diff --git a/src/test/java/pl/damianszczepanik/jenkins/buildhistorymanager/model/actions/DeleteArtifactsMatchingPatternsActionTest.java b/src/test/java/pl/damianszczepanik/jenkins/buildhistorymanager/model/actions/DeleteArtifactsMatchingPatternsActionTest.java
index 2ef5966f..81b5e79d 100644
--- a/src/test/java/pl/damianszczepanik/jenkins/buildhistorymanager/model/actions/DeleteArtifactsMatchingPatternsActionTest.java
+++ b/src/test/java/pl/damianszczepanik/jenkins/buildhistorymanager/model/actions/DeleteArtifactsMatchingPatternsActionTest.java
@@ -343,6 +343,9 @@ public void testDeleteParentDirectories() {
         Assert.assertFalse(parentDir.exists());
         Assert.assertFalse(grandparentDir.exists());
         Assert.assertTrue(archiveRootDir.exists());
+
+       // This is the scenario where directory is null for code coverage
+        deleteInstance.deleteParentDirectories(null);
     }
 
     @Test // testing deleteDirectory method for successful directory deletion for code coverage