diff --git a/libwvdrmengine/cdm/core/test/duration_use_case_test.cpp b/libwvdrmengine/cdm/core/test/duration_use_case_test.cpp
index 0fd4f519..fe7e71b6 100644
--- a/libwvdrmengine/cdm/core/test/duration_use_case_test.cpp
+++ b/libwvdrmengine/cdm/core/test/duration_use_case_test.cpp
@@ -28,6 +28,7 @@
 #include "test_printers.h"
 #include "test_sleep.h"
 #include "url_request.h"
+#include "wv_attributes.h"
 #include "wv_cdm_constants.h"
 #include "wv_cdm_event_listener.h"
 #include "wv_cdm_types.h"
@@ -95,7 +96,8 @@ class SimpleEventListener : public wvcdm::WvCdmEventListener {
   }
   void OnSessionKeysChange(const CdmSessionId&, const CdmKeyStatusMap&,
                            bool) override {}
-  void OnExpirationUpdate(const CdmSessionId&, int64_t expiry_time) override {}
+  void OnExpirationUpdate(const CdmSessionId&,
+                          int64_t expiry_time UNUSED) override {}
   bool renewal_needed() { return renewal_needed_; }
   void set_renewal_needed(bool renewal_needed) {
     renewal_needed_ = renewal_needed;
diff --git a/libwvdrmengine/cdm/test/request_license_test.cpp b/libwvdrmengine/cdm/test/request_license_test.cpp
index d539bad7..e0598ea9 100644
--- a/libwvdrmengine/cdm/test/request_license_test.cpp
+++ b/libwvdrmengine/cdm/test/request_license_test.cpp
@@ -53,13 +53,13 @@ namespace {
 const int kHttpOk = 200;
 
 const wvcdm::CdmIdentifier kExampleIdentifier = {
-    wvcdm::EMPTY_SPOID, "com.example", "com.example", 7};
+    wvcdm::EMPTY_SPOID, "com.example", "com.example", 7, 9};
 
 const wvcdm::CdmIdentifier kAlternateCdmIdentifier1 = {
-    "alternate_spoid_1", "alternate_origin_1", "com.alternate1.url", 8};
+    "alternate_spoid_1", "alternate_origin_1", "com.alternate1.url", 8, 10};
 
 const wvcdm::CdmIdentifier kAlternateCdmIdentifier2 = {
-    "alternate_spoid_2", "" /* empty origin */, "com.alternate2.url", 8};
+    "alternate_spoid_2", "" /* empty origin */, "com.alternate2.url", 9, 11};
 
 const std::string kEmptyServiceCertificate;
 const std::string kComma = ",";
diff --git a/libwvdrmengine/cdm/test/wv_cdm_metrics_test.cpp b/libwvdrmengine/cdm/test/wv_cdm_metrics_test.cpp
index 3241ea6f..f4db8233 100644
--- a/libwvdrmengine/cdm/test/wv_cdm_metrics_test.cpp
+++ b/libwvdrmengine/cdm/test/wv_cdm_metrics_test.cpp
@@ -145,10 +145,10 @@ TEST_F(WvContentDecryptionModuleMetricsTest,
   CdmSessionId session_id;
   wvcdm::CdmKeySystem key_system("com.widevine");
   CdmIdentifier identifiers[] = {kDefaultCdmIdentifier,
-                                 {"foo", "bar", "baz", 7},
+                                 {"foo", "bar", "baz", 7, 10},
                                  // Note that this has all the same parameters
                                  // as the one above except for the unique_id.
-                                 {"foo", "bar", "baz", 8}};
+                                 {"foo", "bar", "baz", 8, 11}};
   const int cdm_engine_count = 3;
 
   // Force Unprovision.
diff --git a/libwvdrmengine/cdm/util/include/wv_attributes.h b/libwvdrmengine/cdm/util/include/wv_attributes.h
new file mode 100644
index 00000000..c817f1c0
--- /dev/null
+++ b/libwvdrmengine/cdm/util/include/wv_attributes.h
@@ -0,0 +1,16 @@
+// Copyright 2021 Google LLC. All rights reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine
+// License Agreement.
+
+#ifndef WVCDM_UTIL_WV_ATTRIBUTES_H_
+#define WVCDM_UTIL_WV_ATTRIBUTES_H_
+
+#ifndef UNUSED
+#  if defined(__GNUC__) || defined(__clang__)
+#    define UNUSED __attribute__((__unused__))
+#  else
+#    define UNUSED
+#  endif
+#endif
+
+#endif  // WVCDM_UTIL_WV_ATTRIBUTES_H_
diff --git a/libwvdrmengine/mediadrm/test/WVDrmPlugin_test.cpp b/libwvdrmengine/mediadrm/test/WVDrmPlugin_test.cpp
index 11f96b76..a4be0776 100644
--- a/libwvdrmengine/mediadrm/test/WVDrmPlugin_test.cpp
+++ b/libwvdrmengine/mediadrm/test/WVDrmPlugin_test.cpp
@@ -913,6 +913,7 @@ TEST_F(WVDrmPluginTest, RejectsAtscProvisioningRequests) {
 
   Status status = plugin.setPropertyString(hidl_string("atscMode"),
                                            hidl_string("enable"));
+  ASSERT_EQ(Status::OK, status);
 
   plugin.getProvisionRequest(
       hidl_string(""), hidl_string(""),