diff --git a/.travis.yml b/.travis.yml
index 48f4628..c030267 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,85 +1,86 @@
 language: cpp
 dist: trusty
 env:
 matrix:
   fast_finish: true
   include:
     - os: linux
       addons:
         apt:
           sources:
             - ubuntu-toolchain-r-test
           packages:
             - g++-4.9
             - libeigen3-dev
       env: COMPILER=gcc GCC=4.9
     - os: linux
       addons:
         apt:
           sources:
             - ubuntu-toolchain-r-test
           packages:
             - g++-5
             - libeigen3-dev
       env: COMPILER=gcc GCC=5
     - os: linux
       addons:
         apt:
           sources:
             - ubuntu-toolchain-r-test
           packages:
             - g++-6
             - libeigen3-dev
       env: COMPILER=gcc GCC=6
 env:
   global:
     - MINCONDA_VERSION="latest"
     - MINCONDA_LINUX="Linux-x86_64"
     - MINCONDA_OSX="MacOSX-x86_64"
 before_install:
     - |
       # Configure build variables
       if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
         if [[ "$COMPILER" == "gcc" ]]; then
           export CXX=g++-$GCC CC=gcc-$GCC;
         fi
         if [[ "$COMPILER" == "clang" ]]; then
           export CXX=clang++-$CLANG CC=clang-$CLANG;
         fi
       elif [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
         export CXX=clang++ CC=clang;
       fi
 install:
     # Define the version of miniconda to download
     - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
         MINCONDA_OS=$MINCONDA_LINUX;
       elif [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
         MINCONDA_OS=$MINCONDA_OSX;
       fi
     - wget "http://repo.continuum.io/miniconda/Miniconda3-$MINCONDA_VERSION-$MINCONDA_OS.sh" -O miniconda.sh;
     - bash miniconda.sh -b -p $HOME/miniconda
     - export PATH="$HOME/miniconda/bin:$PATH"
     - hash -r
     - conda config --set always_yes yes --set changeps1 no
     - conda update -q conda
     - conda install cmake -c conda-forge
     - conda install xtl -c QuantStack
     - conda install xsimd -c QuantStack
     - conda install xtensor -c QuantStack
     - conda install nlohmann_json -c QuantStack
     # build path
     - cd develop
     - mkdir build
     - cd build
     # install catch
     - git clone https://github.com/catchorg/Catch2.git
     - cd Catch2
     - mkdir build
     - cd build
     - mkdir opt
     - cmake .. -DCATCH_BUILD_TESTING=OFF -DCMAKE_INSTALL_PREFIX:PATH="${PWD}"/opt
     - make install
     - export INCLUDE_PATH="${PWD}"/opt/include:"${INCLUDE_PATH}"
     - cd ../..
+    # make test-cases
     - cmake ..
 script: make && ./test