diff --git a/appveyor.yml b/appveyor.yml
index 0d3233f..2fe7a48 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -19,6 +19,12 @@ environment:
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       TOOLSET: msvc-14.1
       CXXSTD: 14,17
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: clang-win
+      CXXSTD: 14,17
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      TOOLSET: msvc-14.2
+      CXXSTD: 14,17
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       ADDPATH: C:\cygwin\bin;
       TOOLSET: gcc
@@ -53,4 +59,4 @@ build: off
 test_script:
   - PATH=%ADDPATH%%PATH%
   - if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
-  - b2 -j3 libs/throw_exception/test toolset=%TOOLSET% %CXXSTD%
+  - b2 -j3 libs/throw_exception/test toolset=%TOOLSET% %CXXSTD% variant=debug,release