# E4132

Invalid test parameter. Only one parameter with type `@test.Test` is allowed.

## Erroneous example

```{literalinclude} /sources/error_codes/4132_error/top.mbt
:language: moonbit
```

## Suggestion

It is not yet possible to pass custom parameters to tests, and you have to use
the predefined `@test.Test` type.

```{literalinclude} /sources/error_codes/4132_fixed/top.mbt
:language: moonbit
```

Or you can remove the parameter if it is not needed:

```{literalinclude} /sources/error_codes/4132_fixed/top_1.mbt
:language: moonbit
```