diff --git a/appveyor.yml b/appveyor.yml
index 879cd0d7..2cafb661 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,7 +15,8 @@ init: []
 install: []
 before_build:
 - git submodule update --init --recursive
-- cmake -H. -Bbuild -G "Visual Studio 14 2015 Win64" -D SHARED=%SHARED% -D STATIC=%STATIC% -D TESTS=1
+- echo cmake -H. -Bbuild -G"Visual Studio 14 2015 Win64" -DSHARED=%SHARED% -DSTATIC=%STATIC% -DTESTS=ON
+- cmake -H. -Bbuild -G"Visual Studio 14 2015 Win64" -DSHARED=%SHARED% -DSTATIC=%STATIC% -DTESTS=ON
 
 build:
   project: build\xlnt.sln