diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index f3772e62f6..dc40b74ffc 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -85,6 +85,7 @@ jobs:
             cmake_opts: '-DBUILD_SHARED_LIBS=ON -DAXOM_QUEST_ENABLE_EXTRA_REGRESSION_TESTS:BOOL=ON -U CALIPER_DIR -U ADIAK_DIR'
             do_build: 'yes'
             do_benchmarks: 'no'
+      max-parallel: 5
     name: ${{ matrix.build_type }} - ${{ matrix.config.job_name }}
     container:
       image: ${{ matrix.config.compiler_image }}
diff --git a/.github/workflows/test_windows_tpls.yml b/.github/workflows/test_windows_tpls.yml
index 4ac42495d9..a1706bbf2a 100644
--- a/.github/workflows/test_windows_tpls.yml
+++ b/.github/workflows/test_windows_tpls.yml
@@ -26,6 +26,7 @@ jobs:
         - arch: "x86"
           triplet: "x86-windows"
           msvc:    "2022"
+      max-parallel: 2
 
     steps:
     - name: Checkout repo w/ submodules