Try this Travis fix again.

.travis.yml

@@ -29,17 +29,18 @@ before_script: |
       pip2 install numpy 3to2  # Install numpy and 3to2 for Python 2
       brew install boost
   else
-    pip2 install --user --install-option="--no-cython-compile" cython
-    pip2 install --user 3to2
+      pip2 install --user --install-option="--no-cython-compile" cython
+      pip2 install --user 3to2
   fi
   rm -f cantera.conf
 script: |
   if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
       scons build -j2 VERBOSE=y python2_package=full python3_package=full python3_cmd=/usr/bin/python3 blas_lapack_libs=lapack,blas optimize=n coverage=y
+      scons test
   else
       python3 `which scons` build -j2 VERBOSE=y python2_package=full python3_package=full python2_cmd=/usr/local/opt/python@2/bin/python2 blas_lapack_libs=lapack,blas optimize=n coverage=y
+      python3 `which scons` test
   fi
-  scons test
 after_success: |
   if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
       bash <(curl -s https://codecov.io/bash)