diff --git a/.github/workflows/mdtf_tests.yml b/.github/workflows/mdtf_tests.yml
index d9bf15586..6a29728f4 100644
--- a/.github/workflows/mdtf_tests.yml
+++ b/.github/workflows/mdtf_tests.yml
@@ -18,19 +18,19 @@ jobs:
     runs-on: ${{matrix.os}}
     strategy:
       matrix:
-        os: [macos-latest]
+        os: [ubuntu-latest, macos-latest]
         json-file: ["tests/github_actions_test_ubuntu_set1.jsonc","tests/github_actions_test_macos_set1.jsonc"]
         json-file-set2: ["tests/github_actions_test_ubuntu_set2.jsonc", "tests/github_actions_test_macos_set2.jsonc"]
         json-file-set3: ["tests/github_actions_test_ubuntu_set3.jsonc", "tests/github_actions_test_macos_set3.jsonc"]
         # if experimental is true, other jobs to run if one fails
         experimental: [false]
         exclude:
-          #- os: ubuntu-latest
-          #  json-file: "tests/github_actions_test_macos_set1.jsonc"
-          #- os: ubuntu-latest
-          #  json-file-set2: "tests/github_actions_test_macos_set2.jsonc"
-          #- os: ubuntu-latest
-          #  json-file-set3: "tests/github_actions_test_macos_set3.jsonc"
+          - os: ubuntu-latest
+            json-file: "tests/github_actions_test_macos_set1.jsonc"
+          - os: ubuntu-latest
+            json-file-set2: "tests/github_actions_test_macos_set2.jsonc"
+          - os: ubuntu-latest
+            json-file-set3: "tests/github_actions_test_macos_set3.jsonc"
           - os: macos-latest
             json-file: "tests/github_actions_test_ubuntu_set1.jsonc"
           - os: macos-latest