diff --git a/openshift/e2e-common.sh b/openshift/e2e-common.sh
index 80ea4ed93716..b6fdbe5d7f1e 100644
--- a/openshift/e2e-common.sh
+++ b/openshift/e2e-common.sh
@@ -206,7 +206,7 @@ function install_catalogsource(){
   # And checkout the setup script based on that commit.
   local SERVERLESS_DIR=$(mktemp -d)
   local CURRENT_DIR=$(pwd)
-  git clone --depth 1 https://github.com/openshift-knative/serverless-operator.git ${SERVERLESS_DIR}
+  git clone --branch release-1.15 --depth 1 https://github.com/openshift-knative/serverless-operator.git ${SERVERLESS_DIR}
   pushd ${SERVERLESS_DIR}
 
   update_csv $CURRENT_DIR || return $?