diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6fbeddd..7cc16d9 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -55,7 +55,7 @@ jobs:
         with:
           script: |
             const { execSync } = require('child_process');
-            const formulae = execSync('find Formula -name "*.rb" -exec basename {} .rb \\;')
+            const formulae = execSync('find Formula -name "*.rb" ! -name "*@*.rb" -exec basename {} .rb \\;')
               .toString()
               .trim()
               .split('\n');