diff --git a/src/main/groovy/org/beryx/jlink/data/JlinkPluginExtension.groovy b/src/main/groovy/org/beryx/jlink/data/JlinkPluginExtension.groovy
index c2b597d0..be14e379 100644
--- a/src/main/groovy/org/beryx/jlink/data/JlinkPluginExtension.groovy
+++ b/src/main/groovy/org/beryx/jlink/data/JlinkPluginExtension.groovy
@@ -174,7 +174,7 @@ class JlinkPluginExtension {
         action.execute(launcherData.get())
     }
 
-    void secondaryLauncher(Action<LauncherData> action) {
+    void secondaryLauncher(Action<SecondaryLauncherData> action) {
         def ld = new SecondaryLauncherData(null)
         ld.moduleName = moduleName.get()
         Util.addToListProperty(secondaryLaunchers, ld)
diff --git a/src/test/resources/multi-launch-kotlin-dsl/build.gradle b/src/test/resources/multi-launch-kotlin-dsl/build.gradle
deleted file mode 100644
index bea11a17..00000000
--- a/src/test/resources/multi-launch-kotlin-dsl/build.gradle
+++ /dev/null
@@ -1,29 +0,0 @@
-plugins {
-    id 'org.javamodularity.moduleplugin' version '1.8.12'
-    id 'org.beryx.jlink'
-}
-
-repositories {
-    mavenCentral()
-}
-
-ext.moduleName = 'org.example.multi'
-
-application {
-    mainClass = 'org.example.multi.Hello'
-}
-
-jlink {
-    launcher {
-        name = 'hello'
-    }
-    secondaryLauncher {
-        name = 'helloAgain'
-        mainClass = 'org.example.multi.HelloAgain'
-    }
-    secondaryLauncher {
-        name = 'howdy'
-        moduleName = 'org.example.multi'
-        mainClass = 'org.example.multi.Howdy'
-    }
-}
diff --git a/src/test/resources/multi-launch-kotlin-dsl/build.gradle.kts b/src/test/resources/multi-launch-kotlin-dsl/build.gradle.kts
new file mode 100644
index 00000000..667d2bc6
--- /dev/null
+++ b/src/test/resources/multi-launch-kotlin-dsl/build.gradle.kts
@@ -0,0 +1,35 @@
+plugins {
+    id("org.javamodularity.moduleplugin") version "1.8.12"
+    id("org.beryx.jlink")
+}
+
+repositories {
+    mavenCentral()
+}
+
+extra["moduleName"] = "org.example.multi"
+
+application {
+    mainClass.set("org.example.multi.Hello")
+}
+
+jlink {
+    launcher {
+        name = "hello"
+        noConsole = false
+        jvmArgs = listOf(
+            "-Xms512m",
+            "-Xmx4g",
+            "-XX:+UseShenandoahGC"
+        )
+    }
+    secondaryLauncher {
+        name = "helloAgain"
+        mainClass = "org.example.multi.HelloAgain"
+    }
+    secondaryLauncher {
+        name = "howdy"
+        moduleName= "org.example.multi"
+        mainClass = "org.example.multi.Howdy"
+    }
+}
diff --git a/src/test/resources/multi-launch-kotlin-dsl/settings.gradle b/src/test/resources/multi-launch-kotlin-dsl/settings.gradle
deleted file mode 100644
index a8f91313..00000000
--- a/src/test/resources/multi-launch-kotlin-dsl/settings.gradle
+++ /dev/null
@@ -1 +0,0 @@
-rootProject.name = 'multi-launch-kotlin-dsl'
diff --git a/src/test/resources/multi-launch-kotlin-dsl/settings.gradle.kts b/src/test/resources/multi-launch-kotlin-dsl/settings.gradle.kts
new file mode 100644
index 00000000..739e51d4
--- /dev/null
+++ b/src/test/resources/multi-launch-kotlin-dsl/settings.gradle.kts
@@ -0,0 +1 @@
+rootProject.name = "multi-launch-kotlin-dsl"