diff --git a/drm/1.0/vts/functional/drm_hal_clearkey_test.cpp b/drm/1.0/vts/functional/drm_hal_clearkey_test.cpp
index 71b893a813..04f265866c 100644
--- a/drm/1.0/vts/functional/drm_hal_clearkey_test.cpp
+++ b/drm/1.0/vts/functional/drm_hal_clearkey_test.cpp
@@ -129,6 +129,7 @@ TEST_F(DrmHalClearkeyFactoryTest, InvalidPluginNotSupported) {
  */
 TEST_F(DrmHalClearkeyFactoryTest, EmptyPluginUUIDNotSupported) {
     hidl_array<uint8_t, 16> emptyUUID;
+    memset(emptyUUID.data(), 0, 16);
     EXPECT_FALSE(drmFactory->isCryptoSchemeSupported(emptyUUID));
     EXPECT_FALSE(cryptoFactory->isCryptoSchemeSupported(emptyUUID));
 }
diff --git a/drm/1.0/vts/functional/drm_hal_vendor_test.cpp b/drm/1.0/vts/functional/drm_hal_vendor_test.cpp
index ec73a7d022..33fb6fbac3 100644
--- a/drm/1.0/vts/functional/drm_hal_vendor_test.cpp
+++ b/drm/1.0/vts/functional/drm_hal_vendor_test.cpp
@@ -190,6 +190,7 @@ TEST_P(DrmHalVendorFactoryTest, InvalidPluginNotSupported) {
  */
 TEST_P(DrmHalVendorFactoryTest, EmptyPluginUUIDNotSupported) {
     hidl_array<uint8_t, 16> emptyUUID;
+    memset(emptyUUID.data(), 0, 16);
     EXPECT_FALSE(drmFactory->isCryptoSchemeSupported(emptyUUID));
     EXPECT_FALSE(cryptoFactory->isCryptoSchemeSupported(emptyUUID));
 }