diff --git a/httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/TestByteArrayCacheEntrySerializer.java b/httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/TestByteArrayCacheEntrySerializer.java
index 17cf8d9f7..ccdedf9bd 100644
--- a/httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/TestByteArrayCacheEntrySerializer.java
+++ b/httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/TestByteArrayCacheEntrySerializer.java
@@ -34,6 +34,7 @@ import static org.junit.Assert.assertTrue;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.ObjectOutputStream;
+import java.math.BigDecimal;
 import java.nio.charset.StandardCharsets;
 import java.util.Date;
 import java.util.HashMap;
@@ -49,8 +50,6 @@ import org.apache.hc.core5.http.message.StatusLine;
 import org.junit.Before;
 import org.junit.Test;
 
-import com.sun.rowset.JdbcRowSetImpl;
-
 public class TestByteArrayCacheEntrySerializer {
 
     private ByteArrayCacheEntrySerializer impl;
@@ -239,11 +238,11 @@ public class TestByteArrayCacheEntrySerializer {
     }
 
     private byte[] serializeProhibitedObject() throws IOException {
-        final JdbcRowSetImpl jdbcRowSet = new JdbcRowSetImpl();
+        final BigDecimal bigDecimal = new BigDecimal("1000.00");
         final ByteArrayOutputStream baos = new ByteArrayOutputStream();
         final ObjectOutputStream oos = new ObjectOutputStream(baos);
         try {
-            oos.writeObject(jdbcRowSet);
+            oos.writeObject(bigDecimal);
         } finally {
             oos.close();
         }