This test fails with timeout on macOS 10.12.
Memory allocation log from that machine (PIT for b141, b137):
Memory before creating the text: 3131328
Memory after creating the text: 3153328
Memory after setting the text: 16183408
Final memory after everything: 24691432

It does pass on OS X 10.10, log from there (b135):
Memory before creating the text: 3314384
Memory after creating the text: 3365952
Memory after setting the text: 6670664
Final memory after everything: 14026736

And it does pass on Ubuntu 16.04 and Windows 10.