diff --git a/test/test-reconciler-codegen.sh b/test/test-reconciler-codegen.sh
index 151d1321b..c1c35c24b 100755
--- a/test/test-reconciler-codegen.sh
+++ b/test/test-reconciler-codegen.sh
@@ -18,7 +18,9 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-source $(dirname $0)/../vendor/knative.dev/hack/library.sh
+#source $(dirname $0)/../vendor/knative.dev/hack/library.sh
+[[ ! -v REPO_ROOT_DIR ]] && REPO_ROOT_DIR="$(git rev-parse --show-toplevel)"
+readonly REPO_ROOT_DIR
 
 CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${REPO_ROOT_DIR}; ls -d -1 $(dirname $0)/../vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
 KNATIVE_CODEGEN_PKG=${KNATIVE_CODEGEN_PKG:-$(cd ${REPO_ROOT_DIR}; ls -d -1 $(dirname $0)/../vendor/knative.dev/pkg 2>/dev/null || echo ../pkg)}