diff --git a/.appveyor.yml b/.appveyor.yml
index dbf6ee22..4ecf9632 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -160,7 +160,13 @@ install:
 
 build: off
 
-test_script: ci\build.bat
+test_script: |
+  if defined ADDPATH (
+    cd %ADDPATH%
+    dir
+    cd %APPVEYOR_BUILD_FOLDER%
+  )
+  ci\build.bat
 
 for:
   # CodeCov coverage build