diff --git a/lib/ironic b/lib/ironic
index 55272b9..141b2fd 100644
--- a/lib/ironic
+++ b/lib/ironic
@@ -57,7 +57,7 @@
 # Set up defaults for functional / integration testing
 IRONIC_SCRIPTS_DIR=${IRONIC_SCRIPTS_DIR:-$TOP_DIR/tools/ironic/scripts}
 IRONIC_TEMPLATES_DIR=${IRONIC_TEMPLATES_DIR:-$TOP_DIR/tools/ironic/templates}
-IRONIC_BAREMETAL_BASIC_OPS=$(trueorfalse False $IRONIC_BAREMETAL_BASIC_OPS)
+IRONIC_BAREMETAL_BASIC_OPS=$(trueorfalse False IRONIC_BAREMETAL_BASIC_OPS)
 IRONIC_ENABLED_DRIVERS=${IRONIC_ENABLED_DRIVERS:-fake,pxe_ssh,pxe_ipmitool}
 IRONIC_SSH_USERNAME=${IRONIC_SSH_USERNAME:-`whoami`}
 IRONIC_SSH_KEY_DIR=${IRONIC_SSH_KEY_DIR:-$IRONIC_DATA_DIR/ssh_keys}
@@ -84,7 +84,7 @@
 IRONIC_VM_LOG_DIR=${IRONIC_VM_LOG_DIR:-$IRONIC_DATA_DIR/logs/}
 
 # Use DIB to create deploy ramdisk and kernel.
-IRONIC_BUILD_DEPLOY_RAMDISK=`trueorfalse True $IRONIC_BUILD_DEPLOY_RAMDISK`
+IRONIC_BUILD_DEPLOY_RAMDISK=$(trueorfalse True IRONIC_BUILD_DEPLOY_RAMDISK)
 # If not use DIB, these files are used as deploy ramdisk/kernel.
 # (The value must be a absolute path)
 IRONIC_DEPLOY_RAMDISK=${IRONIC_DEPLOY_RAMDISK:-}
@@ -113,7 +113,7 @@
 TEMPEST_SERVICES+=,ironic
 
 # Enable iPXE
-IRONIC_IPXE_ENABLED=$(trueorfalse False $IRONIC_IPXE_ENABLED)
+IRONIC_IPXE_ENABLED=$(trueorfalse False IRONIC_IPXE_ENABLED)
 IRONIC_HTTP_DIR=${IRONIC_HTTP_DIR:-$IRONIC_DATA_DIR/httpboot}
 IRONIC_HTTP_SERVER=${IRONIC_HTTP_SERVER:-$HOST_IP}
 IRONIC_HTTP_PORT=${IRONIC_HTTP_PORT:-8088}