diff --git a/SOL005/NSLifecycleManagement-API/NSLCMOperationKeywords.robot b/SOL005/NSLifecycleManagement-API/NSLCMOperationKeywords.robot
index 336673eb73fed5ec24a0c95cd6a15542b1264ae3..400162cb1a1d4d04465869e5176278ade4a1170e 100644
--- a/SOL005/NSLifecycleManagement-API/NSLCMOperationKeywords.robot
+++ b/SOL005/NSLifecycleManagement-API/NSLCMOperationKeywords.robot
@@ -1,5 +1,5 @@
 *** Settings ***
-Resource    environment/variables.txt
+Resource   environment/variables.txt
 Library    REST     ${NFVO_SCHEMA}://${NFVO_HOST}:${NFVO_PORT}
 Library    JSONLibrary
 Library    Process
@@ -556,7 +556,7 @@ GET NS LCN OP Occurences Invalid attribute-based filtering parameters
     Log    Query status information about multiple NS lifecycle management operation occurrences.
 	Set Headers  {"Accept":"${ACCEPT}"}  
 	Run Keyword If    ${AUTH_USAGE} == 1    Set Headers    {"Authorization":"${AUTHORIZATION}"} 
-	GET    ${apiRoot}/${apiName}/${apiVersion}/ns_lcm_op_occs?attribute_not_exist=some_value
+	GET    ${apiRoot}/${apiName}/${apiVersion}/ns_lcm_op_occs?${NEG_FILTER}
 	${outputResponse}=    Output    response
 	Set Global Variable    @{response}    ${outputResponse}
 	
@@ -564,7 +564,7 @@ GET NS LCN OP Occurences Invalid attribute selector
     Log    Query NS The GET method queries information about multiple NS instances.
     Set Headers  {"Accept":"${ACCEPT}"}  
 	Run Keyword If    ${AUTH_USAGE} == 1    Set Headers    {"Authorization":"${AUTHORIZATION}"} 
-	GET    ${apiRoot}/${apiName}/${apiVersion}/ns_lcm_op_occs?fields=wrong_field
+	GET    ${apiRoot}/${apiName}/${apiVersion}/ns_lcm_op_occs?${NEG_SELECTOR}
 	${outputResponse}=    Output    response
 	Set Global Variable    @{response}    ${outputResponse}
 
diff --git a/SOL005/NSLifecycleManagement-API/environment/variables.txt b/SOL005/NSLifecycleManagement-API/environment/variables.txt
index 47a4c6464d0426c80e1ad16f5a8de55e7bb2fa7f..dc3f6467e5275c7a1e65a11f979e0aa319f5630e 100644
--- a/SOL005/NSLifecycleManagement-API/environment/variables.txt
+++ b/SOL005/NSLifecycleManagement-API/environment/variables.txt
@@ -54,3 +54,6 @@ ${response}    {}
 
 ${Etag}=    an etag
 ${Etag_modified}=    a modified etag
+
+${NEG_FILTER}    attribute_not_exist=some_value
+${NEG_SELECTOR}    fields=wrong_field
\ No newline at end of file