diff --git a/.appveyor.yml b/.appveyor.yml
index 093a86996..e6d53c661 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -2,15 +2,12 @@ environment:
   matrix:
     - JOB: "2.7 32-bit"
       PYTHON_HOME: "C:\\Python27"
-      TOXENV: "py27-cov"
 
     - JOB: "3.6 64-bit"
       PYTHON_HOME: "C:\\Python36-x64"
-      TOXENV: "py36-cov"
 
     - JOB: "3.7 64-bit"
       PYTHON_HOME: "C:\\Python37-x64"
-      TOXENV: "py37-cov"
 
 install:
   # If there is a newer build queued for the same PR, cancel this one.
@@ -36,19 +33,14 @@ install:
   # install the dependencies to run the tests
   - "python -m pip install tox"
 
-  # Make a 'pythonX.X.bat' file in the current directory so that tox will find
-  # it and 'pythonX.X' will mean what we want it to. E.g. for 'TOXENV=py37',
-  # this will save a 'python3.7.bat' file containing "@C:\Python27\python %*"
-  # Credit: https://nedbatchelder.com/blog/201509/appveyor.html
-  - "python -c \"import os; open('python{0}.{1}.bat'.format(*os.environ['TOXENV'][2:4]), 'w').write('@{0}\\\\python \\x25*\\n'.format(os.environ['PYTHON_HOME']))\""
-
-
 build: false
 
 test_script:
-  - "tox"
+  # run tests with the current 'python' in %PATH%, and measure test coverage
+  - "tox -e py-cov"
 
 after_test:
+  # upload test coverage to Codecov.io
   - "tox -e codecov"
 
 notifications: