diff --git a/Jenkinsfile.declarative b/Jenkinsfile.declarative
index 2f7ada4..3906cec 100644
--- a/Jenkinsfile.declarative
+++ b/Jenkinsfile.declarative
@@ -18,7 +18,7 @@ pipeline {
     stage('Test image') {
       steps {
         script {
-          dockerImage.inside() {
+          dockerImage.inside { c ->
             sh '/usr/bin/env'
           }
         }