diff --git a/appveyor.yml b/appveyor.yml
index 8a77ebb..ac9f285 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,15 +14,10 @@ branches:
 
 environment:
   matrix:
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
-      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0,msvc-12.0
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      TOOLSET: msvc-14.0
+      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0,msvc-12.0,msvc-14.0
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      TOOLSET: msvc-14.1
-      CXXSTD: 14,17
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      TOOLSET: clang-win
+      TOOLSET: msvc-14.1,clang-win
       CXXSTD: 14,17
 
 install: