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 2947d2efbe..26641e8953 100644
--- a/drm/1.0/vts/functional/drm_hal_clearkey_test.cpp
+++ b/drm/1.0/vts/functional/drm_hal_clearkey_test.cpp
@@ -128,6 +128,7 @@ 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 2290df128a..e2c9cca572 100644
--- a/drm/1.0/vts/functional/drm_hal_vendor_test.cpp
+++ b/drm/1.0/vts/functional/drm_hal_vendor_test.cpp
@@ -189,6 +189,7 @@ 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));
 }