Github user heary-cao commented on the issue: https://github.com/apache/spark/pull/20516 @cloud-fan thank you for suggest. `./project/SparkBuild.scala:795: javaOptions in Test += "-Dspark.testing=1"` seems only the compiler of the spark effectively, No effect on the SparkFunSuite unit test. I update this PR to provides a solution to fix it. Can you help me to review it.
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