diff --git a/src/test/java/org/gcube/informationsystem/resourceregistry/instances/SmartgearResourcesTest.java b/src/test/java/org/gcube/informationsystem/resourceregistry/instances/SmartgearResourcesTest.java
index f36ff78..5413e09 100644
--- a/src/test/java/org/gcube/informationsystem/resourceregistry/instances/SmartgearResourcesTest.java
+++ b/src/test/java/org/gcube/informationsystem/resourceregistry/instances/SmartgearResourcesTest.java
@@ -378,9 +378,12 @@ public class SmartgearResourcesTest extends ContextTest {
 
 		OperatingSystemMXBean mxbean = ManagementFactory
 				.getOperatingSystemMXBean();
+		@SuppressWarnings("restriction")
 		com.sun.management.OperatingSystemMXBean sunmxbean = (com.sun.management.OperatingSystemMXBean) mxbean;
+		@SuppressWarnings("restriction")
 		long freeMemory = sunmxbean.getFreePhysicalMemorySize() / 1048576; // in
 																			// MB
+		@SuppressWarnings("restriction")
 		long totalMemory = sunmxbean.getTotalPhysicalMemorySize() / 1048576; // in
 																				// MB