allout-widgets-run-unit-tests-on-load is a variable defined in `allout-widgets.el'.
Its value is

When non-nil, unit tests will be run at end of loading allout-widgets.

Generally, allout widgets code developers are the only ones who'll want to
set this.

(If set, this makes it an even better practice to exercise changes by
doing byte-compilation with a repeat count, so the file is loaded after

See `allout-widgets-run-unit-tests' to see what's run.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.