diff --git a/appveyor.yml b/appveyor.yml
index 9d6b8e2..7d91c43 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,10 +1,15 @@
 version: '{build}'
+
+# init:
+#   - ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
+
 install:
   - SET PATH=C:\Ruby%ruby_version%\bin;%PATH%
-  - "%devkit%\\devkitvars.bat"
+  - IF %ridk%==0 "%devkit%\\devkitvars.bat"
   - ruby --version
   - gem --version
-  - bundle install
+  - IF %ridk%==0 bundle install
+  - IF %ridk%==1 ridk.cmd exec bundle install
 build: off
 test_script:
   - bundle exec rake test
@@ -12,20 +17,34 @@ test_script:
 # https://www.appveyor.com/docs/installed-software/#ruby
 environment:
   matrix:
+    - ruby_version: "25-x64"
+      ridk: 1
+    - ruby_version: "25"
+      ridk: 1
+    - ruby_version: "24-x64"
+      ridk: 1
+    - ruby_version: "24"
+      ridk: 1
     - ruby_version: "23-x64"
       devkit: C:\Ruby23-x64\DevKit
+      ridk: 0
     - ruby_version: "23"
       devkit: C:\Ruby23\DevKit
+      ridk: 0
     - ruby_version: "22-x64"
       devkit: C:\Ruby23-x64\DevKit
+      ridk: 0
     - ruby_version: "21-x64"
       devkit: C:\Ruby23-x64\DevKit
+      ridk: 0
     - ruby_version: "22"
       devkit: C:\Ruby23\DevKit
       WIN_RAPID: true
+      ridk: 0
     - ruby_version: "21"
       devkit: C:\Ruby23\DevKit
       WIN_RAPID: true
+      ridk: 0
 matrix:
   allow_failures:
     - ruby_version: "21"