diff --git a/application/src/test/java/org/thingsboard/server/transport/lwm2m/client/FwLwM2MDevice.java b/application/src/test/java/org/thingsboard/server/transport/lwm2m/client/FwLwM2MDevice.java
index 979a2b8c96..9265893fa2 100644
--- a/application/src/test/java/org/thingsboard/server/transport/lwm2m/client/FwLwM2MDevice.java
+++ b/application/src/test/java/org/thingsboard/server/transport/lwm2m/client/FwLwM2MDevice.java
@@ -140,45 +140,61 @@ public class FwLwM2MDevice extends BaseInstanceEnabler implements Destroyable {
     }
 
     private void startDownloading() {
+        long delay = 0;
+        // Step 1: state = 1
         scheduler.schedule(() -> {
-            try {
-                state.set(1);
-                fireResourceChange(3);
-                Thread.sleep(100);
-                state.set(2);
-                fireResourceChange(3);
-            } catch (Exception e) {
-            }
-        }, 100, TimeUnit.MILLISECONDS);
+            state.set(1);
+            fireResourceChange(3);
+            log.info("Downloading started: state=[{}]", state.get());
+        }, delay, TimeUnit.MILLISECONDS);
+
+        delay += 100; // next step after 100 ms
+
+        // Step 2: state = 2
+        scheduler.schedule(() -> {
+            state.set(2);
+            fireResourceChange(3);
+            log.info("Downloading in progress: state=[{}]", state.get());
+        }, delay, TimeUnit.MILLISECONDS);
     }
 
+
     private void startUpdating(LwM2mServer identity) {
         scheduler.schedule(() -> {
             try {
+                // Update state + result
                 state.set(3);
                 fireResourceChange(3);
-                Thread.sleep(100);
+
                 updateResult.set(1);
                 fireResourceChange(5);
-                this.pkgName = TITLE;
-                fireResourceChange(6);
-                this.pkgVersion = TARGET_FW_VERSION;
-                fireResourceChange(7);
+
                 if (this.leshanClient != null) {
                     log.info("Stop/reboot LwM2M client {}", this.leshanClient.getEndpoint(identity));
                     this.leshanClient.stop(false);
+
                     log.info("Start after update fw LwM2M client {}", this.leshanClient.getEndpoint(identity));
                     this.leshanClient.start();
-                    this.pkgName = this.pkgNameDef;
-                    this.pkgVersion = this.pkgVersionDef;
+
+                    // Delayed reset pkgName/pkgVersion, after reboot + registration
+                    scheduler.schedule(() -> {
+                        this.pkgName = this.pkgNameDef;
+                        fireResourceChange(6);
+
+                        this.pkgVersion = this.pkgVersionDef;
+                        fireResourceChange(7);
+
+                        log.info("FW resources updating to new values: pkgName=[{}], pkgVersion=[{}]",
+                                this.pkgName, this.pkgVersion);
+                    }, 15, TimeUnit.SECONDS); // 15 sec — safe timing
                 }
             } catch (Exception e) {
+                log.error("Error during firmware update", e);
             }
-        }, 100, TimeUnit.MILLISECONDS);
+        }, 0, TimeUnit.SECONDS); // start immediately, without further delay
     }
 
     protected void setLeshanClient(LeshanClient leshanClient) {
         this.leshanClient = leshanClient;
     }
-
 }
diff --git a/application/src/test/java/org/thingsboard/server/transport/lwm2m/client/SwLwM2MDevice.java b/application/src/test/java/org/thingsboard/server/transport/lwm2m/client/SwLwM2MDevice.java
index 76b9827f5a..6db2cf2e9b 100644
--- a/application/src/test/java/org/thingsboard/server/transport/lwm2m/client/SwLwM2MDevice.java
+++ b/application/src/test/java/org/thingsboard/server/transport/lwm2m/client/SwLwM2MDevice.java
@@ -33,6 +33,8 @@ import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import static org.thingsboard.server.controller.AbstractWebTest.TIMEOUT;
+
 @Slf4j
 public class SwLwM2MDevice extends BaseInstanceEnabler implements Destroyable {
 
@@ -85,10 +87,7 @@ public class SwLwM2MDevice extends BaseInstanceEnabler implements Destroyable {
         log.info("Write on Device resource /{}/{}/{}", getModel().id, getId(), resourceId);
 
         switch (resourceId) {
-            case 2:
-                startDownloading();
-                return WriteResponse.success();
-            case 3:
+            case 2, 3:
                 startDownloading();
                 return WriteResponse.success();
             default:
@@ -123,25 +122,34 @@ public class SwLwM2MDevice extends BaseInstanceEnabler implements Destroyable {
     }
 
     private void startDownloading() {
+        long delay = 0;
+
+        // Step 1: start downloading
         scheduler.schedule(() -> {
-            try {
-                state.set(1);
-                updateResult.set(1);
-                fireResourceChange(7);
-                fireResourceChange(9);
-                Thread.sleep(100);
-                state.set(2);
-                fireResourceChange(7);
-                Thread.sleep(100);
-                state.set(3);
-                fireResourceChange(7);
-                Thread.sleep(100);
-                updateResult.set(3);
-                fireResourceChange(9);
-            } catch (Exception e) {
-
-            }
-        }, 100, TimeUnit.MILLISECONDS);
+            state.set(1);
+            updateResult.set(1);
+            fireResourceChange(7);
+            fireResourceChange(9);
+        }, delay, TimeUnit.MILLISECONDS);
+
+        delay += 100;
+
+        // Step 2: downloading in progress
+        scheduler.schedule(() -> {
+            state.set(2);
+            fireResourceChange(7);
+        }, delay, TimeUnit.MILLISECONDS);
+
+        delay += 100;
+
+        // Step 3: downloading finished
+        scheduler.schedule(() -> {
+            state.set(3);
+            fireResourceChange(7);
+
+            updateResult.set(3);
+            fireResourceChange(9);
+        }, delay, TimeUnit.MILLISECONDS);
     }
 
     private void startUpdating() {
@@ -150,7 +158,13 @@ public class SwLwM2MDevice extends BaseInstanceEnabler implements Destroyable {
             updateResult.set(2);
             fireResourceChange(7);
             fireResourceChange(9);
+
+            // Optional: delayed log about FW update
+            scheduler.schedule(() -> {
+                log.info("FW resources updating to new values: state=[{}], updateResult=[{}]",
+                        state.get(), updateResult.get());
+            }, 500, TimeUnit.MILLISECONDS);
+
         }, 100, TimeUnit.MILLISECONDS);
     }
-
 }