diff --git a/plugins/version-control-systems/git/src/main/kotlin/GitRepo.kt b/plugins/version-control-systems/git/src/main/kotlin/GitRepo.kt
index b6d1c9a4bd1e7..efd6da780ce70 100644
--- a/plugins/version-control-systems/git/src/main/kotlin/GitRepo.kt
+++ b/plugins/version-control-systems/git/src/main/kotlin/GitRepo.kt
@@ -71,7 +71,7 @@ private data class Include(
     val name: String
 )
 
-object GitRepoCommand : CommandLineTool {
+internal object GitRepoCommand : CommandLineTool {
     override fun command(workingDir: File?) = "repo"
 
     override fun transformVersion(output: String): String {
diff --git a/plugins/version-control-systems/mercurial/src/main/kotlin/Mercurial.kt b/plugins/version-control-systems/mercurial/src/main/kotlin/Mercurial.kt
index 602996cc5b379..cab1961d4b09f 100644
--- a/plugins/version-control-systems/mercurial/src/main/kotlin/Mercurial.kt
+++ b/plugins/version-control-systems/mercurial/src/main/kotlin/Mercurial.kt
@@ -33,7 +33,7 @@ import org.ossreviewtoolkit.utils.common.ProcessCapture
 const val MERCURIAL_LARGE_FILES_EXTENSION = "largefiles = "
 const val MERCURIAL_SPARSE_EXTENSION = "sparse = "
 
-object MercurialCommand : CommandLineTool {
+internal object MercurialCommand : CommandLineTool {
     private val versionRegex = Regex("Mercurial .*\\([Vv]ersion (?<version>[\\d.]+)\\)")
 
     override fun command(workingDir: File?) = "hg"