diff --git a/core/src/test/java/org/apache/commons/proxy2/interceptor/matcher/argument/ArgumentMatcherUtilsTest.java b/core/src/test/java/org/apache/commons/proxy2/interceptor/matcher/argument/ArgumentMatcherUtilsTest.java
index 9928fe5..87a8f65 100644
--- a/core/src/test/java/org/apache/commons/proxy2/interceptor/matcher/argument/ArgumentMatcherUtilsTest.java
+++ b/core/src/test/java/org/apache/commons/proxy2/interceptor/matcher/argument/ArgumentMatcherUtilsTest.java
@@ -23,6 +23,7 @@
 import org.apache.commons.proxy2.interceptor.matcher.ArgumentMatcher;
 import org.junit.Test;
 
+@SuppressWarnings("boxing") // test code
 public class ArgumentMatcherUtilsTest
 {
     @Test