diff --git a/cmake/tlcp_commands.cmake b/cmake/tlcp_commands.cmake
index e7fc0121..9b8e0e49 100644
--- a/cmake/tlcp_commands.cmake
+++ b/cmake/tlcp_commands.cmake
@@ -15,15 +15,26 @@ if(NOT EXISTS enckey.pem)
 	message(FATAL_ERROR "file does not exist")
 endif()
 
+set(TLCP_TEST_PORT 4431)
+file(REMOVE "tlcp_client.log" "tlcp_server.log")
+
+if(NOT WIN32)
+	execute_process(
+		COMMAND pkill -f "gmssl tlcp_server"
+		OUTPUT_QUIET
+		ERROR_QUIET
+	)
+endif()
+
 if(WIN32)
 	execute_process(
-		COMMAND cmd /c "start /B bin\\gmssl tlcp_server -port 4433 -cert tlcp_server_certs.pem -key signkey.pem -pass P@ssw0rd -ex_key enckey.pem -ex_pass P@ssw0rd > tlcp_server.log 2>&1"
+		COMMAND cmd /c "start /B bin\\gmssl tlcp_server -port ${TLCP_TEST_PORT} -cert tlcp_server_certs.pem -key signkey.pem -pass P@ssw0rd -ex_key enckey.pem -ex_pass P@ssw0rd > tlcp_server.log 2>&1"
 		RESULT_VARIABLE SERVER_RESULT
 		TIMEOUT 5
 	)
 else()
 	execute_process(
-		COMMAND bash -c "nohup bin/gmssl tlcp_server -port 4433 -cert tlcp_server_certs.pem -key signkey.pem -pass P@ssw0rd -ex_key enckey.pem -ex_pass P@ssw0rd > tlcp_server.log 2>&1 &"
+		COMMAND bash -c "nohup bin/gmssl tlcp_server -port ${TLCP_TEST_PORT} -cert tlcp_server_certs.pem -key signkey.pem -pass P@ssw0rd -ex_key enckey.pem -ex_pass P@ssw0rd > tlcp_server.log 2>&1 &"
 		RESULT_VARIABLE SERVER_RESULT
 		TIMEOUT 5
 	)
@@ -37,26 +48,43 @@ execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 2)
 
 if (WIN32)
 	execute_process(
-		COMMAND cmd /c "start /B bin\\gmssl tlcp_client -host localhost -port 4433 -cacert rootcacert.pem > tlcp_client.log 2>&1"
+		COMMAND cmd /c "start /B bin\\gmssl tlcp_client -host localhost -port ${TLCP_TEST_PORT} -cacert rootcacert.pem > tlcp_client.log 2>&1"
 		RESULT_VARIABLE CLIENT_RESULT
 		TIMEOUT 5
 	)
 else()
 	execute_process(
-		COMMAND bash -c "bin/gmssl tlcp_client -host localhost -port 4433 -cacert rootcacert.pem > tlcp_client.log 2>&1"
+		COMMAND bash -c "bin/gmssl tlcp_client -host localhost -port ${TLCP_TEST_PORT} -cacert rootcacert.pem < /dev/null > tlcp_client.log 2>&1 &"
 		RESULT_VARIABLE CLIENT_RESULT
 		TIMEOUT 5
 	)
 endif()
 
-file(READ "tlcp_client.log" CLIENT_LOG_CONTENT)
-string(FIND "${CLIENT_LOG_CONTENT}" "Connection established" FOUND_INDEX)
+set(FOUND_INDEX -1)
+foreach(i RANGE 1 15)
+	if(EXISTS "tlcp_client.log")
+		file(READ "tlcp_client.log" CLIENT_LOG_CONTENT)
+		string(FIND "${CLIENT_LOG_CONTENT}" "Connection established" FOUND_INDEX)
+		if(NOT ${FOUND_INDEX} EQUAL -1)
+			break()
+		endif()
+	endif()
+	execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 1)
+endforeach()
+
+if(NOT WIN32)
+	execute_process(
+		COMMAND pkill -f "gmssl tlcp_server"
+		OUTPUT_QUIET
+		ERROR_QUIET
+	)
+	execute_process(
+		COMMAND pkill -f "gmssl tlcp_client"
+		OUTPUT_QUIET
+		ERROR_QUIET
+	)
+endif()
 
 if(${FOUND_INDEX} EQUAL -1)
 	message(FATAL_ERROR "Client did not establish connection with server.")
 endif()
-
-execute_process(
-	COMMAND pkill -f "gmssl"
-)
-
diff --git a/cmake/tls12_commands.cmake b/cmake/tls12_commands.cmake
index 244848d4..4207a0d9 100644
--- a/cmake/tls12_commands.cmake
+++ b/cmake/tls12_commands.cmake
@@ -15,8 +15,17 @@ if(NOT EXISTS enckey.pem)
 	message(FATAL_ERROR "file does not exist")
 endif()
 
+set(TLS12_TEST_PORT 4432)
+file(REMOVE "tls12_client.log" "tls12_server.log")
+
 execute_process(
-	COMMAND bash -c "nohup bin/gmssl tls12_server -port 4333 -cert tls_server_certs.pem -key signkey.pem -pass P@ssw0rd > tls12_server.log 2>&1 &"
+	COMMAND pkill -f "gmssl tls12_server"
+	OUTPUT_QUIET
+	ERROR_QUIET
+)
+
+execute_process(
+	COMMAND bash -c "nohup bin/gmssl tls12_server -port ${TLS12_TEST_PORT} -cert tls_server_certs.pem -key signkey.pem -pass P@ssw0rd > tls12_server.log 2>&1 &"
 	RESULT_VARIABLE SERVER_RESULT
 	TIMEOUT 5
 )
@@ -27,19 +36,34 @@ endif()
 execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 2)
 
 execute_process(
-	COMMAND bash -c "bin/gmssl tls12_client -host localhost -port 4333 -cacert rootcacert.pem > tls12_client.log 2>&1"
+	COMMAND bash -c "bin/gmssl tls12_client -host localhost -port ${TLS12_TEST_PORT} -cacert rootcacert.pem < /dev/null > tls12_client.log 2>&1 &"
 	RESULT_VARIABLE CLIENT_RESULT
 	TIMEOUT 5
 )
 
-file(READ "tls12_client.log" CLIENT_LOG_CONTENT)
-string(FIND "${CLIENT_LOG_CONTENT}" "Connection established" FOUND_INDEX)
+set(FOUND_INDEX -1)
+foreach(i RANGE 1 15)
+	if(EXISTS "tls12_client.log")
+		file(READ "tls12_client.log" CLIENT_LOG_CONTENT)
+		string(FIND "${CLIENT_LOG_CONTENT}" "Connection established" FOUND_INDEX)
+		if(NOT ${FOUND_INDEX} EQUAL -1)
+			break()
+		endif()
+	endif()
+	execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 1)
+endforeach()
+
+execute_process(
+	COMMAND pkill -f "gmssl tls12_server"
+	OUTPUT_QUIET
+	ERROR_QUIET
+)
+execute_process(
+	COMMAND pkill -f "gmssl tls12_client"
+	OUTPUT_QUIET
+	ERROR_QUIET
+)
 
 if(${FOUND_INDEX} EQUAL -1)
 	message(FATAL_ERROR "Client did not establish connection with server.")
 endif()
-
-execute_process(
-	COMMAND pkill -f "gmssl"
-)
-
diff --git a/cmake/tls13_commands.cmake b/cmake/tls13_commands.cmake
index 8a7160a3..06e6295d 100644
--- a/cmake/tls13_commands.cmake
+++ b/cmake/tls13_commands.cmake
@@ -11,6 +11,9 @@ if(NOT EXISTS signkey.pem)
 	message(FATAL_ERROR "file does not exist")
 endif()
 
+set(TLS13_TEST_PORT 4433)
+file(REMOVE "tls13_client.log" "tls13_server.log")
+
 execute_process(
 	COMMAND pkill -f "gmssl tls13_server"
 	OUTPUT_QUIET
@@ -18,7 +21,7 @@ execute_process(
 )
 
 execute_process(
-	COMMAND bash -c "nohup bin/gmssl tls13_server -port 4443 -cert tls_server_certs.pem -key signkey.pem -pass P@ssw0rd -cipher_suite TLS_SM4_GCM_SM3 -supported_group sm2p256v1 -sig_alg sm2sig_sm3 > tls13_server.log 2>&1 &"
+	COMMAND bash -c "nohup bin/gmssl tls13_server -port ${TLS13_TEST_PORT} -cert tls_server_certs.pem -key signkey.pem -pass P@ssw0rd -cipher_suite TLS_SM4_GCM_SM3 -supported_group sm2p256v1 -sig_alg sm2sig_sm3 > tls13_server.log 2>&1 &"
 	RESULT_VARIABLE SERVER_RESULT
 	TIMEOUT 5
 )
@@ -29,17 +32,33 @@ endif()
 execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 2)
 
 execute_process(
-	COMMAND bash -c "bin/gmssl tls13_client -host localhost -port 4443 -cacert rootcacert.pem -cipher_suite TLS_SM4_GCM_SM3 -supported_group sm2p256v1 -sig_alg sm2sig_sm3 > tls13_client.log 2>&1"
+	COMMAND bash -c "bin/gmssl tls13_client -host localhost -port ${TLS13_TEST_PORT} -cacert rootcacert.pem -cipher_suite TLS_SM4_GCM_SM3 -supported_group sm2p256v1 -sig_alg sm2sig_sm3 < /dev/null > tls13_client.log 2>&1 &"
 	RESULT_VARIABLE CLIENT_RESULT
 	TIMEOUT 5
 )
 
+set(FOUND_INDEX -1)
+foreach(i RANGE 1 15)
+	if(EXISTS "tls13_client.log")
+		file(READ "tls13_client.log" CLIENT_LOG_CONTENT)
+		string(FIND "${CLIENT_LOG_CONTENT}" "connected" FOUND_INDEX)
+		if(NOT ${FOUND_INDEX} EQUAL -1)
+			break()
+		endif()
+	endif()
+	execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 1)
+endforeach()
+
 execute_process(
 	COMMAND pkill -f "gmssl tls13_server"
+	OUTPUT_QUIET
+	ERROR_QUIET
+)
+execute_process(
+	COMMAND pkill -f "gmssl tls13_client"
+	OUTPUT_QUIET
+	ERROR_QUIET
 )
-
-file(READ "tls13_client.log" CLIENT_LOG_CONTENT)
-string(FIND "${CLIENT_LOG_CONTENT}" "connected" FOUND_INDEX)
 
 if(${FOUND_INDEX} EQUAL -1)
 	message(FATAL_ERROR "Client did not establish connection with server.")