diff --git a/test/psu_unittest.cpp b/test/psu_unittest.cpp
new file mode 100644
index 0000000..d2c84b1
--- /dev/null
+++ b/test/psu_unittest.cpp
@@ -0,0 +1,50 @@
+#include "handler_mock.hpp"
+#include "main.hpp"
+#include "psu.hpp"
+
+#include <cstdint>
+#include <cstring>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+#define MAX_IPMI_BUFFER 64
+
+using ::testing::Return;
+
+namespace google
+{
+namespace ipmi
+{
+
+TEST(PsuCommandTest, InvalidRequestLength)
+{
+    std::vector<std::uint8_t> request = {SysOEMCommands::SysPsuHardReset};
+    size_t dataLen = request.size();
+    std::uint8_t reply[MAX_IPMI_BUFFER];
+
+    HandlerMock hMock;
+    EXPECT_EQ(IPMI_CC_REQ_DATA_LEN_INVALID,
+              PsuHardReset(request.data(), reply, &dataLen, &hMock));
+}
+
+TEST(PsuCommandTest, ValidRequest)
+{
+    std::uint32_t delayValue = 0x45;
+    struct PsuResetRequest requestContents;
+    requestContents.subcommand = SysOEMCommands::SysPsuHardReset;
+    requestContents.delay = delayValue;
+
+    std::vector<std::uint8_t> request(sizeof(requestContents));
+    std::memcpy(request.data(), &requestContents, sizeof(requestContents));
+    size_t dataLen = request.size();
+    std::uint8_t reply[MAX_IPMI_BUFFER];
+
+    HandlerMock hMock;
+    EXPECT_CALL(hMock, psuResetDelay(delayValue));
+    EXPECT_EQ(IPMI_CC_OK,
+              PsuHardReset(request.data(), reply, &dataLen, &hMock));
+}
+
+} // namespace ipmi
+} // namespace google