debugg:travis ci build version conflict
@@ -27,7 +27,7 @@ before_install:
- pip3 install --upgrade pip
- pip3 install -r requirements.txt
# - pip3 install -r tests/requirements.txt
- - pip3 install -U tests/requirements.txt
+ - pip3 install -U -r tests/requirements.txt
# - pip3 install -U pytest
- pip3 install -r optional-requirements.txt
