diff --git a/services/tunnelbroker/test/DatabaseManagerTest.cpp b/services/tunnelbroker/test/DatabaseManagerTest.cpp
--- a/services/tunnelbroker/test/DatabaseManagerTest.cpp
+++ b/services/tunnelbroker/test/DatabaseManagerTest.cpp
@@ -22,3 +22,43 @@
     Aws::ShutdownAPI({});
   }
 };
+
+TEST_F(DatabaseManagerTest, TestOperationsOnSessionSignItem) {
+  const database::SessionSignItem item(
+      "bB3OSLdKlY60KPBpw6VoGKX7Lmw3SA07FmNhnqnclvVeaxXueAQ0dpQSpiQTtlGn",
+      "mobile:EMQNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdoYAQRt0S6TLzZWNM6XSvdWqxm";
+  EXPECT_EQ(
+      database::DatabaseManager::getInstance().isTableAvailable(
+          item.getTableName()),
+      true);
+  database::DatabaseManager::getInstance().putSessionSignItem(item);
+  std::shared_ptr<database::SessionSignItem> foundItem =
+      database::DatabaseManager::getInstance().findSessionSignItem(
+          item.getDeviceID());
+  EXPECT_NE(foundItem, nullptr);
+  EXPECT_EQ(item.getSign(), foundItem->getSign());
+  database::DatabaseManager::getInstance().removeSessionSignItem(
+      item.getDeviceID());
+}
+
+TEST_F(DatabaseManagerTest, TestOperationsOnSessionSignItemGenerated) {
+  const database::SessionSignItem item(
+      tools::generateRandomString(SIGNATURE_REQUEST_LENGTH),
+      "mobile:" + tools::generateRandomString(DEVICEID_CHAR_LENGTH));
+  EXPECT_EQ(
+      database::DatabaseManager::getInstance().isTableAvailable(
+          item.getTableName()),
+      true);
+  database::DatabaseManager::getInstance().putSessionSignItem(item);
+  std::shared_ptr<database::SessionSignItem> foundItem =
+      database::DatabaseManager::getInstance().findSessionSignItem(
+          item.getDeviceID());
+  EXPECT_NE(foundItem, nullptr) << "Item with the key of deviceID \""
+                                << item.getDeviceID() << "\" is not found";
+  EXPECT_EQ(item.getSign(), foundItem->getSign())
+      << "Generated signature value \"" << item.getSign()
+      << "\" is not equal of \"" + foundItem->getSign() +
+          "\" from the database value";
+  database::DatabaseManager::getInstance().removeSessionSignItem(
+      item.getDeviceID());
+}