diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/config/JWTRequestFilter.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/config/JWTRequestFilter.java
index 3cfc094..f5d7d18 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/config/JWTRequestFilter.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/config/JWTRequestFilter.java
@@ -18,9 +18,15 @@ import org.springframework.web.filter.OncePerRequestFilter;
 @Component
 public class JWTRequestFilter extends OncePerRequestFilter {
 
-    @Autowired private JWTUserDetailsService jwtUserDetailsService;
+    private final JWTUserDetailsService jwtUserDetailsService;
+    private final JWTTokenUtils jwtTokenUtils;
 
-    @Autowired private JWTTokenUtils jwtTokenUtils;
+    @Autowired
+    public JWTRequestFilter(
+            JWTUserDetailsService jwtUserDetailsService, JWTTokenUtils jwtTokenUtils) {
+        this.jwtUserDetailsService = jwtUserDetailsService;
+        this.jwtTokenUtils = jwtTokenUtils;
+    }
 
     @Override
     protected void doFilterInternal(
diff --git a/src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/RegularLightControllerTests.java b/src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/RegularLightControllerTests.java
index f3c2136..1e4523f 100644
--- a/src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/RegularLightControllerTests.java
+++ b/src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/RegularLightControllerTests.java
@@ -9,16 +9,10 @@ import static org.mockito.Mockito.when;
 
 import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.SwitchableSaveRequest;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
-import ch.usi.inf.sa4.sanmarinoes.smarthut.models.DeviceRepository;
-import ch.usi.inf.sa4.sanmarinoes.smarthut.models.RegularLight;
-import ch.usi.inf.sa4.sanmarinoes.smarthut.models.RegularLightRepository;
-import ch.usi.inf.sa4.sanmarinoes.smarthut.models.SceneRepository;
-import ch.usi.inf.sa4.sanmarinoes.smarthut.models.State;
-import ch.usi.inf.sa4.sanmarinoes.smarthut.models.StateRepository;
-import ch.usi.inf.sa4.sanmarinoes.smarthut.models.UserRepository;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.models.*;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.service.DeviceService;
-import ch.usi.inf.sa4.sanmarinoes.smarthut.utils.Utils;
 import java.security.Principal;
+import java.util.Optional;
 import lombok.SneakyThrows;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
@@ -109,12 +103,13 @@ public class RegularLightControllerTests {
         when(deviceService.saveAsGuest(any(RegularLight.class), eq("user"), anyLong()))
                 .thenAnswer(i -> i.getArguments()[0]);
 
-        when(Utils.returnIfGuest(
-                        any(UserRepository.class),
-                        any(RegularLight.class),
-                        anyLong(),
-                        any(Principal.class)))
-                .thenAnswer(i -> i.getArguments()[1]);
+        User guest = new User();
+        User host = new User();
+        host.getGuests().add(guest);
+        guest.getHosts().add(host);
+
+        when(userRepository.findById(20L)).thenReturn(Optional.of(host));
+        when(userRepository.findByUsername("user")).thenReturn(guest);
 
         MockHttpServletRequest request = new MockHttpServletRequest();
         RequestContextHolder.setRequestAttributes(new ServletRequestAttributes(request));