version: '{build}'
max_jobs: 3
environment:
  matrix:
  - Ruby_version: 25
  - Ruby_version: 25-x64
  - Ruby_version: 24
  - Ruby_version: 24-x64
  - Ruby_version: 23
  - Ruby_version: 23-x64
  - Ruby_version: 22
  - Ruby_version: 22-x64
  - Ruby_version: 21
  - Ruby_version: 21-x64  
  - Ruby_version: 200
  - Ruby_version: 200-x64

install:
  - set PATH=C:\Ruby%Ruby_version%\bin;%PATH%
  - bundle install --retry=3 --clean --force

build: off

test_script:
- bundle exec rake

version: '{build}'
max_jobs: 3
environment:
  matrix:
  - Ruby_version: 25
  - Ruby_version: 25-x64
  - Ruby_version: 24
  - Ruby_version: 24-x64
  - Ruby_version: 23
  - Ruby_version: 23-x64
  - Ruby_version: 22
  - Ruby_version: 22-x64
  - Ruby_version: 21
  - Ruby_version: 21-x64  
  - Ruby_version: 200
  - Ruby_version: 200-x64
  
matrix:
  allow_failures:
    - ruby_version: "25"

install:
  - set PATH=C:\Ruby%Ruby_version%\bin;%PATH%
  - bundle install --retry=3 --clean --force

build: off

test_script:
- bundle exec rake

Allow failure with Ruby 2.5
Allow failure with Ruby 2.5

Appveyor 2.5 has issue with json gem...
