---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalidClass.cjs
---
# Input
```cjs
class C1 {
	test() {
		"use strict";
	}
}

const C2 = class {
	test() {
		"use strict";
	}
};

```

# Diagnostics
```
invalidClass.cjs:3:3 lint/suspicious/noRedundantUseStrict  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Redundant use strict directive.
  
    1 │ class C1 {
    2 │ 	test() {
  > 3 │ 		"use strict";
      │ 		^^^^^^^^^^^^^
    4 │ 	}
    5 │ }
  
  i All parts of a class's body are already in strict mode.
  
  > 1 │ class C1 {
      │ ^^^^^^^^^^
  > 2 │ 	test() {
  > 3 │ 		"use strict";
  > 4 │ 	}
  > 5 │ }
      │ ^
    6 │ 
    7 │ const C2 = class {
  
  i Safe fix: Remove the redundant use strict directive.
  
     1  1 │   class C1 {
     2  2 │   	test() {
     3    │ - → → "use·strict";
     4    │ - → }
        3 │ + → → → }
     5  4 │   }
     6  5 │   
  

```

```
invalidClass.cjs:9:3 lint/suspicious/noRedundantUseStrict  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Redundant use strict directive.
  
     7 │ const C2 = class {
     8 │ 	test() {
   > 9 │ 		"use strict";
       │ 		^^^^^^^^^^^^^
    10 │ 	}
    11 │ };
  
  i All parts of a class's body are already in strict mode.
  
     5 │ }
     6 │ 
   > 7 │ const C2 = class {
       │            ^^^^^^^
   > 8 │ 	test() {
   > 9 │ 		"use strict";
  > 10 │ 	}
  > 11 │ };
       │ ^
    12 │ 
  
  i Safe fix: Remove the redundant use strict directive.
  
     7  7 │   const C2 = class {
     8  8 │   	test() {
     9    │ - → → "use·strict";
    10    │ - → }
        9 │ + → → → }
    11 10 │   };
    12 11 │   
  

```