fix: MagicNumber check disabled in tests

checkstyle.xml

@@ -4,6 +4,9 @@
 	"-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
 	"https://checkstyle.org/dtds/configuration_1_3.dtd">
 <module name="Checker">
+	<module name="SuppressionFilter">
+    	<property name="file" value="suppressions.xml"/>
+	</module>
 	<!-- CheckStyle settings -->
 
 	<module name="TreeWalker">
@@ -67,6 +70,7 @@
 			<property name="ignoreHashCodeMethod" value="false"/>
 			<property name="ignoreAnnotation" value="true"/>
 			<property name="ignoreFieldDeclaration" value="false"/>
+			<!-- Note: affected by /suppressions.xml -->
 		</module>
 
 		<!-- 9: Check parameter number at most 6 -->