diff --git a/.travis.yml b/.travis.yml
index 41e4f902..fa0ffea0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,12 @@
 language: python
 python:
-  - "3.7"
+  - "3.7-dev"
 install:
   - pip install -r requirements.txt
-  - pip install -r requirements-travis.txt
+  - pip install -r travis/requirements.txt
   - pip install -r requirements-dev.txt
 # command to run tests
 script:
-  - yapf --style .style.yapf
+  - python travis/format_check.py
   - pylint --rcfile=.pylintrc vnpy
   - python tests/test_all.py
diff --git a/requirements-travis.txt b/travis/requirements-travis.txt
similarity index 100%
rename from requirements-travis.txt
rename to travis/requirements-travis.txt