diff --git a/Python/stress-testing/config.py b/Python/stress-testing/config.py
index 39a10cf1446696fd220490e9a7c249feb4e9f71b..9537ba758efe1a3e40c101e62083d838233edb82 100644
--- a/Python/stress-testing/config.py
+++ b/Python/stress-testing/config.py
@@ -1,5 +1,6 @@
 import datetime
 
+
 class Config:
     """App configuration."""
 
@@ -11,15 +12,17 @@ class Config:
     )
 
     # 50 notiftestxx users were created
-    NOTIFTEST_USERS = ['notiftest' + f"{i:02d}" for i in range(1, 51)]
+    NOTIFTEST_USERS = ["notiftest" + f"{i:02d}" for i in range(1, 51)]
     # 5 Grappa groups created, containing 10 notiftestxx users each
-    NOTIFTEST_GROUPS = ['group-notiftest' + f"{i:02d}" for i in range(1, 6)]
+    NOTIFTEST_GROUPS = ["group-notiftest" + f"{i:02d}" for i in range(1, 6)]
 
     # Random 'unverified email users' to add more members
-    UNVERIFIED_USERS = ['bill.gates.vaccines.5G.' + f"{i:05d}" + '@ffp.club' for i in range(1, 40000)]
+    UNVERIFIED_USERS = [
+        "bill.gates.vaccines.5G." + f"{i:05d}" + "@ffp.club" for i in range(1, 40000)
+    ]
 
     # Tags
-    TAGS = ['tag.' + f"{i:02d}" for i in range(1, 41)]
+    TAGS = ["tag." + f"{i:02d}" for i in range(1, 41)]
 
     PROBE_USERS = [
         "probe000@cern.ch",
@@ -86,3 +89,392 @@ class Config:
         "probe901@cern.ch",
     ]
 
+    RANDOM_GROUPS = [
+        "aaa-tchoum",
+        "aaa-tchoum2",
+        "ab-rf-testgroupmanager",
+        "ab-rf-testgroupmanager1",
+        "account-management-developers",
+        "account-management-view-groups",
+        "active-directory-git",
+        "active-directory-users",
+        "adfs-notifications",
+        "afs-egroups-test-nested",
+        "afs-resource-users",
+        "ais-users",
+        "all-mpe",
+        "alumni-developers",
+        "alumni-fw-test",
+        "ap-college-18-it",
+        "ap-it-members",
+        "ap-it-staff",
+        "ap-members-all",
+        "ap-vote-46-55",
+        "asdf-members",
+        "assign-m365-a5-automatic",
+        "assign-msdnvisualstudiopro",
+        "assign-o365-cda",
+        "assign-o365-forms",
+        "atools-gdi-customers",
+        "atools-gi-customers",
+        "ats-basic-users",
+        "authorization-service-applications-readers",
+        "authorization-service-applications-users",
+        "authorization-service-groups-readers",
+        "authorization-service-groups-users",
+        "authorization-service-identity-readers",
+        "authorization-service-security-team",
+        "authorization-service-service-desk",
+        "authz-svc-accounts-to-sync",
+        "authzsvc-contributors",
+        "authzsvc-developers",
+        "authzsvc-many-recursive-groups",
+        "authzsvc-resources-devs",
+        "azure-mgmt",
+        "bike-2-work",
+        "bike-2-work-meyrin",
+        "blocked-for-security-reasons",
+        "bogus-users",
+        "c1",
+        "c3",
+        "ca-allowed-cern-user-certificate",
+        "ca-allowed-code-signing-certificate",
+        "ca-allowed-enrollment-agent-certificate",
+        "ca-allowed-user-certificate",
+        "ca-allowed-user-certificate-exceptions",
+        "ca-allowed-user-certificate-extn",
+        "ca-allowed-user-certificate-mp",
+        "ca-development",
+        "catering-survey-fr",
+        "cda-microservices-database",
+        "centrallymanagedwindows11users-users",
+        "cern-academic-training-program",
+        "cern-accounts-primary",
+        "cern-active-users",
+        "cern-all-users",
+        "cernbox-canary-users",
+        "cernbox-project-account-management-docs-readers",
+        "cernbox-project-account-management-docs-writers",
+        "cernbox-project-adfs2016-documentation-readers",
+        "cernbox-project-adfs2016-documentation-writers",
+        "cernbox-project-authorization-service-readers",
+        "cernbox-project-authorization-service-writers",
+        "cernbox-project-cdaweb-readers",
+        "cernbox-project-cdaweb-writers",
+        "cernbox-project-discourse-archives-readers",
+        "cernbox-project-discourse-archives-writers",
+        "cernbox-project-egroups-archives-readers",
+        "cernbox-project-egroups-archives-writers",
+        "cernbox-project-mexit-readers",
+        "cernbox-project-mexit-writers",
+        "cernbox-project-pns-archives-readers",
+        "cernbox-project-pns-archives-writers",
+        "cernbox-project-resource-management-docs-readers",
+        "cernbox-project-resource-management-docs-writers",
+        "cernbox-service-users",
+        "cernbox-users",
+        "cernca-eligible-users",
+        "cern-ca-robots-accounts",
+        "cern-ca-smartcard-pilot",
+        "CERN-Direct-Employees",
+        "cern-eosc-direct",
+        "cern-fr-staff",
+        "cern-mac-users",
+        "cernmssql-notification",
+        "cern-non-active-users",
+        "cern-notifications",
+        "cernois-es",
+        "cern-personnel-comm-fr",
+        "cern-personnel-meyrin",
+        "cernphone-users",
+        "cern-sci",
+        "cernsearch-users",
+        "cern-solid",
+        "cern-staff",
+        "cern-status-staf",
+        "cernts-tsgateway-allowednonprimaryaccount",
+        "cern-visitor-guarantors-mp",
+        "cg",
+        "chep-info",
+        "chis-membersf",
+        "chis-obligatoires",
+        "c-l-o",
+        "cloud-infrastructure-users",
+        "cloud-licence-office",
+        "cmf-qry-centrallymanagedwindows10users-users",
+        "cmf-qry-libreofficeusersallcmfactive3m-users",
+        "cmf-qry-msaccessusersallcmfactive3m-users",
+        "cmf-qry-msofficeusersallcmfactive3m-users",
+        "cmf-qry-msonenoteusersallcmfactive3m-users",
+        "cmf-qry-msprojectusersallcmfactive3m-users",
+        "cmf-qry-mssfbusersallcmfactive3m-users",
+        "cmf-qry-msvisiousersallcmfactive3m-users",
+        "cmf-qry-mswordexcelpowerpointusersallcmfactive3m-users",
+        "cmf-qry-onlyofficedesktopusersallcmfactive3m-users",
+        "cmf-qry-windows10and11usersinit-users",
+        "cmf-qry-windows10and11usersinniceandpch-users",
+        "cmf-qry-windows10onlyinitusers-users",
+        "cmf-qry-windows10onlyinniceandpchusers-users",
+        "cmf-qry-windows10onlyuserscmcmf-users",
+        "cmf-qry-windows11onlyinitusers-users",
+        "cmf-qry-windows11onlyinniceandpchusers-users",
+        "cmf-qry-windowsusersitcmcmf-users",
+        "cmf-reporting-access",
+        "cmf-support",
+        "cnic-users-exchange",
+        "computer-security-drill-2020",
+        "computing-blog",
+        "computing-blog-update",
+        "computing-groups",
+        "computing-groups-review",
+        "cp",
+        "cta-lst",
+        "cw",
+        "dbondemand-users",
+        "dcaccess-devicesapplications",
+        "def-cg",
+        "deliver-messages-junk",
+        "demo-group",
+        "desktop-services-technical-meeting",
+        "developers-forum-contacts",
+        "dfs-denied-users",
+        "dfs-home-dir-mac-users",
+        "documentation-project",
+        "dppo-policy",
+        "ds",
+        "dynamic-grappa-test",
+        "edms-users",
+        "e-group-soap-users",
+        "elg-cern",
+        "email-campaign",
+        "emergency-guides-b28",
+        "env-grid",
+        "eo-rulegroup",
+        "espg-submission",
+        "es-timber-sso_kibana",
+        "es-timber-sso_kibana_rw",
+        "es-timber-wininfra_kibana",
+        "event-chep09-interest",
+        "eventlog-development",
+        "farewell-27feb2020-cern-it",
+        "farewell-reminder",
+        "fax-candidates",
+        "fax-users",
+        "fax-users-test",
+        "federatedidentity-members",
+        "francais1-au-cern",
+        "g4",
+        "ge",
+        "gl",
+        "glide-sso-sync",
+        "gm",
+        "group-notiftest01",
+        "group-notiftest02",
+        "group-notiftest03",
+        "group-notiftest04",
+        "group-notiftest05",
+        "groups-to-sync-authorization-service",
+        "groups-to-sync-authorization-service-dev",
+        "hepix2008-speakers",
+        "holidays-to-calendar",
+        "identity-management-firstline",
+        "identity-management-servicedesk",
+        "ignore-members",
+        "info-newphysics-workshop",
+        "info-rota-is",
+        "iota-ca-certificates",
+        "it",
+        "it-carpool-users",
+        "it-cda-microsoft-newsletters",
+        "it-dep-ca-ges-temporary",
+        "it-dep-ca-temporary",
+        "it-dep-cda",
+        "it-dep-cda-cristi-master",
+        "it-dep-cda-ct-restr",
+        "it-dep-cda-former",
+        "it-dep-cda-plng",
+        "it-dep-cda-vb",
+        "it-dep-dynamic",
+        "it-dep-fas-select-afc-2014-2",
+        "it-dep-fas-select-afc-2016-1",
+        "it-dep-fas-select-afc-2017-1",
+        "it-dep-fas-select-afc-2017-2",
+        "it-dep-fas-select-afc-2018-1",
+        "it-dep-fas-select-afc-2018-2",
+        "it-dep-fas-select-afc-2019-1",
+        "it-dep-fas-select-afc-2019-2",
+        "it-dep-fas-select-afc-2020-1",
+        "it-dep-fas-select-afc-2022-2",
+        "it-dep-fas-select-fct-2018",
+        "it-dep-fas-select-pjas-2019",
+        "it-dep-fas-select-pjas-2019-1",
+        "it-dep-fas-select-pjas-2019-2",
+        "it-dep-fas-select-tsc-2014-2",
+        "it-dep-fas-select-tsc-2014-3",
+        "it-dep-fas-select-tsc-2016-1",
+        "it-dep-fas-select-tsc-2017-1",
+        "it-dep-fas-select-tsc-2017-2",
+        "it-dep-fas-select-tsc-2018-1",
+        "it-dep-fas-select-tsc-2018-2",
+        "it-dep-fas-select-tsc-2019-1",
+        "it-dep-fas-select-tsc-2019-2",
+        "it-dep-fas-select-tsc-2020-1",
+        "it-dep-fas-select-tsc-2022-2",
+        "it-dep-fas-select-via-2018",
+        "it-dep-full-dynamic",
+        "it-dep-is",
+        "it-dep-ois-in",
+        "it-dep-ois-operations",
+        "it-dep-ois-rota-4th-line-support",
+        "it-dep-ois-rota-accountmanagement-support",
+        "it-dep-ois-rota-drupal",
+        "it-dep-ois-rota-infrastructure-support",
+        "it-dep-ois-rota-mac-support",
+        "it-dep-ois-rota-mail-support",
+        "it-dep-ois-rota-support",
+        "it-dep-ois-rota-web-support",
+        "it-dep-ois-rota-windows-support",
+        "it-dep-phonebook-feedback",
+        "it-dep-safety-sf31",
+        "it-dep-staff",
+        "it-dept",
+        "it-ext",
+        "it-external-staff",
+        "it-internal-staff",
+        "it-is-ilm",
+        "it-mac-users",
+        "it-service-subdomain",
+        "it-snow-fms-supporters",
+        "it-sw-ad-accs5-mac",
+        "it-sw-ad-ae-cs5-win",
+        "it-sw-ad-ae-cs6-win",
+        "it-sw-ad-afcs5-mac",
+        "it-sw-ad-ape-cs4",
+        "it-sw-ad-drcs5-mac",
+        "it-sw-ad-fb-p4",
+        "it-sw-ad-fp-cs5",
+        "it-sw-ad-fpcs5-mac",
+        "it-sw-ad-fp-cs5-win",
+        "it-sw-ad-fw-cs6-mac",
+        "it-sw-ad-fw-cs6-win",
+        "it-sw-ad-id-cs6-win",
+        "it-sw-ad-il-cc-win-device",
+        "it-sw-ad-il-cs5",
+        "it-sw-ad-ilcs5-mac",
+        "it-sw-ad-il-cs6-win",
+        "it-sw-ad-in-cs4",
+        "it-sw-ad-incs5-mac",
+        "it-sw-ad-lr-5-win",
+        "it-sw-ad-mc-cs5",
+        "it-sw-ad-prcs5-mac",
+        "it-sw-ad-pr-cs5-win",
+        "it-sw-ad-pr-cs6-win",
+        "it-sw-ad-ps-cs4",
+        "it-sw-ad-ps-cs5",
+        "it-sw-ad-pscs5-mac",
+        "it-sw-ad-ps-cs6-mac",
+        "it-sw-ad-ps-cs6-win",
+        "it-sw-apple-server",
+        "it-sw-mac-ad-all-read",
+        "it-sw-mac-all-read",
+        "it-sw-mac-apple-all-read",
+        "ktab-installers",
+        "kuri-kuri",
+        "lhcb-drinks-bbq-invitees",
+        "li",
+        "license-soft",
+        "liveqa-access",
+        "log-shipping-and-search-service-participants",
+        "lxplus-authorized-users",
+        "lync-subscription",
+        "lync-support",
+        "mail-denied-users",
+        "malt-ds-contributors",
+        "malt-iam",
+        "malt-mail-tf",
+        "malt-project",
+        "malt-project-site-editors",
+        "malt-workspaces",
+        "mattermost-team",
+        "members-hr-summ-requestor",
+        "microservices-openshift-templates",
+        "ms-tam-newsletter",
+        "ms-tam-security-alerts",
+        "msvisio-alt-cda",
+        "nationality-all-fr",
+        "nationality-fr-cern",
+        "nes-tor",
+        "nice-support",
+        "notifications-dev-users",
+        "notifications-noreply",
+        "notifications-qa-users",
+        "notifications-service-supporters",
+        "notifications-test",
+        "oc2-exceptional-it-dep",
+        "occupants-bldg-28",
+        "occupants-bldg-28-floor-1",
+        "od2013-volunteercoordination",
+        "pacs-egroup-test-cernpriv",
+        "pawel-mail-test1",
+        "pki-developers",
+        "pkinit-blacklist",
+        "poll-respondents",
+        "push-devteam",
+        "remedy-authorized-users",
+        "remedy-user",
+        "remedy-users",
+        "room-booking-users",
+        "sc-stakeholders",
+        "search-codimd",
+        "secondary-identities",
+        "senior-staff",
+        "service-abuse-spamfighters",
+        "service-identities",
+        "service-windows-pss",
+        "snow-info-survey",
+        "snow-itssb",
+        "snow-it-supporters",
+        "snow-it-users",
+        "snow-news-membersd",
+        "snow-rqf-dfs-mail",
+        "snow-users",
+        "spam-report",
+        "sso-developers",
+        "staff-all",
+        "staff-cat1and2",
+        "support-windows-servers",
+        "support-windows-servers-dev",
+        "survey-citymobil",
+        "svn-it-ois",
+        "test-csharp-3",
+        "test-csharp-4",
+        "test-groupv2",
+        "test-hannah-slave-placeholders",
+        "test-mersi-meyr",
+        "test-potato",
+        "test-sl-dynamic",
+        "test-synchro-2-dyn",
+        "test-ttt",
+        "test-ttt2",
+        "un",
+        "unlimited-accounts",
+        "ux-assets-users",
+        "vc-all-users",
+        "vc-users-cernmailservices",
+        "vc-users-it-ois",
+        "vc-users-vssvntest",
+        "virtual-smartcard-users",
+        "webservices-denied-users",
+        "wg-retc",
+        "windowsdesktops-denied-users",
+        "windows-notifications-onlyw10-users",
+        "windows-notifications-onlyw11-users",
+        "windows-notifications-w10w11-users",
+        "windows-security",
+        "windows-servers-infra",
+        "wlcg-iam-supporters",
+        "wlcg-security-fedid-pilot-wg",
+        "xmas-party-invitation",
+        "xwho-power-users",
+        "zg",
+    ]
diff --git a/Python/stress-testing/stress_testing.py b/Python/stress-testing/stress_testing.py
index 190ab830af2db21246e4267e5a5ecb8d87b794ea..4a6bf0afdfde9e1062e75b0cf631b852321a75d1 100644
--- a/Python/stress-testing/stress_testing.py
+++ b/Python/stress-testing/stress_testing.py
@@ -66,6 +66,19 @@ def add_users_to_channel(ucnl, channel_id, verbose, startatcountusers, countuser
             print("\tGroup already exists")
         pass
 
+    # Add several RANDOM grappa group as member
+    for cptgroup in range(0, len(Config.RANDOM_GROUPS)):
+        try:
+            add_group_to_channel(
+                channel_id,
+                Config.RANDOM_GROUPS[cptgroup],
+                verbose
+            )
+        except FileExistsError as ex:
+            if verbose:
+                print("\tGroup already exists")
+            pass
+
     # Add notiftest users as member, except the ones in the group added above
     for ucpt in range(startatcountusers, countusers):
         try: