diff --git a/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileModule.groovy b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileModule.groovy
deleted file mode 100644
index b934ade49..000000000
--- a/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileModule.groovy
+++ /dev/null
@@ -1,46 +0,0 @@
-package com.github.jengelman.gradle.plugins.shadow.util.repo.maven
-
-import org.apache.maven.artifact.repository.metadata.Metadata
-import org.apache.maven.artifact.repository.metadata.Snapshot
-import org.apache.maven.artifact.repository.metadata.Versioning
-import org.jetbrains.annotations.NotNull
-
-class MavenFileModule extends AbstractMavenModule {
-    MavenFileModule(File moduleDir, String groupId, String artifactId, String version) {
-        super(moduleDir, groupId, artifactId, version)
-    }
-
-    @Override
-    boolean isUniqueSnapshots() {
-        return true
-    }
-
-    @Override
-    Metadata getMetaData(List<String> versions) {
-        Metadata metadata = new Metadata()
-        metadata.groupId = groupId
-        metadata.artifactId = artifactId
-        metadata.version = version
-
-        Versioning versioning = new Versioning()
-        versioning.versions = versions
-        versioning.snapshot = new Snapshot()
-        versioning.snapshot.timestamp = timestampFormat.format(publishTimestamp)
-        versioning.snapshot.buildNumber = publishCount
-        versioning.lastUpdated = updateFormat.format(publishTimestamp)
-        metadata.versioning = versioning
-
-        return metadata
-    }
-
-    @Override
-    protected void onPublish(@NotNull File file) {
-        sha1File(file)
-        md5File(file)
-    }
-
-    @Override
-    protected boolean isPublishesMetaDataFile() {
-        uniqueSnapshots && version.endsWith("-SNAPSHOT")
-    }
-}
diff --git a/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileModule.kt b/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileModule.kt
new file mode 100644
index 000000000..172e7c137
--- /dev/null
+++ b/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileModule.kt
@@ -0,0 +1,40 @@
+package com.github.jengelman.gradle.plugins.shadow.util.repo.maven
+
+import java.io.File
+import org.apache.maven.artifact.repository.metadata.Metadata
+import org.apache.maven.artifact.repository.metadata.Snapshot
+import org.apache.maven.artifact.repository.metadata.Versioning
+
+open class MavenFileModule(
+  moduleDir: File,
+  groupId: String,
+  artifactId: String,
+  version: String,
+) : AbstractMavenModule(moduleDir, groupId, artifactId, version) {
+
+  override val isUniqueSnapshots: Boolean = true
+
+  override fun getMetaData(versions: List<String>): Metadata {
+    return Metadata().also {
+      it.groupId = groupId
+      it.artifactId = artifactId
+      it.version = version
+      it.versioning = Versioning().also { versioning ->
+        versioning.versions = versions
+        versioning.snapshot = Snapshot().apply {
+          timestamp = timestampFormat.format(publishTimestamp)
+          buildNumber = publishCount
+        }
+        versioning.lastUpdated = updateFormat.format(publishTimestamp)
+      }
+    }
+  }
+
+  override fun onPublish(file: File) {
+    sha1File(file)
+    md5File(file)
+  }
+
+  override val isPublishesMetaDataFile: Boolean
+    get() = isUniqueSnapshots && version.endsWith("-SNAPSHOT")
+}