diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 756d6dea41e00830f5a6b8a1e9953fca464e031d..23ec416af70398deceee3738895271001e5ac6c3 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.6', '2.7', '3.0', '3.1']
+        ruby-version: ['2.7', '3.0', '3.1']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5df85ecdc859fd9f7582e07d426e5b00a8542191..faf78ae4025dad1502d83df9165f5ed99f620e1f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,7 @@ cache:
     - vendor/ruby
 
 lint:rubocop:
-  image: "ruby:2.6"
+  image: ruby
   script:
     - gem install rubocop -N
     - rubocop lib
@@ -25,10 +25,6 @@ lint:rubocop:
     reports:
       junit: "reports/TEST-*.xml"
 
-test:ruby2.6:
-  extends: .test
-  image: "ruby:2.6"
-
 test:ruby2.7:
   extends: .test
   image: "ruby:2.7"