diff --git a/alpine/packages/test/usr/bin/mobytest b/alpine/packages/test/usr/bin/mobytest
index 792ef0069..86814dbcf 100755
--- a/alpine/packages/test/usr/bin/mobytest
+++ b/alpine/packages/test/usr/bin/mobytest
@@ -7,7 +7,7 @@ diagnostics
 docker version
 docker info
 docker ps
-DOCKER_CONTENT_TRUST=-1 docker pull alpine
+DOCKER_CONTENT_TRUST=1 docker pull alpine
 docker run alpine true
 docker pull armhf/alpine
 docker run armhf/alpine uname -a