diff --git a/.github/workflows/claude-wif-test.yaml b/.github/workflows/claude-wif-test.yaml
index 2e392ded07a5..fd7571d2d58f 100644
--- a/.github/workflows/claude-wif-test.yaml
+++ b/.github/workflows/claude-wif-test.yaml
@@ -20,6 +20,8 @@ jobs:
        github.event.comment.author_association == 'OWNER')
     runs-on: arc-runner-set
     timeout-minutes: 10
+    env:
+      HOME: /tmp
     steps:
       - name: Get PR ref
         if: github.event_name == 'issue_comment'
@@ -36,11 +38,6 @@ jobs:
           repository: ${{ steps.pr.outputs.repo || github.repository }}
           persist-credentials: false
 
-      - name: Install Claude Code
-        run: |
-          curl -fsSL https://claude.ai/install.sh | bash
-          echo "$HOME/.local/bin" >> $GITHUB_PATH
-
       - name: Authenticate to GCP via WIF
         uses: google-github-actions/auth@c200f3691d83b41bf9bbd8638997a462592937ed # v2
         with:
@@ -48,6 +45,11 @@ jobs:
           service_account: claude-gha@hosted-control-planes.iam.gserviceaccount.com
           workload_identity_provider: projects/21066242673/locations/global/workloadIdentityPools/itpc-identity-pool/providers/github-com
 
+      - name: Install Claude Code
+        run: |
+          curl -fsSL https://claude.ai/install.sh | bash
+          echo "$HOME/.local/bin" >> $GITHUB_PATH
+
       - name: Test Claude Code
         env:
           CLAUDE_CODE_USE_VERTEX: "1"