diff --git a/resources/ApiUtils/ContextInformationSubscription.resource b/resources/ApiUtils/ContextInformationSubscription.resource
index 57eae735a388d867815916e1c223b4a5d3dc561b..38a5fa934f1ecc08ccedd945c0d2800515b074b1 100755
--- a/resources/ApiUtils/ContextInformationSubscription.resource
+++ b/resources/ApiUtils/ContextInformationSubscription.resource
@@ -16,6 +16,7 @@ ${CONTENT_TYPE_LD_JSON}             application/ld+json
 ${ERROR_TYPE_BAD_REQUEST_DATA}      https://uri.etsi.org/ngsi-ld/errors/BadRequestData
 ${ERROR_TYPE_INVALID_REQUEST}       https://uri.etsi.org/ngsi-ld/errors/InvalidRequest
 ${ERROR_TYPE_RESOURCE_NOT_FOUND}    https://uri.etsi.org/ngsi-ld/errors/ResourceNotFound
+${ERROR_TYPE_ALREADY_EXISTS}        https://uri.etsi.org/ngsi-ld/errors/AlreadyExists
 
 ${response}                         ${EMPTY}
 
@@ -113,7 +114,7 @@ Query Subscriptions
     RETURN    ${response}
 
 Retrieve Subscription
-    [Arguments]    ${id}    ${accept}=${EMPTY}    ${context}=${EMPTY}    ${content_type}=${CONTENT_TYPE_LD_JSON}
+    [Arguments]    ${id}    ${accept}=${EMPTY}    ${context}=${EMPTY}    ${content_type}=${CONTENT_TYPE_JSON}
 
     &{headers}=    Create Dictionary    Content-Type=${content_type}
     IF    '${accept}'!=''