diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
index d9f32c000a..90c0bf7d8b 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
@@ -20,6 +20,8 @@ package org.apache.spark.sql.catalyst.expressions
 import java.sql.{Date, Timestamp}
 import java.util.{Calendar, Locale, TimeZone}
 
+import scala.util.Random
+
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.InternalRow
@@ -110,7 +112,7 @@ class CastSuite extends SparkFunSuite with ExpressionEvalHelper {
   }
 
   test("cast string to timestamp") {
-    for (tz <- ALL_TIMEZONES) {
+    for (tz <- Random.shuffle(ALL_TIMEZONES).take(50)) {
       def checkCastStringToTimestamp(str: String, expected: Timestamp): Unit = {
         checkEvaluation(cast(Literal(str), TimestampType, Option(tz.getID)), expected)
       }