diff --git a/phosphor-regulators/test/system_tests.cpp b/phosphor-regulators/test/system_tests.cpp
index dfc22a0..b79e1ba 100644
--- a/phosphor-regulators/test/system_tests.cpp
+++ b/phosphor-regulators/test/system_tests.cpp
@@ -18,6 +18,8 @@
 #include "id_map.hpp"
 #include "journal.hpp"
 #include "mock_journal.hpp"
+#include "mocked_i2c_interface.hpp"
+#include "pmbus_read_sensor_action.hpp"
 #include "rail.hpp"
 #include "rule.hpp"
 #include "system.hpp"
@@ -29,11 +31,16 @@
 #include <utility>
 #include <vector>
 
+#include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
 using namespace phosphor::power::regulators;
 using namespace phosphor::power::regulators::test_utils;
 
+using ::testing::A;
+using ::testing::Return;
+using ::testing::TypedEq;
+
 TEST(SystemTests, Constructor)
 {
     // Create Rules
@@ -187,3 +194,62 @@
     EXPECT_EQ(system.getRules()[0]->getID(), "set_voltage_rule");
     EXPECT_EQ(system.getRules()[1]->getID(), "read_sensors_rule");
 }
+
+TEST(SystemTests, MonitorSensors)
+{
+    // Create PMBusReadSensorAction
+    pmbus_utils::SensorValueType type{pmbus_utils::SensorValueType::iout};
+    uint8_t command = 0x8C;
+    pmbus_utils::SensorDataFormat format{
+        pmbus_utils::SensorDataFormat::linear_11};
+    std::optional<int8_t> exponent{};
+    std::unique_ptr<PMBusReadSensorAction> action =
+        std::make_unique<PMBusReadSensorAction>(type, command, format,
+                                                exponent);
+
+    // Create mock I2CInterface.  A two-byte read should occur.
+    std::unique_ptr<i2c::MockedI2CInterface> i2cInterface =
+        std::make_unique<i2c::MockedI2CInterface>();
+    EXPECT_CALL(*i2cInterface, isOpen).Times(1).WillOnce(Return(true));
+    EXPECT_CALL(*i2cInterface, read(TypedEq<uint8_t>(0x8C), A<uint16_t&>()))
+        .Times(1);
+
+    // Create SensorMonitoring
+    std::vector<std::unique_ptr<Action>> actions{};
+    actions.emplace_back(std::move(action));
+    std::unique_ptr<SensorMonitoring> sensorMonitoring =
+        std::make_unique<SensorMonitoring>(std::move(actions));
+
+    // Create Rail
+    std::vector<std::unique_ptr<Rail>> rails{};
+    std::unique_ptr<Configuration> configuration{};
+    std::unique_ptr<Rail> rail = std::make_unique<Rail>(
+        "vdd0", std::move(configuration), std::move(sensorMonitoring));
+    rails.emplace_back(std::move(rail));
+
+    // Create Device
+    std::unique_ptr<PresenceDetection> presenceDetection{};
+    std::unique_ptr<Configuration> deviceConfiguration{};
+    std::unique_ptr<Device> device = std::make_unique<Device>(
+        "reg1", true, "/system/chassis/motherboard/reg1",
+        std::move(i2cInterface), std::move(presenceDetection),
+        std::move(deviceConfiguration), std::move(rails));
+
+    // Create Chassis
+    std::vector<std::unique_ptr<Device>> devices{};
+    devices.emplace_back(std::move(device));
+    std::unique_ptr<Chassis> chassis =
+        std::make_unique<Chassis>(1, std::move(devices));
+
+    // Create System that contains Chassis
+    std::vector<std::unique_ptr<Rule>> rules{};
+    std::vector<std::unique_ptr<Chassis>> chassisVec{};
+    chassisVec.emplace_back(std::move(chassis));
+    System system{std::move(rules), std::move(chassisVec)};
+
+    // Call monitorSensors()
+    journal::clear();
+    system.monitorSensors();
+    EXPECT_EQ(journal::getDebugMessages().size(), 0);
+    EXPECT_EQ(journal::getErrMessages().size(), 0);
+}