diff --git a/.github/workflows/lint-test.yaml b/.github/workflows/lint-test.yaml
index c3cfc367fe10..de10d34ccbec 100644
--- a/.github/workflows/lint-test.yaml
+++ b/.github/workflows/lint-test.yaml
@@ -18,17 +18,17 @@ jobs:
 
       - uses: actions/setup-python@v4
         with:
-          python-version: 3.7
+          python-version: '3.7'
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.4.0
+        uses: helm/chart-testing-action@v2.6.1
 
       - name: Run chart-testing (list-changed)
         id: list-changed
         run: |
-          changed=$(ct list-changed --config .github/linters/ct.yaml)
+          changed="$(ct list-changed --config .github/linters/ct.yaml)"
           if [[ -n "$changed" ]]; then
-            echo "changed=true" >> $GITHUB_OUTPUT
+            echo "changed=true" >> "$GITHUB_OUTPUT"
           fi
 
       # - name: install helm unittest plugin