Write a CSS class that applies a black border to an HTML element with a class of "test"
```css
.test {
    border: 1px solid black;
}
```
Complete the following task based on the instruction and optional input provided.### Instruction:
Write a CSS class that applies a black border to an HTML element with a class of "test"

### Input:
N/A

### Output:
```css
.test {
    border: 1px solid black;
}
```