---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: malformedOptions.js
---
# Input
```jsx

```

# Diagnostics
```
malformedOptions.options:9:7 deserialize ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Found an unknown key `hook`.
  
     7 │ 					"level": "error",
     8 │ 					"options": {
   > 9 │ 						"hook": [
       │ 						^^^^^^
    10 │ 							{
    11 │ 								"name": "useMyEffect",
  
  i Known keys:
  
  - hooks
  

```