diff --git a/SOL005/NSDManagement-API/NSDescriptors.robot b/SOL005/NSDManagement-API/NSDescriptors.robot
index 243112559e6421c062c42259180df93eb8555e8b..3da740a6d2a00f1cb8f5e578b5e3278f5df6cc2b 100644
--- a/SOL005/NSDManagement-API/NSDescriptors.robot
+++ b/SOL005/NSDManagement-API/NSDescriptors.robot
@@ -5,6 +5,7 @@ Resource          environment/generic.txt    # Generic Parameters
 Resource          environment/nsDescriptors.txt    # Specific nsDescriptors Parameters
 Library           JSONLibrary
 Library           REST    ${NFVO_SCHEMA}://${NFVO_HOST}:${NFVO_PORT}
+Library           OperatingSystem
 
 *** Test Cases ***
 GET all Network Service Descriptors