diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 377ab42..93b5659 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [8.1, 8.0]
+        php: [8.1, 8.0, 7.4]
 
     name: PHP${{ matrix.php }}