diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 003f98a..2e7c3b5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
       # Default value means that a failure in one OS cancels all 
       fail-fast: false
       matrix:
-        smalltalk: [ Pharo64-11 ]
+        smalltalk: [ Pharo64-11, Pharo64-12, Pharo64-13 ]
         os: [ ubuntu-latest ] # macos-latest, windows-latest
         ston: [ .ci.ston ]
     runs-on: ${{ matrix.os }}