diff --git a/src/main/java/ru/ulstu/conference/service/ConferenceService.java b/src/main/java/ru/ulstu/conference/service/ConferenceService.java
index 7162d37..633fa2e 100644
--- a/src/main/java/ru/ulstu/conference/service/ConferenceService.java
+++ b/src/main/java/ru/ulstu/conference/service/ConferenceService.java
@@ -16,6 +16,7 @@ import ru.ulstu.deadline.service.DeadlineService;
 import ru.ulstu.name.BaseService;
 import ru.ulstu.paper.model.Paper;
 import ru.ulstu.paper.service.PaperService;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.ping.service.PingService;
 import ru.ulstu.timeline.service.EventService;
 import ru.ulstu.user.model.User;
@@ -240,9 +241,10 @@ public class ConferenceService extends BaseService {
     }
 
     @Transactional
-    public int ping(ConferenceDto conferenceDto) throws IOException {
-        pingService.addPing(findOne(conferenceDto.getId()));
-        return conferenceRepository.updatePingConference(conferenceDto.getId());
+    public Ping ping(ConferenceDto conferenceDto) throws IOException {
+        Ping ping = pingService.addPing(findOne(conferenceDto.getId()));
+        conferenceRepository.updatePingConference(conferenceDto.getId());
+        return ping;
     }
 
     private Conference findOne(Integer conferenceId) {
diff --git a/src/main/java/ru/ulstu/paper/model/Paper.java b/src/main/java/ru/ulstu/paper/model/Paper.java
index 2624b66..15ee4b4 100644
--- a/src/main/java/ru/ulstu/paper/model/Paper.java
+++ b/src/main/java/ru/ulstu/paper/model/Paper.java
@@ -268,9 +268,15 @@ public class Paper extends BaseEntity implements UserContainer {
 
     @Override
     public boolean equals(Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-        if (!super.equals(o)) return false;
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        if (!super.equals(o)) {
+            return false;
+        }
         Paper paper = (Paper) o;
         return Objects.equals(title, paper.title) &&
                 status == paper.status &&
diff --git a/src/main/java/ru/ulstu/ping/service/PingService.java b/src/main/java/ru/ulstu/ping/service/PingService.java
index f7156f0..6666fdd 100644
--- a/src/main/java/ru/ulstu/ping/service/PingService.java
+++ b/src/main/java/ru/ulstu/ping/service/PingService.java
@@ -23,10 +23,10 @@ public class PingService {
     }
 
     @Transactional
-    public void addPing(Conference conference) throws IOException {
+    public Ping addPing(Conference conference) throws IOException {
         Ping newPing = new Ping(new Date(), userService.getCurrentUser());
         newPing.setConference(conference);
-        pingRepository.save(newPing);
+        return pingRepository.save(newPing);
     }
 
     public Integer countPingYesterday(Conference conference, Calendar calendar) {
diff --git a/src/test/java/ru/ulstu/conference/service/ConferenceServiceTest.java b/src/test/java/ru/ulstu/conference/service/ConferenceServiceTest.java
index 3a58cbb..5925aed 100644
--- a/src/test/java/ru/ulstu/conference/service/ConferenceServiceTest.java
+++ b/src/test/java/ru/ulstu/conference/service/ConferenceServiceTest.java
@@ -16,6 +16,7 @@ import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.deadline.service.DeadlineService;
 import ru.ulstu.paper.model.Paper;
 import ru.ulstu.paper.service.PaperService;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.ping.service.PingService;
 import ru.ulstu.timeline.service.EventService;
 import ru.ulstu.user.model.User;
@@ -65,6 +66,7 @@ public class ConferenceServiceTest {
     private final Integer INDEX = 0;
     private final String NAME = "Name";
     private final boolean DISABLED = true;
+    private final Integer YEAR = 2019;
 
     private List<Conference> conferences;
     private List<Deadline> deadlines;
@@ -127,19 +129,27 @@ public class ConferenceServiceTest {
 
     @Test
     public void getExistConferenceById() {
-        when(conferenceRepository.findOne(1)).thenReturn(conferenceWithId);
+        when(conferenceRepository.findOne(ID)).thenReturn(conferenceWithId);
         when(paperService.findAllNotSelect(new ArrayList<>())).thenReturn(papers);
         when(userService.getCurrentUser()).thenReturn(user);
-        conferenceDto.setDisabledTakePart(true);
-        assertEquals(conferenceDto, conferenceService.getExistConferenceById(1));
+        ConferenceDto newConferenceDto = new ConferenceDto(conferenceWithId);
+        newConferenceDto.setNotSelectedPapers(papers);
+        newConferenceDto.setDisabledTakePart(!DISABLED);
+        ConferenceDto result = conferenceService.getExistConferenceById(ID);
+        assertEquals(newConferenceDto.getId(), result.getId());
+        assertEquals(newConferenceDto.getNotSelectedPapers(), result.getNotSelectedPapers());
+        assertEquals(newConferenceDto.isDisabledTakePart(), result.isDisabledTakePart());
     }
 
     @Test
     public void getNewConference() {
+        when(paperService.findAllNotSelect(new ArrayList<>())).thenReturn(papers);
         ConferenceDto newConferenceDto = new ConferenceDto();
         newConferenceDto.setNotSelectedPapers(papers);
-        when(paperService.findAllNotSelect(new ArrayList<>())).thenReturn(papers);
-        assertEquals(newConferenceDto, conferenceService.getNewConference());
+        ConferenceDto result = conferenceService.getNewConference();
+        assertEquals(newConferenceDto.getId(), result.getId());
+        assertEquals(newConferenceDto.getNotSelectedPapers(), result.getNotSelectedPapers());
+        assertEquals(newConferenceDto.isDisabledTakePart(), result.isDisabledTakePart());
     }
 
     @Test
@@ -239,23 +249,25 @@ public class ConferenceServiceTest {
     @Test
     public void filter() {
         ConferenceFilterDto conferenceFilterDto = new ConferenceFilterDto();
-        conferenceFilterDto.setFilterUserId(1);
-        conferenceFilterDto.setYear(2019);
-        when(userService.findById(1)).thenReturn(user);
-        when(conferenceRepository.findByUserAndYear(user, 2019)).thenReturn(conferences);
+        conferenceFilterDto.setFilterUserId(ID);
+        conferenceFilterDto.setYear(YEAR);
+        when(userService.findById(ID)).thenReturn(user);
+        when(conferenceRepository.findByUserAndYear(user, YEAR)).thenReturn(conferences);
         assertEquals(Collections.singletonList(conferenceDto), conferenceService.filter(conferenceFilterDto));
     }
 
     @Test
     public void isAttachedToConference() {
-        when(conferenceRepository.isPaperAttached(1)).thenReturn(true);
-        assertTrue(conferenceService.isAttachedToConference(1));
+        when(conferenceRepository.isPaperAttached(ID)).thenReturn(true);
+        assertTrue(conferenceService.isAttachedToConference(ID));
     }
 
     @Test
     public void ping() throws IOException {
+        Ping ping = new Ping();
         when(conferenceRepository.findOne(ID)).thenReturn(conferenceWithId);
-        when(conferenceRepository.updatePingConference(1)).thenReturn(1);
-        assertEquals(1, conferenceService.ping(conferenceDto));
+        when(pingService.addPing(conferenceWithId)).thenReturn(ping);
+        when(conferenceRepository.updatePingConference(ID)).thenReturn(INDEX);
+        assertEquals(ping, conferenceService.ping(conferenceDto));
     }
 }
\ No newline at end of file