diff --git a/connector/protobuf/src/test/scala/org/apache/spark/sql/protobuf/ProtobufCatalystDataConversionSuite.scala b/connector/protobuf/src/test/scala/org/apache/spark/sql/protobuf/ProtobufCatalystDataConversionSuite.scala
index 6135cb2d59246..b7f17fece5fa6 100644
--- a/connector/protobuf/src/test/scala/org/apache/spark/sql/protobuf/ProtobufCatalystDataConversionSuite.scala
+++ b/connector/protobuf/src/test/scala/org/apache/spark/sql/protobuf/ProtobufCatalystDataConversionSuite.scala
@@ -138,6 +138,7 @@ class ProtobufCatalystDataConversionSuite
         data != null &&
         (data.get(0) == defaultValue ||
           (dt.fields(0).dataType == BinaryType &&
+            data.get(0) != null &&
             data.get(0).asInstanceOf[Array[Byte]].isEmpty)))
         data = generator().asInstanceOf[Row]