extra blank lines when running tests in transcript

**Describe and demonstrate the bug**

There's maybe one blank line per test before the test output is printed.
See https://gist.github.com/aryairani/f8552747d9e5c10fcf11de744af48197

**Environment (please complete the following information):**
 - `ucm --version` d3f20d7a5
 - OS/Architecture: macOS 15.5
