diff --git a/xCAT-test/autotest/testcase/infiniband/rhel-infiniband-diskfull-install.sh b/xCAT-test/autotest/testcase/infiniband/rhel-infiniband-diskfull-install.sh
index 7085a7545..5729e2f56 100755
--- a/xCAT-test/autotest/testcase/infiniband/rhel-infiniband-diskfull-install.sh
+++ b/xCAT-test/autotest/testcase/infiniband/rhel-infiniband-diskfull-install.sh
@@ -10,12 +10,12 @@
 # * If you intend to specify all the packages explicitly, set variable in LINE 61, 62, 63.
 #
 
-[ -n "$LINUX_DISTRO" ] &&
+[ -n "$LINUX_DISTRO" ] ||
 LINUX_DISTRO="rhels7.4"
-[ -n "$LINUX_ARCH" ] &&
+[ -n "$LINUX_ARCH" ] ||
 LINUX_ARCH="ppc64le"
 
-[ -n "$COMPUTE_NODE" ] &&
+[ -n "$COMPUTE_NODE" ] ||
 COMPUTE_NODE="nonexistent"
 SOURCE_DIR="/path/to/source"
 
diff --git a/xCAT-test/autotest/testcase/infiniband/rhel-infiniband-diskless-install.sh b/xCAT-test/autotest/testcase/infiniband/rhel-infiniband-diskless-install.sh
index f29cc891e..393f41f75 100755
--- a/xCAT-test/autotest/testcase/infiniband/rhel-infiniband-diskless-install.sh
+++ b/xCAT-test/autotest/testcase/infiniband/rhel-infiniband-diskless-install.sh
@@ -10,12 +10,12 @@
 # * If you intend to specify all the packages explicitly, set variable in LINE 61, 62, 63
 #
 
-[ -n "$LINUX_DISTRO" ] &&
+[ -n "$LINUX_DISTRO" ] ||
 LINUX_DISTRO="rhels7.4"
-[ -n "$LINUX_ARCH" ] &&
+[ -n "$LINUX_ARCH" ] ||
 LINUX_ARCH="ppc64le"
 
-[ -n "$COMPUTE_NODE" ] &&
+[ -n "$COMPUTE_NODE" ] ||
 COMPUTE_NODE="nonexistent"
 SOURCE_DIR="/path/to/source"