diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 827b5e7..f05a240 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,9 +14,9 @@ jobs:
       matrix:
         ruby: ['2.7', '2.6', '2.4']
         redmine: ['4.0-stable', '4.1-stable', 'master']
-        exclude:
+        include:
           - ruby: '2.7'
-            redmine: ['4.0-stable', '4.1-stable']
+            redmine: 'master'
       fail-fast: false
 
     services: