diff --git a/artifact/image/layerscanning/testing/fakechainlayer/fake_chain_layer.go b/artifact/image/layerscanning/testing/fakechainlayer/fake_chain_layer.go
index f6844639..08829c44 100644
--- a/artifact/image/layerscanning/testing/fakechainlayer/fake_chain_layer.go
+++ b/artifact/image/layerscanning/testing/fakechainlayer/fake_chain_layer.go
@@ -40,15 +40,18 @@ type FakeChainLayer struct {
 }
 
 // New creates a new FakeChainLayer.
-func New(testDir string, index int, diffID digest.Digest, command string, layer image.Layer, files map[string]string) (*FakeChainLayer, error) {
-	for name, contents := range files {
-		filename := filepath.Join(testDir, name)
-		file, err := os.Create(filename)
-		if err != nil {
-			return nil, err
+func New(testDir string, index int, diffID digest.Digest, command string, layer image.Layer, files map[string]string, filesAlreadyExist bool) (*FakeChainLayer, error) {
+	if !filesAlreadyExist {
+		for name, contents := range files {
+			filename := filepath.Join(testDir, name)
+			if err := os.MkdirAll(filepath.Dir(filename), 0700); err != nil {
+				return nil, err
+			}
+
+			if err := os.WriteFile(filename, []byte(contents), 0600); err != nil {
+				return nil, err
+			}
 		}
-		file.WriteString(contents)
-		file.Close()
 	}
 	return &FakeChainLayer{
 		index:   index,
diff --git a/artifact/image/layerscanning/trace/trace_test.go b/artifact/image/layerscanning/trace/trace_test.go
index 10b105b1..1a31d429 100644
--- a/artifact/image/layerscanning/trace/trace_test.go
+++ b/artifact/image/layerscanning/trace/trace_test.go
@@ -34,7 +34,7 @@ func setupFakeChainLayer(t *testing.T, testDir string, index int, diffID digest.
 	t.Helper()
 
 	layer := fakelayer.New(diffID, command)
-	chainLayer, err := fakechainlayer.New(testDir, index, diffID, command, layer, fileContents)
+	chainLayer, err := fakechainlayer.New(testDir, index, diffID, command, layer, fileContents, false)
 	if err != nil {
 		t.Fatalf("fakechainlayer.New(%d, %q, %q, %v, %v) failed: %v", index, diffID, command, layer, fileContents, err)
 	}