# P0010

`t.assert(cond)` was given `false`. Fails the test (see [Tests](/runtime.md#tests)). Spans the call.

**Machine-applicable fix:** none.

## Example

This program fails with `P0010`.

```oska
test "is positive" {
    t.assert(1 < 0)
}
```

## Fixed

The same program, fixed.

```oska
test "is positive" {
    t.assert(0 < 1)
}
```

Listed in the [runtime notes](/runtime.md#p0010). `oskac explain P0010` prints this entry offline.