diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a0f8fd77..c641ea12 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,7 +33,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     strategy:
       fail-fast: false
-      max-parallel: 4
+      max-parallel: 2
       matrix:
         platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
     steps:
@@ -90,7 +90,7 @@ jobs:
     if: github.event_name == 'push'
     strategy:
       fail-fast: false
-      max-parallel: 4
+      max-parallel: 2
       matrix:
         platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]