diff --git a/appveyor.yml b/appveyor.yml
index 17a564ff..c7afac16 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -66,7 +66,7 @@ build: off
 
 test_script:
   - cd libs\config\test
-  - echo "FOR %%A in (%CXXSTD%) DO ..\..\..\b2 config_info_travis_install %ARGS% cxxstd=%%A" > info.bat
+  - echo "FOR ^%^%A in (^%CXXSTD^%) DO ..\..\..\b2 config_info_travis_install ^%ARGS^% cxxstd=^%^%A" > info.bat
   - type info.bat
   - info.bat
   - config_info_travis