also unit tests now need config.json

.travis.yml

@@ -16,16 +16,15 @@ install:
 - pip install --upgrade flake8 coveralls pytest-random-order mypy
 - pip install -r requirements.txt
 - pip install -e .
+- cp config.json.example config.json
 jobs:
   include:
     - script: 
       - pytest --cov=freqtrade --cov-config=.coveragerc freqtrade/tests/
       - coveralls
     - script:
-      - cp config.json.example config.json
       - python freqtrade/main.py --datadir freqtrade/tests/testdata backtesting
     - script:
-      - cp config.json.example config.json
       - python freqtrade/main.py --datadir freqtrade/tests/testdata hyperopt -e 5
     - script: flake8 freqtrade
     - script: mypy freqtrade