diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index f28c8069..c4ffcdc5 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -38,7 +38,7 @@ $zts = false;
 $no_strip = false;
 
 // compress with upx
-$upx = false;
+$upx = true;
 
 // prefer downloading pre-built packages to speed up the build process
 $prefer_pre_built = false;