diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 82ebcb85454d6934e52b3c6f890974b5d0ff7405..6758248731719d1a35c8ce2002230fe3115dc0df 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -54,7 +54,7 @@ jruby_1.7:
     - master
   script:
     - ruby -v
-    - ruby -J-Djruby.launch.inproc=true scheck.rb
+    - JRUBY_OPTS="-J-Djruby.launch.inproc=true" ruby scheck.rb
 
 jruby_9.1:
   image: jruby:9.1
@@ -65,7 +65,7 @@ jruby_9.1:
     - master
   script:
     - ruby -v
-    - ruby -J-Djruby.launch.inproc=true scheck.rb
+    - JRUBY_OPTS="-J-Djruby.launch.inproc=true" ruby scheck.rb
 
 rubocop:
   stage: linting