diff --git a/build/tools/appveyor-test.bat b/build/tools/appveyor-test.bat
index d755030093..5100ef9e9d 100755
--- a/build/tools/appveyor-test.bat
+++ b/build/tools/appveyor-test.bat
@@ -4,7 +4,7 @@ echo.
 
 pip install httpbin
 start /b python -m httpbin.core
-set WX_TEST_WEBREQUEST_URL="http://127.0.0.1:5000"
+set WX_TEST_WEBREQUEST_URL=http://127.0.0.1:5000
 curl http://127.0.0.1:5000/ip
 
 echo.