diff --git a/appveyor.yml b/appveyor.yml
index 2135487..a293278 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -48,7 +48,12 @@ environment:
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2026
       BOOST: 1_91_0
       TOOLSET: msvc-14.5
-      CXX_STANDARD: 20,latest
+      CXX_STANDARD: 20
+
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2026
+      BOOST: 1_91_0
+      TOOLSET: msvc-14.5
+      CXX_STANDARD: latest
 
     # CMake builds
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015