Ctest invokes blender_test to get a list of tests. When it encounters
container-overflow, it aborts and gives incomplete list. I have
environment variable set to ignore container overflow. But the code
overwrites it.
It's similar to rBa181b156399a13fa429159112e30c8005d5e8a59
and rBA589d13408a60cbec34a8bc3cc798c586043743ae .