diff --git a/core/src/test/java/org/springframework/security/access/annotation/BusinessServiceImpl.java b/core/src/test/java/org/springframework/security/access/annotation/BusinessServiceImpl.java
index 0e732bf480..587e795f5a 100644
--- a/core/src/test/java/org/springframework/security/access/annotation/BusinessServiceImpl.java
+++ b/core/src/test/java/org/springframework/security/access/annotation/BusinessServiceImpl.java
@@ -16,6 +16,7 @@
 
 package org.springframework.security.access.annotation;
 
+import java.io.Serial;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -24,6 +25,9 @@ import java.util.List;
  */
 public class BusinessServiceImpl<E extends Entity> implements BusinessService {
 
+	@Serial
+	private static final long serialVersionUID = -4249394090237180795L;
+
 	@Override
 	@Secured({ "ROLE_USER" })
 	public void someUserMethod1() {
diff --git a/core/src/test/java/org/springframework/security/access/annotation/ExpressionProtectedBusinessServiceImpl.java b/core/src/test/java/org/springframework/security/access/annotation/ExpressionProtectedBusinessServiceImpl.java
index 9d1b066d01..1ca226709b 100644
--- a/core/src/test/java/org/springframework/security/access/annotation/ExpressionProtectedBusinessServiceImpl.java
+++ b/core/src/test/java/org/springframework/security/access/annotation/ExpressionProtectedBusinessServiceImpl.java
@@ -16,6 +16,7 @@
 
 package org.springframework.security.access.annotation;
 
+import java.io.Serial;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -25,6 +26,9 @@ import org.springframework.security.access.prepost.PreFilter;
 
 public class ExpressionProtectedBusinessServiceImpl implements BusinessService {
 
+	@Serial
+	private static final long serialVersionUID = -3320014879907436606L;
+
 	@Override
 	public void someAdminMethod() {
 	}
diff --git a/core/src/test/java/org/springframework/security/access/annotation/Jsr250BusinessServiceImpl.java b/core/src/test/java/org/springframework/security/access/annotation/Jsr250BusinessServiceImpl.java
index b19b19bfcf..6d9f34ac61 100644
--- a/core/src/test/java/org/springframework/security/access/annotation/Jsr250BusinessServiceImpl.java
+++ b/core/src/test/java/org/springframework/security/access/annotation/Jsr250BusinessServiceImpl.java
@@ -16,6 +16,7 @@
 
 package org.springframework.security.access.annotation;
 
+import java.io.Serial;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -28,6 +29,9 @@ import jakarta.annotation.security.RolesAllowed;
 @PermitAll
 public class Jsr250BusinessServiceImpl implements BusinessService {
 
+	@Serial
+	private static final long serialVersionUID = -7550211450382764339L;
+
 	@Override
 	@RolesAllowed("ROLE_USER")
 	public void someUserMethod1() {