diff --git a/mod-audit-server/src/test/java/org/folio/utils/EntityUtils.java b/mod-audit-server/src/test/java/org/folio/utils/EntityUtils.java
index 77d8e49..87ba31e 100644
--- a/mod-audit-server/src/test/java/org/folio/utils/EntityUtils.java
+++ b/mod-audit-server/src/test/java/org/folio/utils/EntityUtils.java
@@ -11,12 +11,12 @@
 
 public class EntityUtils {
 
-  public static String TENANT_ID = "diku";
-  public static String PIECE_ID = "2cd4adc4-f287-49b6-a9c6-9eacdc4868e7";
-  public static String ORDER_ID = "a21fc51c-d46b-439b-8c79-9b2be41b79a6";
-  public static String ORDER_LINE_ID = "a22fc51c-d46b-439b-8c79-9b2be41b79a6";
-  public static String INVOICE_ID = "550e8400-e29b-41d4-a716-446655440001";
-  public static String INVOICE_LINE_ID = "550e8400-e29b-41d4-a716-446655440001";
+  public static final String TENANT_ID = "diku";
+  public static final String PIECE_ID = "2cd4adc4-f287-49b6-a9c6-9eacdc4868e7";
+  public static final String ORDER_ID = "a21fc51c-d46b-439b-8c79-9b2be41b79a6";
+  public static final String ORDER_LINE_ID = "a22fc51c-d46b-439b-8c79-9b2be41b79a6";
+  public static final String INVOICE_ID = "550e8400-e29b-41d4-a716-446655440001";
+  public static final String INVOICE_LINE_ID = "550e8400-e29b-41d4-a716-446655440001";
 
   public static OrderAuditEvent createOrderAuditEvent(String id) {
     JsonObject jsonObject = new JsonObject();