diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 24328c08..5bcdb661 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -44,20 +44,15 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-20.04
-            CC: gcc-7
-            CXX: g++-7
-            ruby: '2.5'
-            PackageDeps: g++-7
           - os: ubuntu-20.04
             CC: gcc-8
             CXX: g++-8
-            ruby: '2.6'
+            ruby: '2.5'
             PackageDeps: g++-8
           - os: ubuntu-20.04
             CC: gcc-9
             CXX: g++-9
-            ruby: '2.7'
+            ruby: '2.6'
             PackageDeps: g++-9
             feature: Codecov
           - os: ubuntu-22.04