diff --git a/tests/integration/update.bats b/tests/integration/update.bats
index 617b1d43bbe..f30746e4e07 100644
--- a/tests/integration/update.bats
+++ b/tests/integration/update.bats
@@ -423,7 +423,7 @@ EOF
     root_period=$(cat "${CGROUP_CPU_BASE_PATH}/cpu.rt_period_us")
     root_runtime=$(cat "${CGROUP_CPU_BASE_PATH}/cpu.rt_runtime_us")
     # the following IFS magic sets dirs=("runc-cgroups-integration-test" "test-cgroup")
-    IFS='/' read -r -a dirs <<< $(echo ${CGROUP_CPU} | sed -e s@^${CGROUP_CPU_BASE_PATH}/@@)
+    IFS='/' read -r -a dirs <<< "${CGROUP_CPU//${CGROUP_CPU_BASE_PATH}/}"
     for (( i = 0; i < ${#dirs[@]}; i++ )); do
         local target="$CGROUP_CPU_BASE_PATH"
         for (( j = 0; j <= i; j++ )); do