
         if not IPv4Address(rest_ip).is_loopback:
             logger.warning("SECURITY WARNING - Local Rest Server listening to external connections")
             logger.warning("SECURITY WARNING - This is insecure please set to your loopback,"
diff --git a/freqtrade/tests/rpc/test_rpc_apiserver.py b/freqtrade/tests/rpc/test_rpc_apiserver.py
index 95ad7dbc3..41d682d2d 100644
--- a/freqtrade/tests/rpc/test_rpc_apiserver.py
+++ b/freqtrade/tests/rpc/test_rpc_apiserver.py
@@ -8,10 +8,11 @@ from unittest.mock import ANY, MagicMock, PropertyMock
 import pytest
 
 from freqtrade.__init__ import __version__
+from freqtrade.persistence import Trade
 from freqtrade.rpc.api_server import ApiServer
 from freqtrade.state import State
-from freqtrade.tests.conftest import (get_patched_freqtradebot, patch_get_signal)
-from freqtrade.persistence import Trade
+from freqtrade.tests.conftest import (get_patched_freqtradebot, log_has,
+                                      patch_get_signal)
 
 
 @pytest.fixture
@@ -78,6 +79,49 @@ def test_api__init__(default_conf, mocker):
     assert apiserver._config == default_conf
 
 
+def test_api_run(default_conf, mocker, caplog):
+    default_conf.update({"api_server": {"enabled": True,
+                                        "listen_ip_address": "127.0.0.1",
+                                        "listen_port": "8080"}})
+    mocker.patch('freqtrade.rpc.telegram.Updater', MagicMock())
+    mocker.patch('freqtrade.rpc.api_server.threading.Thread', MagicMock())
+
+    apiserver = ApiServer(get_patched_freqtradebot(mocker, default_conf))
+
+    # Monkey patch flask app
+    run_mock = MagicMock()
+    apiserver.app = MagicMock()
+    apiserver.app.run = run_mock
+
+    assert apiserver._config == default_conf
+    apiserver.run()
+    assert run_mock.call_count == 1
+    assert run_mock.call_args_list[0][1]["host"] == "127.0.0.1"
+    assert run_mock.call_args_list[0][1]["port"] == "8080"
+
+    assert log_has("Starting HTTP Server at 127.0.0.1:8080", caplog.record_tuples)
+    assert log_has("Starting Local Rest Server", caplog.record_tuples)
+
+    # Test binding to public
+    caplog.clear()
+    run_mock.reset_mock()
+    apiserver._config.update({"api_server": {"enabled": True,
+                                             "listen_ip_address": "0.0.0.0",
+                                             "listen_port": "8089"}})
+    apiserver.run()
+
+    assert run_mock.call_count == 1
+    assert run_mock.call_args_list[0][1]["host"] == "0.0.0.0"
+    assert run_mock.call_args_list[0][1]["port"] == "8089"
+    assert log_has("Starting HTTP Server at 0.0.0.0:8089", caplog.record_tuples)
+    assert log_has("Starting Local Rest Server", caplog.record_tuples)
+    assert log_has("SECURITY WARNING - Local Rest Server listening to external connections",
+                   caplog.record_tuples)
+    assert log_has("SECURITY WARNING - This is insecure please set to your loopback,"
+                   "e.g 127.0.0.1 in config.json",
+                   caplog.record_tuples)
+
+
 def test_api_reloadconf(botclient):
     ftbot, client = botclient
 
@@ -353,4 +397,3 @@ def test_api_whitelist(botclient, mocker, ticker, fee, markets):
     assert rc.json == {"whitelist": ['ETH/BTC', 'LTC/BTC', 'XRP/BTC', 'NEO/BTC'],
                        "length": 4,
                        "method": "StaticPairList"}
-