twalthr commented on a change in pull request #18878:
URL: https://github.com/apache/flink/pull/18878#discussion_r820526572



##########
File path: 
flink-table/flink-table-planner/src/test/java/org/apache/flink/table/planner/plan/nodes/exec/serde/IntervalJoinSpecJsonSerdeTest.java
##########
@@ -22,28 +22,21 @@
 import org.apache.flink.table.planner.plan.nodes.exec.spec.JoinSpec;
 import org.apache.flink.table.runtime.operators.join.FlinkJoinType;
 
-import 
org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper;
-
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 
-import static org.junit.Assert.assertEquals;
+import static 
org.apache.flink.table.planner.plan.nodes.exec.serde.JsonSerdeTestUtil.testJsonRoundTrip;
 
 /** Tests for {@link IntervalJoinSpec} serialization and deserialization. */
 public class IntervalJoinSpecJsonSerdeTest {

Review comment:
       this one not `CONCURRENT`?




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