diff --git a/tests/scripts/task_cpp_unittest.sh b/tests/scripts/task_cpp_unittest.sh
index db68d9f9af6b..7905755b8813 100755
--- a/tests/scripts/task_cpp_unittest.sh
+++ b/tests/scripts/task_cpp_unittest.sh
@@ -19,6 +19,9 @@
 set -e
 set -u
 
+# Python is required by apps/bundle_deploy
+source tests/scripts/setup-pytest-env.sh
+
 export LD_LIBRARY_PATH="lib:${LD_LIBRARY_PATH:-}"
 # NOTE: important to use abspath, when VTA is enabled.
 export VTA_HW_PATH=`pwd`/3rdparty/vta-hw