diff --git a/test/appveyor.yml b/test/appveyor.yml
index 5a7b7492..1d2fb105 100644
--- a/test/appveyor.yml
+++ b/test/appveyor.yml
@@ -33,7 +33,8 @@ skip_tags: true
 environment:
   matrix:
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0,msvc-12.0
+      TOOLSET: msvc-10.0,msvc-11.0,msvc-12.0
+      CXXSTD: 11
       ADDRMD: 32
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       TOOLSET: msvc-14.1