diff --git a/libwvdrmengine/cdm/test/request_license_test.cpp b/libwvdrmengine/cdm/test/request_license_test.cpp
index e7b03eb3..98089883 100644
--- a/libwvdrmengine/cdm/test/request_license_test.cpp
+++ b/libwvdrmengine/cdm/test/request_license_test.cpp
@@ -2672,6 +2672,30 @@ TEST_F(WvCdmRequestLicenseTest, RestoreOfflineKeyTest) {
   decryptor_->CloseSession(session_id_);
 }
 
+TEST_F(WvCdmRequestLicenseTest, DisallowMultipleRestoreOfflineKeyTest) {
+  Unprovision();
+  Provision();
+
+  std::string key_id;
+  std::string client_auth;
+  GetOfflineConfiguration(&key_id, &client_auth);
+
+  decryptor_->OpenSession(config_.key_system(), nullptr, kDefaultCdmIdentifier,
+                          nullptr, &session_id_);
+  GenerateKeyRequest(key_id, kLicenseTypeOffline);
+  VerifyKeyRequestResponse(config_.license_server(), client_auth);
+
+  CdmKeySetId key_set_id = key_set_id_;
+  decryptor_->CloseSession(session_id_);
+
+  decryptor_->OpenSession(config_.key_system(), nullptr, kDefaultCdmIdentifier,
+                          nullptr, &session_id_);
+  EXPECT_EQ(wvcdm::KEY_ADDED, decryptor_->RestoreKey(session_id_, key_set_id));
+  // Restoring a key twice should result in a failure.
+  EXPECT_NE(wvcdm::KEY_ADDED, decryptor_->RestoreKey(session_id_, key_set_id));
+  decryptor_->CloseSession(session_id_);
+}
+
 TEST_F(WvCdmRequestLicenseTest, ReleaseOfflineKeyTest) {
   Unprovision();
   Provision();