diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 400b69fa..0314ee9f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,9 +11,31 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # os: [ ubuntu-20.04, macos-latest ]
         os: [ ubuntu-20.04 ]
         smalltalk: [ 3.5.3, 3.5.8, 3.6.0, 3.6.4, 3.6.5, 3.6.6, 3.7.0 ]
+        include:
+          - smalltalk: 3.7.0
+            os: ubuntu-22.04
+          - smalltalk: 3.7.0
+            os: macos-13
+          - smalltalk: 3.7.0
+            os: macos-12
+          - smalltalk: 3.7.0
+            os: macos-11
+          - smalltalk: 3.6.6
+            os: ubuntu-22.04
+          - smalltalk: 3.6.6
+            os: macos-13
+          - smalltalk: 3.6.6
+            os: macos-12
+          - smalltalk: 3.6.6
+            os: macos-11
+          - smalltalk: 3.6.5
+            os: macos-11
+          - smalltalk: 3.6.4
+            os: macos-11
+          - smalltalk: 3.5.8
+            os: macos-11
     runs-on: ${{ matrix.os }}
     env:
       GS_VERS: ${{ matrix.smalltalk }}