diff --git a/rt/frontend/jaxrs/src/test/java/org/apache/cxf/jaxrs/utils/JAXBUtilsTest.java b/rt/frontend/jaxrs/src/test/java/org/apache/cxf/jaxrs/utils/JAXBUtilsTest.java
index fa418c26cc1..689acd58109 100644
--- a/rt/frontend/jaxrs/src/test/java/org/apache/cxf/jaxrs/utils/JAXBUtilsTest.java
+++ b/rt/frontend/jaxrs/src/test/java/org/apache/cxf/jaxrs/utils/JAXBUtilsTest.java
@@ -51,7 +51,7 @@ private void correctValueType(Class<?> clazz) {
         Assert.assertEquals(String.class, valueType);
     }
 
-    public class CustomerDetailsWithExtendedAdapter {
+    public static class CustomerDetailsWithExtendedAdapter {
         @NotNull
         @QueryParam("birthDate")
         @XmlJavaTypeAdapter(LocalDateXmlAdapter.class)
@@ -66,7 +66,7 @@ public void setBirthDate(LocalDate birthDate) {
         }
     }
 
-    public class CustomerDetailsWithSimpleAdapter {
+    public static class CustomerDetailsWithSimpleAdapter {
         @NotNull
         @QueryParam("birthDate")
         @XmlJavaTypeAdapter(LocalDateAdapter.class)