diff --git a/.github/workflows/_e2e_nightly_single_node.yaml b/.github/workflows/_e2e_nightly_single_node.yaml
index bf6062a6..4d07e031 100644
--- a/.github/workflows/_e2e_nightly_single_node.yaml
+++ b/.github/workflows/_e2e_nightly_single_node.yaml
@@ -126,6 +126,9 @@ jobs:
       - name: Install Ascend toolkit & triton_ascend
         shell: bash -l {0}
         run: |
+          apt-get update && apt-get -y install clang-15
+          update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
+          update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20
           BISHENG_NAME="Ascend-BiSheng-toolkit_aarch64_20260105.run"
           BISHENG_URL="https://vllm-ascend.obs.cn-north-4.myhuaweicloud.com/vllm-ascend/${BISHENG_NAME}"
           wget -O "${BISHENG_NAME}" "${BISHENG_URL}" && chmod a+x "${BISHENG_NAME}" && "./${BISHENG_NAME}" --install && rm "${BISHENG_NAME}"
diff --git a/.github/workflows/_e2e_nightly_single_node_models.yaml b/.github/workflows/_e2e_nightly_single_node_models.yaml
index 3ba102d8..b813a490 100644
--- a/.github/workflows/_e2e_nightly_single_node_models.yaml
+++ b/.github/workflows/_e2e_nightly_single_node_models.yaml
@@ -107,7 +107,7 @@ jobs:
       - name: Install Ascend toolkit & triton_ascend
         shell: bash -l {0}
         run: |
-          apt-get -y install clang-15
+          apt-get update && apt-get -y install clang-15
           update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
           update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20          
           BISHENG_NAME="Ascend-BiSheng-toolkit_aarch64_20260105.run"
diff --git a/tests/e2e/nightly/multi_node/scripts/run.sh b/tests/e2e/nightly/multi_node/scripts/run.sh
index 229dc2a3..1e08a6dc 100644
--- a/tests/e2e/nightly/multi_node/scripts/run.sh
+++ b/tests/e2e/nightly/multi_node/scripts/run.sh
@@ -127,7 +127,7 @@ install_extra_components() {
 
 install_triton_ascend() {
     echo "====> Installing triton_ascend"
-    apt-get install -y clang-15
+    apt-get update && apt-get install -y clang-15
     update-alternatives --install /usr/bin/clang clang /usr/bin/clang-15 20
     update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 20
     clang -v