p: Annotated[Optional[list[str]], Header(alias="p_alias")] = None,
):
    return {"p": p}


class HeaderModelOptionalListAlias(BaseModel):
    p: Optional[list[str]] = Field(None, alias="p_alias")


@app.get("/model-optional-list-alias")
async def read_model_optional_list_alias(
    p: Annotated[HeaderModelOptionalListAlias, Header()],
):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",