Verify extension build on appveyor

diff --git a/appveyor.yml b/appveyor.yml
index 98837bb662d8c7b19bf49a7f478cdea6c75319a7..be30b3c5070aeaf64c371c2bbd1444184270df51 100644 (file)
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,8 @@
 # Appveyor is Windows CI: https://ci.appveyor.com/project/bdarnell/tornado
 environment:
+  global:
+    TORNADO_EXTENSION: "1"
+
   # We only build with 3.5 because it works out of the box, while other
   # versions require lots of machinery.
   matrix: