diff --git a/tests/test_port.cpp b/tests/test_port.cpp
new file mode 100644
index 0000000..32b9b49
--- /dev/null
+++ b/tests/test_port.cpp
@@ -0,0 +1,165 @@
+#include "modbus_server_tester.hpp"
+#include "port/base_port.hpp"
+
+#include <fcntl.h>
+
+#include <gtest/gtest.h>
+
+using namespace std::literals;
+
+namespace TestIntf = phosphor::modbus::test;
+namespace PortIntf = phosphor::modbus::rtu::port;
+namespace PortConfigIntf = PortIntf::config;
+namespace RTUIntf = phosphor::modbus::rtu;
+
+struct properties_t
+{
+    std::string name = {};
+    std::string mode = {};
+    uint64_t baud_rate = {};
+    uint64_t rts_delay = {};
+};
+
+class MockPort : public PortIntf::BasePort
+{
+  public:
+    MockPort(sdbusplus::async::context& ctx,
+             const PortConfigIntf::Config& config,
+             const std::string& devicePath) : BasePort(ctx, config, devicePath)
+    {}
+};
+
+class PortTest : public ::testing::Test
+{
+  public:
+    static constexpr properties_t properties = {"TestPort", "RS485", 115200, 1};
+    static constexpr const char* clientDevicePath = "/tmp/ttyPortV0";
+    static constexpr const char* serverDevicePath = "/tmp/ttyPortV1";
+    static constexpr const auto defaultBaudeRate = "b115200";
+    int socat_pid = -1;
+    sdbusplus::async::context ctx;
+    int fdClient = -1;
+    std::unique_ptr<TestIntf::ServerTester> serverTester;
+    int fdServer = -1;
+
+    PortTest()
+    {
+        std::string socatCmd = std::format(
+            "socat -x -v -d -d pty,link={},rawer,echo=0,parenb,{} pty,link={},rawer,echo=0,parenb,{} & echo $!",
+            serverDevicePath, defaultBaudeRate, clientDevicePath,
+            defaultBaudeRate);
+
+        // Start socat in the background and capture its PID
+        FILE* fp = popen(socatCmd.c_str(), "r");
+        EXPECT_NE(fp, nullptr) << "Failed to start socat: " << strerror(errno);
+        EXPECT_GT(fscanf(fp, "%d", &socat_pid), 0);
+        pclose(fp);
+
+        // Wait for socat to start up
+        sleep(1);
+
+        fdClient = open(clientDevicePath, O_RDWR | O_NOCTTY | O_NONBLOCK);
+        EXPECT_NE(fdClient, -1)
+            << "Failed to open serial port " << clientDevicePath
+            << " with error: " << strerror(errno);
+
+        fdServer = open(serverDevicePath, O_RDWR | O_NOCTTY | O_NONBLOCK);
+        EXPECT_NE(fdServer, -1)
+            << "Failed to open serial port " << serverDevicePath
+            << " with error: " << strerror(errno);
+
+        serverTester = std::make_unique<TestIntf::ServerTester>(ctx, fdServer);
+    }
+
+    ~PortTest() noexcept override
+    {
+        if (fdClient != -1)
+        {
+            close(fdClient);
+            fdClient = -1;
+        }
+        if (fdServer != -1)
+        {
+            close(fdServer);
+            fdServer = -1;
+        }
+        kill(socat_pid, SIGTERM);
+    }
+
+    auto TestHoldingRegisters(PortConfigIntf::Config& config, MockPort& port,
+                              uint16_t registerOffset, bool res)
+        -> sdbusplus::async::task<void>
+    {
+        std::vector<uint16_t> registers(
+            TestIntf::testSuccessReadHoldingRegisterCount);
+
+        auto ret = co_await port.readHoldingRegisters(
+            TestIntf::testDeviceAddress, registerOffset, config.baudRate,
+            RTUIntf::Parity::none, registers);
+
+        EXPECT_EQ(ret, res) << "Failed to read holding registers";
+
+        if (!res)
+        {
+            co_return;
+        }
+
+        for (auto i = 0; i < TestIntf::testSuccessReadHoldingRegisterCount; i++)
+        {
+            EXPECT_EQ(registers[i],
+                      TestIntf::testSuccessReadHoldingRegisterResponse[i]);
+        }
+
+        co_return;
+    }
+};
+
+TEST_F(PortTest, TestUpdateConfig)
+{
+    PortConfigIntf::Config config = {};
+    auto res = PortConfigIntf::updateBaseConfig(config, properties);
+    EXPECT_TRUE(res) << "Failed to update config";
+
+    EXPECT_EQ(config.name, properties.name);
+    EXPECT_EQ(config.portMode, PortConfigIntf::PortMode::rs485);
+    EXPECT_EQ(config.baudRate, properties.baud_rate);
+    EXPECT_EQ(config.rtsDelay, properties.rts_delay);
+}
+
+TEST_F(PortTest, TestReadHoldingRegisterSuccess)
+{
+    PortConfigIntf::Config config = {};
+    auto res = PortConfigIntf::updateBaseConfig(config, properties);
+    EXPECT_TRUE(res) << "Failed to update config";
+
+    MockPort port(ctx, config, clientDevicePath);
+
+    ctx.spawn(serverTester->processRequests());
+
+    ctx.spawn(TestHoldingRegisters(
+        config, port, TestIntf::testSuccessReadHoldingRegisterOffset, true));
+
+    ctx.spawn(sdbusplus::async::sleep_for(ctx, 1s) |
+              sdbusplus::async::execution::then([&]() { ctx.request_stop(); }));
+
+    ctx.run();
+}
+
+TEST_F(PortTest, TestReadHoldingRegisterFailure)
+{
+    PortConfigIntf::Config config = {};
+    auto res = PortConfigIntf::updateBaseConfig(config, properties);
+    EXPECT_TRUE(res) << "Failed to update config";
+
+    MockPort port(ctx, config, clientDevicePath);
+
+    ctx.spawn(serverTester->processRequests());
+
+    ctx.spawn(TestHoldingRegisters(
+        config, port, TestIntf::testFailureReadHoldingRegister, false));
+
+    ctx.spawn(sdbusplus::async::sleep_for(ctx, 1s) |
+              sdbusplus::async::execution::then([&]() { ctx.request_stop(); }));
+
+    ctx.run();
+}