diff --git a/src/test/groovy/nebula/plugin/publishing/ivy/IvyNebulaShadowJarPublishPluginIntegrationSpec.groovy b/src/test/groovy/nebula/plugin/publishing/ivy/IvyNebulaShadowJarPublishPluginIntegrationSpec.groovy
index ca02a67e..d33478c6 100644
--- a/src/test/groovy/nebula/plugin/publishing/ivy/IvyNebulaShadowJarPublishPluginIntegrationSpec.groovy
+++ b/src/test/groovy/nebula/plugin/publishing/ivy/IvyNebulaShadowJarPublishPluginIntegrationSpec.groovy
@@ -71,7 +71,7 @@ class IvyNebulaShadowJarPublishPluginIntegrationSpec extends IntegrationTestKitS
             }
             
             shadowJar {
-                classifier null // this configuration is used to produce only the shadowed jar
+               archiveClassifier.set(null) // this configuration is used to produce only the shadowed jar
                relocate 'com.google', 'com.netflix.shading.google'
             }
 """