diff --git a/python/bbgo/handlers/order.py b/python/bbgo/handlers/order.py
index ff2701786..ccebc934a 100644
--- a/python/bbgo/handlers/order.py
+++ b/python/bbgo/handlers/order.py
@@ -1,4 +1,3 @@
-from ..data import Event
 from ..data import UserDataEvent
 from ..enums import ChannelType
 from ..enums import EventType
diff --git a/python/pyproject.toml b/python/pyproject.toml
index 32b20dd4a..71e215997 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "bbgo"
-version = "0.1.6"
+version = "0.1.7"
 description = ""
 authors = ["なるみ <weaper@gmail.com>"]
 packages = [
diff --git a/python/tests/test_utils.py b/python/tests/test_utils.py
new file mode 100644
index 000000000..591bec147
--- /dev/null
+++ b/python/tests/test_utils.py
@@ -0,0 +1,18 @@
+from bbgo.utils import parse_float
+from bbgo.utils import parse_time
+
+
+def test_parse_time():
+    t = 1650610080000
+    d = parse_time(t)
+
+    assert d.timestamp() == t / 1000
+
+
+def test_parse_float():
+    assert parse_float(None) == 0
+    assert parse_float("") == 0
+
+    s = "3.14159265358979"
+    f = 3.14159265358979
+    assert parse_float(s) == f