diff --git a/test/eth_unittest.cpp b/test/eth_unittest.cpp
index f0e4d23..dd3c73f 100644
--- a/test/eth_unittest.cpp
+++ b/test/eth_unittest.cpp
@@ -1,14 +1,19 @@
 #include "eth.hpp"
+#include "handler_mock.hpp"
 #include "main.hpp"
 
 #include <cstdint>
 #include <cstring>
+#include <string>
+#include <tuple>
 #include <vector>
 
 #include <gtest/gtest.h>
 
 #define MAX_IPMI_BUFFER 64
 
+using ::testing::Return;
+
 namespace google
 {
 namespace ipmi
@@ -22,12 +27,21 @@
     size_t dataLen = request.size();
     std::uint8_t reply[MAX_IPMI_BUFFER];
     const std::uint8_t expectedAnswer[4] = {'e', 't', 'h', '0'};
+    const std::uint8_t expectedChannel = 1;
 
-    EXPECT_EQ(IPMI_CC_OK, GetEthDevice(request.data(), &reply[0], &dataLen));
+    HandlerMock hMock;
+    EXPECT_CALL(hMock, getEthDetails())
+        .WillOnce(Return(std::make_tuple(
+            expectedChannel,
+            std::string(expectedAnswer,
+                        expectedAnswer + sizeof(expectedAnswer)))));
+
+    EXPECT_EQ(IPMI_CC_OK,
+              GetEthDevice(request.data(), &reply[0], &dataLen, &hMock));
     struct EthDeviceReply check;
     std::memcpy(&check, &reply[0], sizeof(check));
     EXPECT_EQ(check.subcommand, SysOEMCommands::SysGetEthDevice);
-    EXPECT_EQ(check.channel, 1);
+    EXPECT_EQ(check.channel, expectedChannel);
     EXPECT_EQ(check.if_name_len, sizeof(expectedAnswer));
     EXPECT_EQ(0, std::memcmp(expectedAnswer, &reply[sizeof(check)],
                              sizeof(expectedAnswer)));