# Test settings

A test needs no settings. Without them, its clock is fixed at
2000-01-01T00:00:00Z, never the real time; each configuration field
has its `test:` or `default:` value from `config.jadpo`; and each call to a
provider answers with its fake's generated default.

To change any of these, write a `name: value` setting at the top of the
test's body, before its first statement. There are three, and all are
optional.

## `clock:`

The instant the test starts at, written out: `"2026-01-15T12:00:00Z"`
([Controlling time](controlling-time.md)).

## `config:`

Configuration values that differ from the test values in `config.jadpo`
([Configuration in tests](configuration-in-tests.md)).

## `fakes:`

The responses each integration operation gives, in order
([Fakes for integrations](fakes-for-integrations.md)).

## Everything in the test itself

Settings are written once per test, so a reader sees everything that
shapes the result in the test itself. Shared data isn't a setting: it
comes from fixtures ([Shared test data: fixtures](shared-test-data-fixtures.md)).