diff --git a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/classification/ClassificationHistoryQuery.java b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/classification/ClassificationHistoryQuery.java
index c96827238..c55f84c04 100644
--- a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/classification/ClassificationHistoryQuery.java
+++ b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/classification/ClassificationHistoryQuery.java
@@ -30,7 +30,7 @@ public interface ClassificationHistoryQuery
    * Add your created TimeInterval to your query.
    *
    * @param createdWithin the {@link TimeInterval} within which the searched-for classifications
-   *     were created.
+   *     were created. Both borders in each {@link TimeInterval} are inclusive.
    * @return the query
    */
   ClassificationHistoryQuery createdWithin(TimeInterval... createdWithin);
diff --git a/history/taskana-simplehistory-provider/src/test/java/acceptance/query/QueryClassificationHistoryAccTest.java b/history/taskana-simplehistory-provider/src/test/java/acceptance/query/QueryClassificationHistoryAccTest.java
index 26d07898a..0372bbb3a 100644
--- a/history/taskana-simplehistory-provider/src/test/java/acceptance/query/QueryClassificationHistoryAccTest.java
+++ b/history/taskana-simplehistory-provider/src/test/java/acceptance/query/QueryClassificationHistoryAccTest.java
@@ -4,7 +4,6 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import acceptance.AbstractAccTest;
 import java.time.Instant;
-import java.time.temporal.ChronoUnit;
 import java.util.Collections;
 import java.util.List;
 import org.junit.jupiter.api.Test;
@@ -135,7 +134,7 @@ class QueryClassificationHistoryAccTest extends AbstractAccTest {
     assertThat(returnValues).hasSize(6);
 
     TimeInterval timeInterval =
-        new TimeInterval(Instant.now().minus(1000L, ChronoUnit.DAYS), Instant.now());
+        new TimeInterval(Instant.parse("2018-01-28T14:55:00Z"), Instant.now());
     returnValues =
         historyService.createClassificationHistoryQuery().createdWithin(timeInterval).list();
     assertThat(returnValues).hasSize(11);