diff --git a/examples/protocols/asio/chat_client/asio_chat_client_test.py b/examples/protocols/asio/chat_client/asio_chat_client_test.py
index 3b141c7d1..f5581796d 100644
--- a/examples/protocols/asio/chat_client/asio_chat_client_test.py
+++ b/examples/protocols/asio/chat_client/asio_chat_client_test.py
@@ -7,6 +7,7 @@ import time
 
 try:
     import IDF
+    from IDF.IDFDUT import ESP32DUT
 except ImportError:
     # this is a test case write with tiny-test-fw.
     # to run test cases outside tiny-test-fw,
@@ -69,7 +70,7 @@ def test_examples_protocol_asio_chat_client(env, extra_data):
     global g_client_response
     global g_msg_to_client
     test_msg = "ABC"
-    dut1 = env.get_dut("chat_client", "examples/protocols/asio/chat_client")
+    dut1 = env.get_dut("chat_client", "examples/protocols/asio/chat_client", dut_class=ESP32DUT)
     # check and log bin size
     binary_file = os.path.join(dut1.app.binary_path, "asio_chat_client.bin")
     bin_size = os.path.getsize(binary_file)
diff --git a/examples/protocols/asio/chat_server/asio_chat_server_test.py b/examples/protocols/asio/chat_server/asio_chat_server_test.py
index ea4702c4e..5d53a8946 100644
--- a/examples/protocols/asio/chat_server/asio_chat_server_test.py
+++ b/examples/protocols/asio/chat_server/asio_chat_server_test.py
@@ -6,6 +6,7 @@ import socket
 
 try:
     import IDF
+    from IDF.IDFDUT import ESP32DUT
 except ImportError:
     # this is a test case write with tiny-test-fw.
     # to run test cases outside tiny-test-fw,
@@ -27,7 +28,7 @@ def test_examples_protocol_asio_chat_server(env, extra_data):
       4. Test evaluates received test message from server
     """
     test_msg = b"   4ABC\n"
-    dut1 = env.get_dut("chat_server", "examples/protocols/asio/chat_server")
+    dut1 = env.get_dut("chat_server", "examples/protocols/asio/chat_server", dut_class=ESP32DUT)
     # check and log bin size
     binary_file = os.path.join(dut1.app.binary_path, "asio_chat_server.bin")
     bin_size = os.path.getsize(binary_file)
diff --git a/examples/protocols/asio/tcp_echo_server/asio_tcp_server_test.py b/examples/protocols/asio/tcp_echo_server/asio_tcp_server_test.py
index 2cdfd45ae..aeb7faced 100644
--- a/examples/protocols/asio/tcp_echo_server/asio_tcp_server_test.py
+++ b/examples/protocols/asio/tcp_echo_server/asio_tcp_server_test.py
@@ -6,6 +6,7 @@ import socket
 
 try:
     import IDF
+    from IDF.IDFDUT import ESP32DUT
 except ImportError:
     # this is a test case write with tiny-test-fw.
     # to run test cases outside tiny-test-fw,
@@ -29,7 +30,7 @@ def test_examples_protocol_asio_tcp_server(env, extra_data):
       5. Test evaluates received test message on server stdout
     """
     test_msg = b"echo message from client to server"
-    dut1 = env.get_dut("tcp_echo_server", "examples/protocols/asio/tcp_echo_server")
+    dut1 = env.get_dut("tcp_echo_server", "examples/protocols/asio/tcp_echo_server", dut_class=ESP32DUT)
     # check and log bin size
     binary_file = os.path.join(dut1.app.binary_path, "asio_tcp_echo_server.bin")
     bin_size = os.path.getsize(binary_file)
diff --git a/examples/protocols/asio/udp_echo_server/asio_udp_server_test.py b/examples/protocols/asio/udp_echo_server/asio_udp_server_test.py
index dc2cc78a8..dac320068 100644
--- a/examples/protocols/asio/udp_echo_server/asio_udp_server_test.py
+++ b/examples/protocols/asio/udp_echo_server/asio_udp_server_test.py
@@ -6,6 +6,7 @@ import socket
 
 try:
     import IDF
+    from IDF.IDFDUT import ESP32DUT
 except ImportError:
     # this is a test case write with tiny-test-fw.
     # to run test cases outside tiny-test-fw,
@@ -29,7 +30,7 @@ def test_examples_protocol_asio_udp_server(env, extra_data):
       5. Test evaluates received test message on server stdout
     """
     test_msg = b"echo message from client to server"
-    dut1 = env.get_dut("udp_echo_server", "examples/protocols/asio/udp_echo_server")
+    dut1 = env.get_dut("udp_echo_server", "examples/protocols/asio/udp_echo_server", dut_class=ESP32DUT)
     # check and log bin size
     binary_file = os.path.join(dut1.app.binary_path, "asio_udp_echo_server.bin")
     bin_size = os.path.getsize(binary_file)