diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
index f0f4ab96b8f3e..621af6895f4d5 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
@@ -432,6 +432,8 @@ do_transfer()
 	local stat_ackrx_last_l=$(get_mib_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
 	local stat_cookietx_last=$(get_mib_counter "${listener_ns}" "TcpExtSyncookiesSent")
 	local stat_cookierx_last=$(get_mib_counter "${listener_ns}" "TcpExtSyncookiesRecv")
+	local stat_csum_err_s=$(get_mib_counter "${listener_ns}" "MPTcpExtDataCsumErr")
+	local stat_csum_err_c=$(get_mib_counter "${connector_ns}" "MPTcpExtDataCsumErr")
 
 	timeout ${timeout_test} \
 		ip netns exec ${listener_ns} \
@@ -524,6 +526,23 @@ do_transfer()
 		fi
 	fi
 
+	if $checksum; then
+		local csum_err_s=$(get_mib_counter "${listener_ns}" "MPTcpExtDataCsumErr")
+		local csum_err_c=$(get_mib_counter "${connector_ns}" "MPTcpExtDataCsumErr")
+
+		local csum_err_s_nr=$((csum_err_s - stat_csum_err_s))
+		if [ $csum_err_s_nr -gt 0 ]; then
+			printf "[ FAIL ]\nserver got $csum_err_s_nr data checksum error[s]"
+			rets=1
+		fi
+
+		local csum_err_c_nr=$((csum_err_c - stat_csum_err_c))
+		if [ $csum_err_c_nr -gt 0 ]; then
+			printf "[ FAIL ]\nclient got $csum_err_c_nr data checksum error[s]"
+			retc=1
+		fi
+	fi
+
 	if [ $retc -eq 0 ] && [ $rets -eq 0 ]; then
 		printf "[ OK ]"
 	fi