(Embedded mode) Erlang crashing when running tests

I'm getting the following logs appended to the end of output when running tests once I added the phoenix sync dep and ran it in embedded mode:

```
[os_mon] cpu supervisor port (cpu_sup): Erlang has closed
[os_mon] memory supervisor port (memsup): Erlang has closed
```

I use a test watcher and it also crashes, so it no longer works, which is a pain.

EDIT

Not positive if root cause is in phoenix_sync or electric.

Note: the repro below only kicked in when I added electric dep after phoenix_sync dep, but not sure if that's a signal of anything.