diff --git a/.github/workflows/cts.yaml b/.github/workflows/cts.yaml
index 6f04f3452..da250e6eb 100644
--- a/.github/workflows/cts.yaml
+++ b/.github/workflows/cts.yaml
@@ -24,6 +24,7 @@ jobs:
           - "v1.25.0"
           - "v1.26.0"
           - "v1.27.0"
+          - "v1.28.0"
     steps:
       - if: matrix.kubernetes-env == 'k3s'
         run: |