diff --git a/dao/src/main/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDao.java b/dao/src/main/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDao.java
index 9c2dce109b..4d023c6215 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDao.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDao.java
@@ -146,7 +146,7 @@ public abstract class AbstractChunkedAggregationTimeseriesDao extends AbstractSq
         return Futures.immediateFuture(DaoUtil.convertDataList(tsKvEntities));
     }
 
-    private ListenableFuture<Optional<TsKvEntry>> findAndAggregateAsync(EntityId entityId, String key, long startTs, long endTs, long ts, Aggregation aggregation) {
+    ListenableFuture<Optional<TsKvEntry>> findAndAggregateAsync(EntityId entityId, String key, long startTs, long endTs, long ts, Aggregation aggregation) {
         List<CompletableFuture<TsKvEntity>> entitiesFutures = new ArrayList<>();
         switchAggregation(entityId, key, startTs, endTs, aggregation, entitiesFutures);
         return Futures.transform(setFutures(entitiesFutures), entity -> {
diff --git a/dao/src/test/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDaoTest.java b/dao/src/test/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDaoTest.java
new file mode 100644
index 0000000000..b8e59daa17
--- /dev/null
+++ b/dao/src/test/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDaoTest.java
@@ -0,0 +1,44 @@
+package org.thingsboard.server.dao.sqlts;
+
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import org.junit.Before;
+import org.junit.Test;
+import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.common.data.kv.Aggregation;
+import org.thingsboard.server.common.data.kv.BaseReadTsKvQuery;
+import org.thingsboard.server.common.data.kv.ReadTsKvQuery;
+import org.thingsboard.server.common.data.kv.TsKvEntry;
+
+import java.util.Optional;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.BDDMockito.willCallRealMethod;
+import static org.mockito.BDDMockito.willReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+public class AbstractChunkedAggregationTimeseriesDaoTest {
+
+    AbstractChunkedAggregationTimeseriesDao tsDao;
+
+    @Before
+    public void setUp() throws Exception {
+        tsDao = mock(AbstractChunkedAggregationTimeseriesDao.class);
+        ListenableFuture<Optional<TsKvEntry>> optionalListenableFuture = Futures.immediateFuture(Optional.of(mock(TsKvEntry.class)));
+        willReturn(optionalListenableFuture).given(tsDao).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
+    }
+
+    @Test
+    public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanLastIntervalShorterThanOthersAndEqualsEndTs() {
+        ReadTsKvQuery query = new BaseReadTsKvQuery("temp", 0, 3000, 2000, 0, Aggregation.COUNT, "DESC");
+        willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
+        tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
+        verify(tsDao, times(2)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, "temp", 0, 2000, 1000, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, "temp", 2001, 3000, 2500, Aggregation.COUNT);
+    }
+}
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