diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 277bfebb..6f8b4c16 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         os: [ ubuntu-latest ]
         php: [ 7.4 ]
-        stability: [ prefer-lowest, prefer-stable ]
+        stability: [ prefer-stable ]
 
     name: P${{ matrix.php }} - ${{ matrix.stability }} - ${{ matrix.os }}