diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index b11f547..853438f 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -23,7 +23,9 @@ jobs:
           - os: macos-latest
             toolchain: {compiler: intel-classic, version: '2021.9'}
           - os: ubuntu-latest
-            toolchain: {compiler: intel, version: '2023.1'}
+            toolchain: 
+              - {compiler: intel, version: '2023.1'}
+              - {compiler: intel-classic, version: '2021.9'}
 
     steps:
       - uses: awvwgk/setup-fortran@v1