Switch to pytest as of PR NeuralEnsemble#413

.travis.yml

@@ -15,7 +15,7 @@ matrix:
       before_script:
         - pip install -r requirements/requirements-extras.txt
         - pip install mpi4py
-      script: mpiexec -n 1 python -m mpi4py.futures -m nose --with-coverage --cover-package=elephant
+      script: mpiexec -n 1 python -m mpi4py.futures -m pytest --cov=elephant --import-mode=importlib
       after_success: coveralls || echo "coveralls failed"
 
     - name: "conda 3.7"
@@ -62,12 +62,12 @@ install:
 
   - pip -V
   - pip install -r requirements/requirements-tests.txt
-  - pip install coverage coveralls
+  - pip install pytest-cov coveralls
   - python setup.py install
   - python -c "import sys; sys.path.remove(''); import elephant; print(elephant.__file__)"
   - python -c "import sys; sys.path.remove(''); from elephant.spade import HAVE_FIM; assert HAVE_FIM"
   - pip list
   - python --version
 
 script:
-  nosetests --with-coverage --cover-package=elephant
+  pytest --cov=elephant --import-mode=importlib

requirements/requirements-tests.txt

@@ -1 +1 @@
-nose>=1.3.3
+pytest