Update envrc file

.envrc

@@ -1,17 +1,20 @@
-layout python python2
-if [ ! -f ".direnv/direnv.lock" ]; then
+python_version=python2
+lock_file="direnv.$python_version.lock"
+
+layout python $python_version
+
+if [ ! -f ".direnv/$lock_file" ]; then
+   date +%FT%TZ > ".direnv/$lock_file"
 
    for req in requirements requirements-test; do
       if [ -f $req.txt ]; then
          echo "direnv: installing project $req"
-         pip install -r $req.txt 1> /dev/null
+         pip install -r $req.txt
       fi
    done
 
-   for package in ipython tox; do
+   for package in ipython pytest tox; do
       echo "direnv: installing $package"
-      pip install --upgrade $package 1> /dev/null
+      pip install --upgrade $package
    done
-
-   date +%FT%TZ > .direnv/direnv.lock
 fi