diff --git a/freqtrade/tests/test_misc.py b/freqtrade/tests/test_misc.py
index 91c34b620..dee683060 100644
--- a/freqtrade/tests/test_misc.py
+++ b/freqtrade/tests/test_misc.py
@@ -9,7 +9,7 @@ from unittest.mock import MagicMock
 
 from freqtrade.analyze import Analyze
 from freqtrade.misc import (shorten_date, datesarray_to_datetimearray,
-                            common_datearray, file_dump_json)
+                            common_datearray, file_dump_json, format_ms_time)
 from freqtrade.optimize.__init__ import load_tickerdata_file
 
 
@@ -76,3 +76,14 @@ def test_file_dump_json(mocker) -> None:
     file_dump_json('somefile', [1, 2, 3], True)
     assert file_open.call_count == 1
     assert json_dump.call_count == 1
+
+
+def test_format_ms_time() -> None:
+    """
+    test format_ms_time()
+    :return: None
+    """
+    date = format_ms_time(1523383321000)
+    assert type(date) is str
+    assert date == '2018-04-10T20:02:01'
+    assert format_ms_time(1513152121000) == '2017-12-13T09:02:01'