/src/main/java/org/fungover/storm/httphandler/Response.java
public class Response {
   
 //initialize this.headers before calling this.reset()
     public Response() {    
         this.headers = new HashMap<>();
         this.reset();
     }
 
// use headers.clear() instead of assigning null
     public void reset() {
         this.statusCode = 0;
         this.body = new byte[0];
          this.headers.clear();
     }
 
//assert that result is equal to empty map instead of null
 src/test/java/org/fungover/storm/httphandler/ResponseTest.java b/src/test/java/org/fungover/storm/httphandler public class ResponseTest {
    @Test
   void resettingResponseShouldSetHeadersToNull(){
        Map<String,String> map = new HashMap<>();
        map.put("1","3");
        response.setHeaders(map);
        response.reset();
         var result = response.getHeaders();
         assertThat(result).isEqualTo(Map.of());
     }