diff --git a/src/main/kotlin/git/semver/plugin/changelog/ChangeLogBuilder.kt b/src/main/kotlin/git/semver/plugin/changelog/ChangeLogBuilder.kt
index 86fe605..28f85a2 100644
--- a/src/main/kotlin/git/semver/plugin/changelog/ChangeLogBuilder.kt
+++ b/src/main/kotlin/git/semver/plugin/changelog/ChangeLogBuilder.kt
@@ -3,7 +3,7 @@ package git.semver.plugin.changelog
 import git.semver.plugin.changelog.ChangeLogTexts.Companion.BREAKING_CHANGE
 import java.util.*
 
-open class ChangeLogBuilder(
+class ChangeLogBuilder(
     val groupKey: String? = null,
     private val commitInfos: List<ChangeLogFormatter.CommitInfo>,
     private val context: ChangeLogFormatter.Context,
diff --git a/src/test/kotlin/git/semver/plugin/changelog/ChangeLogFormatTest.kt b/src/test/kotlin/git/semver/plugin/changelog/ChangeLogFormatTest.kt
index 8c9dcef..d120470 100644
--- a/src/test/kotlin/git/semver/plugin/changelog/ChangeLogFormatTest.kt
+++ b/src/test/kotlin/git/semver/plugin/changelog/ChangeLogFormatTest.kt
@@ -135,10 +135,14 @@ class ChangeLogFormatTest {
         val changeLog = listOf(
             Commit("fix: B", "1", emptySequence()),
             Commit("fix: A", "2", emptySequence()),
+            Commit("ignore: B", "5", emptySequence()),
             Commit("fix: B", "3", emptySequence()),
             Commit("fix: A", "4", emptySequence()),
         )
-        val c = ChangeLogTexts(mutableMapOf("fix" to "FIX", "#" to "CHANGELOG"))
+        val c = ChangeLogTexts(mutableMapOf(
+            "fix" to "FIX",
+            "ignore" to "",
+            "#" to "CHANGELOG"))
         c.groupByText  = false
         c.sortByText = false