Update .travis.yml

.travis.yml

@@ -6,7 +6,7 @@ matrix:
   include:
     - name: "Python 2.7 on Linux"
       python: 2.7
-      env: TOXENV=py27
+      env: PIP=pip
     - name: "Python 3.5 on Linux"
       python: 3.5
     - name: "Python 3.6 on Linux"
@@ -21,10 +21,10 @@ matrix:
       python: nightly
     - name: "Pypy on Linux"
       python: pypy
-      env: TOXENV=py27
+      env: PIP=pip
     - name: "Pypy 3 on Linux"
       python: pypy3
-    - name: "Python 3 on older macOS"
+    - name: "Python 3.7 on older macOS"
       os: osx
       osx_image: xcode9.4
       language: shell
@@ -33,7 +33,7 @@ matrix:
         - sw_vers
         - python3 --version
         - pip3 --version
-    - name: "Python 3 on macOS"
+    - name: "Python 3.7 on macOS"
       os: osx
       osx_image: xcode11
       language: shell
@@ -49,7 +49,7 @@ matrix:
     - os: osx
 
 install:
-  - if echo $TOXENV | grep -q py27; then PIP=pip; else PIP=pip3; fi
+  - if [ $PIP ]; then true; else PIP=pip3; fi
   - travis_retry $PIP install -U pip wheel tox-travis
   - travis_retry $PIP install -U -r requirements.txt -e ".[test]"