diff --git a/core/src/test/scala/org/apache/spark/security/CryptoStreamUtilsSuite.scala b/core/src/test/scala/org/apache/spark/security/CryptoStreamUtilsSuite.scala
index 27a53e8205201..e3171116a3e14 100644
--- a/core/src/test/scala/org/apache/spark/security/CryptoStreamUtilsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/security/CryptoStreamUtilsSuite.scala
@@ -112,7 +112,7 @@ class CryptoStreamUtilsSuite extends SparkFunSuite {
           bytes.toByteArray()
         }.collect()(0)
 
-      assert(content != encrypted)
+      assert(!content.getBytes(UTF_8).sameElements(encrypted))
 
       val in = CryptoStreamUtils.createCryptoInputStream(new ByteArrayInputStream(encrypted),
         sc.conf, SparkEnv.get.securityManager.getIOEncryptionKey().get)