diff --git a/graphics/composer/2.1/utils/vts/ComposerVts.cpp b/graphics/composer/2.1/utils/vts/ComposerVts.cpp
index 2f531b4..6e668af 100644
--- a/graphics/composer/2.1/utils/vts/ComposerVts.cpp
+++ b/graphics/composer/2.1/utils/vts/ComposerVts.cpp
@@ -78,9 +78,9 @@
 ComposerClient::ComposerClient(const sp<IComposerClient>& client) : mClient(client) {}
 
 ComposerClient::~ComposerClient() {
-    for (auto it : mDisplayResources) {
+    for (const auto& it : mDisplayResources) {
         Display display = it.first;
-        DisplayResource& resource = it.second;
+        const DisplayResource& resource = it.second;
 
         for (auto layer : resource.layers) {
             EXPECT_EQ(Error::NONE, mClient->destroyLayer(display, layer))