diff --git a/appveyor.yml b/appveyor.yml
index 037094a..9ae4a75 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,21 +6,13 @@
     # http://www.appveyor.com/docs/installed-software#python
 
     - PYTHON: "C:\\Python35"
-      UNSTABLE: 1
     - PYTHON: "C:\\Python36"
-      UNSTABLE: 1
     - PYTHON: "C:\\Python37"
-      UNSTABLE: 1
     - PYTHON: "C:\\Python38"
-      UNSTABLE: 1
     - PYTHON: "C:\\Python35-x64"
-      UNSTABLE: 1
     - PYTHON: "C:\\Python36-x64"
-      UNSTABLE: 1
     - PYTHON: "C:\\Python37-x64"
-      UNSTABLE: 1
     - PYTHON: "C:\\Python38-x64"
-      UNSTABLE: 1
 
 matrix:
   allow_failures: