diff --git a/.github/labeler.yml b/.github/labeler.yml
index 3a21673da02..55eed632fa8 100644
--- a/.github/labeler.yml
+++ b/.github/labeler.yml
@@ -1,4 +1,4 @@
 # Add 'alsoTargeting:integration' label to any changes within the entire repository
-"alsoTargeting:integration":
+"alsoTargeting:rel-v9r0":
   - changed-files:
-      - any-glob-to-any-file: '**'
+      - any-glob-to-any-file: "**"
diff --git a/integration_tests.py b/integration_tests.py
index 34961ac080d..88d71e75a0e 100755
--- a/integration_tests.py
+++ b/integration_tests.py
@@ -21,7 +21,7 @@
 from typer import colors as c
 
 # Editable configuration
-DEFAULT_HOST_OS = "cc7"
+DEFAULT_HOST_OS = "el9"
 DEFAULT_MYSQL_VER = "mysql:8.4.4"
 DEFAULT_ES_VER = "elasticsearch:7.9.1"
 DEFAULT_IAM_VER = "indigoiam/iam-login-service:v1.10.2"
@@ -112,7 +112,7 @@ def list_commands(self, ctx):
   MYSQL_VER: {DEFAULT_MYSQL_VER!r}
   ES_VER: {DEFAULT_ES_VER!r}
   IAM_VER: {DEFAULT_IAM_VER!r}
-  {(os.linesep + '  ').join(['%s: %r' % x for x in FEATURE_VARIABLES.items()])}
+  {(os.linesep + "  ").join(["%s: %r" % x for x in FEATURE_VARIABLES.items()])}
 
 All features can be prefixed with "SERVER_" or "CLIENT_" to limit their scope.
 
diff --git a/tests/CI/README.MD b/tests/CI/README.MD
index e1cc568931e..e33e8410dbb 100644
--- a/tests/CI/README.MD
+++ b/tests/CI/README.MD
@@ -22,7 +22,7 @@ The command `docker-compose -f tests/CI/docker-compose.yml down -v` stops and re
 
 ### System requirements
 
-The officially supported operating system is CERN Centos 7 ([CC7](http://linux.web.cern.ch/linux/centos7/)), should you use another Linux distribution, please install the dependencies according to your distribution.
+The officially supported operating system is EL8.
 
 The following dependencies/softwares are required:
 * Docker v18+ (lower version should work, but no promises are made).