diff --git a/test/system/libs/helpers.bash b/test/system/libs/helpers.bash
index ae14ecf..e3b9494 100644
--- a/test/system/libs/helpers.bash
+++ b/test/system/libs/helpers.bash
@@ -3,16 +3,16 @@
 load 'libs/bats-support/load'
 load 'libs/bats-assert/load'
 
-readonly CONTAINERS_STORAGE_CONF="${BATS_SUITE_TMPDIR}/storage.conf"
+readonly CONTAINERS_STORAGE_CONF="$BATS_SUITE_TMPDIR/storage.conf"
 export CONTAINERS_STORAGE_CONF
 
 # Helpful globals
-readonly IMAGE_CACHE_DIR="${BATS_SUITE_TMPDIR}/image-cache"
-readonly TOOLBX_ROOTLESS_STORAGE_PATH="${BATS_SUITE_TMPDIR}/storage"
-readonly ROOTLESS_PODMAN_RUNROOT_DIR="${BATS_SUITE_TMPDIR}/runroot"
-readonly DOCKER_REG_ROOT="${BATS_SUITE_TMPDIR}/docker-registry-root"
-readonly DOCKER_REG_CERTS_DIR="${BATS_SUITE_TMPDIR}/certs"
-readonly DOCKER_REG_AUTH_DIR="${BATS_SUITE_TMPDIR}/auth"
+readonly IMAGE_CACHE_DIR="$BATS_SUITE_TMPDIR/image-cache"
+readonly TOOLBX_ROOTLESS_STORAGE_PATH="$BATS_SUITE_TMPDIR/storage"
+readonly ROOTLESS_PODMAN_RUNROOT_DIR="$BATS_SUITE_TMPDIR/runroot"
+readonly DOCKER_REG_ROOT="$BATS_SUITE_TMPDIR/docker-registry-root"
+readonly DOCKER_REG_CERTS_DIR="$BATS_SUITE_TMPDIR/certs"
+readonly DOCKER_REG_AUTH_DIR="$BATS_SUITE_TMPDIR/auth"
 readonly DOCKER_REG_URI="localhost:50000"
 readonly DOCKER_REG_NAME="docker-registry"
 
@@ -43,7 +43,7 @@ function _setup_environment() {
 
 function _setup_containers_storage() {
   # Set up a storage config file for PODMAN
-  echo -e "[storage]\n  driver = \"overlay\"\n  rootless_storage_path = \"${TOOLBX_ROOTLESS_STORAGE_PATH}\"\n  runroot = \"${ROOTLESS_PODMAN_RUNROOT_DIR}\"\n" > "${CONTAINERS_STORAGE_CONF}"
+  echo -e "[storage]\n  driver = \"overlay\"\n  rootless_storage_path = \"$TOOLBX_ROOTLESS_STORAGE_PATH\"\n  runroot = \"$ROOTLESS_PODMAN_RUNROOT_DIR\"\n" > "$CONTAINERS_STORAGE_CONF"
 }