diff --git a/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/AppendableMavenFileRepository.groovy b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/AppendableMavenFileRepository.groovy
new file mode 100644
index 000000000..18e4331da
--- /dev/null
+++ b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/AppendableMavenFileRepository.groovy
@@ -0,0 +1,14 @@
+package com.github.jengelman.gradle.plugins.shadow.util
+
+import com.github.jengelman.gradle.plugins.shadow.util.repo.maven.MavenFileRepository
+import groovy.transform.InheritConstructors
+
+@InheritConstructors
+class AppendableMavenFileRepository extends MavenFileRepository {
+
+    @Override
+    AppendableMavenFileModule module(String groupId, String artifactId, String version = '1.0') {
+        def artifactDir = rootDir.resolve("${groupId.replace('.', '/')}/$artifactId/$version")
+        return new AppendableMavenFileModule(artifactDir, groupId, artifactId, version as String)
+    }
+}
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
new file mode 100644
index 000000000..80d482224
--- /dev/null
+++ b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileModule.groovy
@@ -0,0 +1,46 @@
+package com.github.jengelman.gradle.plugins.shadow.util.repo.maven
+
+import org.jetbrains.annotations.NotNull
+
+class MavenFileModule extends AbstractMavenModule {
+    private boolean uniqueSnapshots = true
+
+    MavenFileModule(File moduleDir, String groupId, String artifactId, String version) {
+        super(moduleDir, groupId, artifactId, version)
+    }
+
+    @Override
+    boolean getUniqueSnapshots() {
+        return uniqueSnapshots
+    }
+
+    @Override
+    String getMetaDataFileContent() {
+        """
+            <metadata>
+              <!-- ${getArtifactContent()} -->
+              <groupId>$groupId</groupId>
+              <artifactId>$artifactId</artifactId>
+              <version>$version</version>
+              <versioning>
+                <snapshot>
+                  <timestamp>${timestampFormat.format(publishTimestamp)}</timestamp>
+                  <buildNumber>$publishCount</buildNumber>
+                </snapshot>
+                <lastUpdated>${updateFormat.format(publishTimestamp)}</lastUpdated>
+              </versioning>
+            </metadata>
+        """.stripIndent()
+    }
+
+    @Override
+    protected void onPublish(@NotNull File file) {
+        sha1File(file)
+        md5File(file)
+    }
+
+    @Override
+    protected boolean publishesMetaDataFile() {
+        uniqueSnapshots && version.endsWith("-SNAPSHOT")
+    }
+}
diff --git a/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileRepository.groovy b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileRepository.groovy
new file mode 100644
index 000000000..fdff3a8ed
--- /dev/null
+++ b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileRepository.groovy
@@ -0,0 +1,23 @@
+package com.github.jengelman.gradle.plugins.shadow.util.repo.maven
+
+/**
+ * A fixture for dealing with file Maven repositories.
+ */
+class MavenFileRepository implements MavenRepository {
+    final File rootDir
+
+    MavenFileRepository(File rootDir) {
+        this.rootDir = rootDir
+    }
+
+    @Override
+    URI getUri() {
+        return rootDir.toURI()
+    }
+
+    @Override
+    MavenFileModule module(String groupId, String artifactId, String version = '1.0') {
+        def artifactDir = rootDir.resolve("${groupId.replace('.', '/')}/$artifactId/$version")
+        return new MavenFileModule(artifactDir, groupId, artifactId, version as String)
+    }
+}
diff --git a/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/AppendableMavenFileRepository.kt b/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/AppendableMavenFileRepository.kt
deleted file mode 100644
index b0441362b..000000000
--- a/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/AppendableMavenFileRepository.kt
+++ /dev/null
@@ -1,12 +0,0 @@
-package com.github.jengelman.gradle.plugins.shadow.util
-
-import com.github.jengelman.gradle.plugins.shadow.util.repo.maven.MavenFileRepository
-import java.io.File
-
-class AppendableMavenFileRepository(rootDir: File) : MavenFileRepository(rootDir) {
-
-  override fun module(groupId: String, artifactId: String, version: String): AppendableMavenFileModule {
-    val artifactDir = rootDir.resolve("${groupId.replace('.', '/')}/$artifactId/$version")
-    return AppendableMavenFileModule(artifactDir, groupId, artifactId, version)
-  }
-}
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
deleted file mode 100644
index 81b23ec0e..000000000
--- a/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileModule.kt
+++ /dev/null
@@ -1,43 +0,0 @@
-package com.github.jengelman.gradle.plugins.shadow.util.repo.maven
-
-import java.io.File
-import org.intellij.lang.annotations.Language
-import org.jetbrains.annotations.NotNull
-
-class MavenFileModule(
-  moduleDir: File,
-  groupId: String,
-  artifactId: String,
-  version: String,
-) : AbstractMavenModule(moduleDir, groupId, artifactId, version) {
-
-  override fun getUniqueSnapshots(): Boolean = uniqueSnapshots
-
-  @Language("XML")
-  override fun getMetaDataFileContent(): String {
-    return """
-      <metadata>
-        <!-- $artifactContent -->
-        <groupId>$groupId</groupId>
-        <artifactId>$artifactId</artifactId>
-        <version>$version</version>
-        <versioning>
-          <snapshot>
-            <timestamp>${timestampFormat.format(publishTimestamp)}</timestamp>
-            <buildNumber>$publishCount</buildNumber>
-          </snapshot>
-          <lastUpdated>${updateFormat.format(publishTimestamp)}</lastUpdated>
-        </versioning>
-      </metadata>
-    """.trimIndent()
-  }
-
-  override fun onPublish(@NotNull file: File) {
-    sha1File(file)
-    md5File(file)
-  }
-
-  override fun publishesMetaDataFile(): Boolean {
-    return uniqueSnapshots && version.endsWith("-SNAPSHOT")
-  }
-}
diff --git a/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileRepository.kt b/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileRepository.kt
deleted file mode 100644
index 026ebd8de..000000000
--- a/src/intiTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/repo/maven/MavenFileRepository.kt
+++ /dev/null
@@ -1,21 +0,0 @@
-package com.github.jengelman.gradle.plugins.shadow.util.repo.maven
-
-import java.io.File
-import java.net.URI
-
-/**
- * A fixture for dealing with file Maven repositories.
- */
-abstract class MavenFileRepository(val rootDir: File) : MavenRepository {
-
-  override val uri: URI = rootDir.toURI()
-
-  override fun module(groupId: String, artifactId: String): MavenModule {
-    return module(groupId, artifactId, "1.0")
-  }
-
-  override fun module(groupId: String, artifactId: String, version: String): MavenModule {
-    val artifactDir = rootDir.resolve("${groupId.replace('.', '/')}/$artifactId/$version")
-    return MavenFileModule(artifactDir, groupId, artifactId, version)
-  }
-}