diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cae6f00f1357f68b5ba1126e50eaf037dd06ce22..a53e3fb140ac8d54a11adaeb4f84af99c8075044 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,8 +6,6 @@ stages:
 ruby_2.1:
   image: ruby:2.1
   stage: syntax
-  tags:
-    - ruby
   script:
     - ruby -v
     - ruby scheck.rb
@@ -15,8 +13,6 @@ ruby_2.1:
 ruby_2.2:
   image: ruby:2.2
   stage: syntax
-  tags:
-    - ruby
   only:
     - master
   script:
@@ -26,8 +22,6 @@ ruby_2.2:
 ruby_2.3:
   image: ruby:2.3
   stage: syntax
-  tags:
-    - ruby
   only:
     - master
   script:
@@ -37,8 +31,24 @@ ruby_2.3:
 ruby_2.4:
   image: ruby:2.4
   stage: syntax
-  tags:
-    - ruby
+  only:
+    - master
+  script:
+    - ruby -v
+    - ruby scheck.rb
+
+ruby_2.5:
+  image: ruby:2.5
+  stage: syntax
+  only:
+    - master
+  script:
+    - ruby -v
+    - ruby scheck.rb
+
+ruby_2.6:
+  image: ruby:2.6
+  stage: syntax
   only:
     - master
   script:
@@ -48,8 +58,6 @@ ruby_2.4:
 jruby_1.7:
   image: jruby:1.7
   stage: syntax
-  tags:
-    - ruby
   only:
     - master
   script:
@@ -59,8 +67,6 @@ jruby_1.7:
 jruby_9.1:
   image: jruby:9.1
   stage: syntax
-  tags:
-    - ruby
   only:
     - master
   script:
@@ -69,8 +75,6 @@ jruby_9.1:
 
 rubocop:
   stage: linting
-  tags:
-    - ruby
   script:
     - gem install rubocop --no-document
     - rubocop -l -f simple --except RescueException,Eval,AssignmentInCondition,ScriptPermission