diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 9fbaf9a..e1358c3 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [2.7, '3.0', 3.1. 3.2]
+        ruby-version: [2.7, '3.0', 3.1, 3.2]
     steps:
       - uses: actions/checkout@v2
       - name: Set up Ruby ${{ matrix.ruby-version }}