diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4053709..a175634 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -59,6 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     strategy:
+      max-parallel: 1
       fail-fast: false
       matrix:
         # list whatever Terraform versions here you would like to support