diff --git a/processing/src/test/java/org/apache/druid/query/timeseries/TimeSeriesUnionQueryRunnerTest.java b/processing/src/test/java/org/apache/druid/query/timeseries/TimeSeriesUnionQueryRunnerTest.java
index 812bf1e2629b..40a056f0c205 100644
--- a/processing/src/test/java/org/apache/druid/query/timeseries/TimeSeriesUnionQueryRunnerTest.java
+++ b/processing/src/test/java/org/apache/druid/query/timeseries/TimeSeriesUnionQueryRunnerTest.java
@@ -36,6 +36,7 @@
 import org.apache.druid.query.aggregation.LongSumAggregatorFactory;
 import org.apache.druid.query.context.ResponseContext;
 import org.apache.druid.segment.TestHelper;
+import org.apache.druid.testing.InitializedNullHandlingTest;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -44,7 +45,7 @@
 import java.util.List;
 
 @RunWith(Parameterized.class)
-public class TimeSeriesUnionQueryRunnerTest
+public class TimeSeriesUnionQueryRunnerTest extends InitializedNullHandlingTest
 {
   private final QueryRunner runner;
   private final boolean descending;