diff --git a/clkmgr/Makefile b/clkmgr/Makefile
index 2b991898..6d69e6f0 100644
--- a/clkmgr/Makefile
+++ b/clkmgr/Makefile
@@ -67,7 +67,7 @@ ALL+=$(CLKMGR_LIB_LA) $(CLKMGR_PROXY)
 ifdef GTEST_LIB_FLAGS
 
 CLKMGR_CLIENT_UTEST:=$(CLKMGR_UTEST_DIR)/utest_client
-CLKMGR_CLIENT_SRC:=subscription
+CLKMGR_CLIENT_SRC:=subscription client_state
 CLKMGR_CLIENT_OBJS:=$(foreach n,$(CLKMGR_CLIENT_SRC),$(CLKMGR_UTEST_DIR)/$n.o)
 
 $(CLKMGR_UTEST_DIR)/%.o: $(CLKMGR_UTEST_DIR)/%.cpp | $(COMP_DEPS)
diff --git a/clkmgr/utest/client_state.cpp b/clkmgr/utest/client_state.cpp
new file mode 100644
index 00000000..53a3aa8f
--- /dev/null
+++ b/clkmgr/utest/client_state.cpp
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+   SPDX-FileCopyrightText: Copyright © 2024 Intel Corporation. */
+
+/** @file
+ * @brief ClientState class unit tests
+ *
+ * @author Noor Azura Ahmad Tarmizi <noor.azura.ahmad.tarmizi@intel.com>
+ * @copyright © 2024 Intel Corporation.
+ *
+ */
+
+#define NSEC_PER_SEC    (1000000000)
+
+#include "clockmanager.h"
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+using namespace clkmgr;
+
+TEST(ClientStateTest, ApiTest)
+{
+    ClientState cstate = {};
+    struct timespec current_time = {};
+    TransportClientId refClientID = { 0x41, 0x42, 0x43 };
+    clkmgr_event_state eState = {};
+    clkmgr_event_count eCount = {};
+    cstate.set_connected(true);
+    EXPECT_EQ(cstate.get_connected(), true);
+    cstate.set_subscribed(true);
+    EXPECT_EQ(cstate.get_subscribed(), true);
+    cstate.set_sessionId(0x3f);
+    EXPECT_EQ(cstate.get_sessionId(), 0x3f);
+    cstate.set_ptp4l_id(0x55);
+    EXPECT_EQ(cstate.get_ptp4l_id(), 0x55);
+    cstate.set_clientID(refClientID);
+    if(clock_gettime(CLOCK_REALTIME, &current_time) == -1)
+        printf("clock_gettime function failure\n");
+    else {
+        cstate.set_last_notification_time(current_time);
+        EXPECT_EQ(cstate.get_last_notification_time().tv_sec, \
+            current_time.tv_sec);
+        EXPECT_EQ(cstate.get_last_notification_time().tv_nsec, \
+            current_time.tv_nsec);
+    }
+    eState.notification_timestamp = current_time.tv_sec;
+    eState.notification_timestamp *= NSEC_PER_SEC;
+    eState.notification_timestamp += current_time.tv_nsec;
+    eState.as_capable = true;
+    eState.offset_in_range = true;
+    eState.synced_to_primary_clock = true;
+    eState.composite_event = false;
+    eState.gm_changed = false;
+    eState.clock_offset = 0x1234;
+    eCount.as_capable_event_count = 0x2;
+    eCount.offset_in_range_event_count = 0x4;
+    cstate.set_eventState(eState);
+    cstate.set_eventStateCount(eCount);
+    EXPECT_EQ(cstate.get_eventStateCount().as_capable_event_count, 0x2);
+    EXPECT_EQ(cstate.get_eventStateCount().offset_in_range_event_count, 0x4);
+    EXPECT_EQ(cstate.get_eventState().as_capable, true);
+    EXPECT_EQ(cstate.get_eventState().composite_event, false);
+}