diff --git a/conf/layer.conf b/conf/layer.conf
index 19e647e..716f8ac 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -13,4 +13,4 @@ LAYERSERIES_COMPAT_security = "thud"
 
 LAYERDEPENDS_security = "core openembedded-layer perl-layer networking-layer meta-python"
 
-DEFAULT_TEST_SUITES_pn-security-build-image = " ${PTESTTESTSUITE}"
+DEFAULT_TEST_SUITES_pn-security-build-image = " ping ssh ptest"