diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a21d8a730d2cfa4f5fd3497c0ec50e678ada921f..82ebcb85454d6934e52b3c6f890974b5d0ff7405 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -54,7 +54,7 @@ jruby_1.7:
     - master
   script:
     - ruby -v
-    - ruby --dev -J-Djruby.launch.inproc=true scheck.rb
+    - ruby -J-Djruby.launch.inproc=true scheck.rb
 
 jruby_9.1:
   image: jruby:9.1
@@ -65,7 +65,7 @@ jruby_9.1:
     - master
   script:
     - ruby -v
-    - ruby --dev -J-Djruby.launch.inproc=true scheck.rb
+    - ruby -J-Djruby.launch.inproc=true scheck.rb
 
 rubocop:
   stage: linting