diff --git a/spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala b/spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala
index 0d00867d1..47f56fead 100644
--- a/spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala
+++ b/spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala
@@ -1368,7 +1368,8 @@ class CometExpressionSuite extends CometTestBase with AdaptiveSparkPlanHelper {
           sql(s"create table $table(id int, name varchar(20)) using parquet")
           sql(
             s"insert into $table values(1, 'james smith'), (2, 'michael rose'), " +
-              "(3, 'robert williams'), (4, 'rames rose'), (5, 'james smith')")
+              "(3, 'robert williams'), (4, 'rames rose'), (5, 'james smith'), " +
+              "(6, 'robert rose-smith'), (7, 'james ähtäri')")
           checkSparkAnswerAndOperator(s"SELECT initcap(name) FROM $table")
         }
       }