diff --git a/tck/src/main/java/com/sun/ts/tests/el/api/jakarta_el/resourcebundleelresolver/ELClientIT.java b/tck/src/main/java/com/sun/ts/tests/el/api/jakarta_el/resourcebundleelresolver/ELClientIT.java
index f49d176..a38ad4f 100644
--- a/tck/src/main/java/com/sun/ts/tests/el/api/jakarta_el/resourcebundleelresolver/ELClientIT.java
+++ b/tck/src/main/java/com/sun/ts/tests/el/api/jakarta_el/resourcebundleelresolver/ELClientIT.java
@@ -167,6 +167,7 @@
   private static class TckResourceBundle extends ResourceBundle
       implements Serializable {
 
+    private static final long serialVersionUID = 1L;
     private static final String KEYS = "Breakfast Lunch Dinner";
 
     @Override
diff --git a/tck/src/main/java/com/sun/ts/tests/el/common/util/SimpleBean.java b/tck/src/main/java/com/sun/ts/tests/el/common/util/SimpleBean.java
index 7f62e2d..628464e 100644
--- a/tck/src/main/java/com/sun/ts/tests/el/common/util/SimpleBean.java
+++ b/tck/src/main/java/com/sun/ts/tests/el/common/util/SimpleBean.java
@@ -21,6 +21,8 @@
 
 public class SimpleBean implements Serializable, SimpleInterface {
 
+  private static final long serialVersionUID = 1L;
+
   private String fullName = "Doug Donahue"; // Default Setting
 
   private String intention;
@@ -35,7 +37,7 @@
 
   /**
    * Set full name using the pattern firstName + " " + lastName.
-   * 
+   *
    * @param firstName
    * @param lastName
    */
diff --git a/tck/src/main/java/com/sun/ts/tests/el/signaturetest/SigTestResult.java b/tck/src/main/java/com/sun/ts/tests/el/signaturetest/SigTestResult.java
index 9544a91..2e59165 100644
--- a/tck/src/main/java/com/sun/ts/tests/el/signaturetest/SigTestResult.java
+++ b/tck/src/main/java/com/sun/ts/tests/el/signaturetest/SigTestResult.java
@@ -22,6 +22,8 @@
 
 public class SigTestResult implements Serializable {
 
+  private static final long serialVersionUID = 1L;
+
   private static final String NL = System.getProperty("line.separator", "\n");
 
   private List<String> failedPkgs = new ArrayList<>();