diff --git a/.github/workflows/charts-test.yaml b/.github/workflows/charts-test.yaml
index eb5c19b0da7..60dca9c94a2 100644
--- a/.github/workflows/charts-test.yaml
+++ b/.github/workflows/charts-test.yaml
@@ -92,7 +92,7 @@ jobs:
     strategy:
       matrix: ${{ fromJson(needs.generate-install-matrix.outputs.matrix1) }}
       fail-fast: true
-      max-parallel: 15
+      max-parallel: 10
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -135,7 +135,7 @@ jobs:
     strategy:
       matrix: ${{ fromJson(needs.generate-install-matrix.outputs.matrix1) }}
       fail-fast: true
-      max-parallel: 15
+      max-parallel: 5
     runs-on: ubuntu-latest
     steps:
       - name: Checkout