Merge "Use make_mock_top function" into main
diff --git a/tests/lib.sh b/tests/lib.sh
index fb3b374..e0b319e 100644
--- a/tests/lib.sh
+++ b/tests/lib.sh
@@ -16,7 +16,7 @@
 if [[ -n "$HARDWIRED_MOCK_TOP" ]]; then
   MOCK_TOP="$HARDWIRED_MOCK_TOP"
 else
-  MOCK_TOP=$(mktemp -t -d st.XXXXX)
+  MOCK_TOP=$(make_mock_top)
   trap cleanup_mock_top EXIT
 fi