diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 4d26bc42ba1..7ee77ee18e3 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -36,7 +36,7 @@ jobs:
           - TEST_NAME: "Force DEncode and MySQL8"
             ARGS: DIRAC_USE_JSON_ENCODE=NO MYSQL_VER=mysql:8.0.40
           - TEST_NAME: "Backward Compatibility"
-            ARGS: CLIENT_INSTALLATION_BRANCH=rel-v8r0 PILOT_INSTALLATION_BRANCH=rel-v8r0
+            ARGS: CLIENT_INSTALLATION_BRANCH=rel-v9r0 PILOT_INSTALLATION_BRANCH=rel-v9r0
           - TEST_NAME: "Test DiracX latest"
             ARGS: TEST_DIRACX=Yes
 
diff --git a/integration_tests.py b/integration_tests.py
index f46b8c7c5b6..96b4a8d1b39 100755
--- a/integration_tests.py
+++ b/integration_tests.py
@@ -738,7 +738,7 @@ def _check_containers_running(*, is_up=True):
 
 def _find_dirac_release():
     # Start by looking for the GitHub/GitLab environment variables
-    if "GITHUB_BASE_REF" in os.environ:  # this will be "rel-v8r0"
+    if "GITHUB_BASE_REF" in os.environ:  # this will be "rel-v9r0"
         return os.environ["GITHUB_BASE_REF"]
     if "CI_COMMIT_REF_NAME" in os.environ:
         return os.environ["CI_COMMIT_REF_NAME"]
diff --git a/tests/CI/install_client.sh b/tests/CI/install_client.sh
index 324902c4868..a1fa7081746 100755
--- a/tests/CI/install_client.sh
+++ b/tests/CI/install_client.sh
@@ -54,11 +54,6 @@ echo -e "*** $(date -u) **** Got the DIRAC tests ****\n"
 
 source "${DIRAC_CI_SETUP_SCRIPT}"
 
-if [[ -n "${INSTALLATION_BRANCH}" ]]; then
-    # shellcheck disable=SC2034
-    DIRACSETUP=$(< "${INSTALL_CFG_FILE}" grep "Setup = " | cut -f5 -d " ")
-fi
-
 echo -e "*** $(date -u) **** Client INSTALLATION START ****\n"
 
 installDIRAC
diff --git a/tests/Jenkins/utilities.sh b/tests/Jenkins/utilities.sh
index 2a020e578e7..c9bdb9929d2 100644
--- a/tests/Jenkins/utilities.sh
+++ b/tests/Jenkins/utilities.sh
@@ -325,12 +325,7 @@ installDIRAC() {
     configureArgs+=("--LegacyExchangeApiKey=diracx:legacy:InsecureChangeMe")
   fi
 
-  if [[ -n "${INSTALLATION_BRANCH}" ]]; then
-    # Use this for (e.g.) running backward-compatibility tests
-    cmd="dirac-configure -S ${DIRACSETUP} -C ${CSURL} --SkipCAChecks "${configureArgs[@]}" ${CONFIGUREOPTIONS} ${DEBUG}"
-  else
-    cmd="dirac-configure -C ${CSURL} --SkipCAChecks ${CONFIGUREOPTIONS} ${DEBUG}"
-  fi
+  cmd="dirac-configure -C ${CSURL} --SkipCAChecks ${CONFIGUREOPTIONS} ${DEBUG}"
   if ! bash -c "${cmd}"; then
     echo 'ERROR: dirac-configure failed' >&2
     exit 1