diff --git a/examples b/examples
index c3f6d1f1..f0f4e097 160000
--- a/examples
+++ b/examples
@@ -1 +1 @@
-Subproject commit c3f6d1f17e6a901dc82c3bec462fcccda0cecbc9
+Subproject commit f0f4e0971b0f9f7b4d77a47cb436f910bf3b4add
diff --git a/platformio/commands/test/processor.py b/platformio/commands/test/processor.py
index cfc0f3ca..9f1b12c8 100644
--- a/platformio/commands/test/processor.py
+++ b/platformio/commands/test/processor.py
@@ -25,33 +25,33 @@ TRANSPORT_OPTIONS = {
     "arduino": {
         "include": "#include <Arduino.h>",
         "object": "",
-        "putchar": "Serial.write(c)",
-        "flush": "Serial.flush()",
-        "begin": "Serial.begin($baudrate)",
-        "end": "Serial.end()",
+        "putchar": "Serial.write(c);",
+        "flush": "Serial.flush();",
+        "begin": "Serial.begin($baudrate);",
+        "end": "Serial.end();",
         "language": "cpp",
     },
     "mbed": {
         "include": "#include <mbed.h>",
-        "object": "Serial pc(USBTX, USBRX);",
-        "putchar": "pc.putc(c)",
+        "object": "#if MBED_MAJOR_VERSION == 6\nUnbufferedSerial pc(USBTX, USBRX);\n#else\nRawSerial pc(USBTX, USBRX);\n#endif",
+        "putchar": "#if MBED_MAJOR_VERSION == 6\npc.write(&c, 1);\n#else\npc.putc(c);\n#endif",
         "flush": "",
-        "begin": "pc.baud($baudrate)",
+        "begin": "pc.baud($baudrate);",
         "end": "",
         "language": "cpp",
     },
     "espidf": {
         "include": "#include <stdio.h>",
         "object": "",
-        "putchar": "putchar(c)",
-        "flush": "fflush(stdout)",
+        "putchar": "putchar(c);",
+        "flush": "fflush(stdout);",
         "begin": "",
         "end": "",
     },
     "zephyr": {
         "include": "#include <sys/printk.h>",
         "object": "",
-        "putchar": 'printk("%c", c)',
+        "putchar": 'printk("%c", c);',
         "flush": "",
         "begin": "",
         "end": "",
@@ -59,18 +59,18 @@ TRANSPORT_OPTIONS = {
     "native": {
         "include": "#include <stdio.h>",
         "object": "",
-        "putchar": "putchar(c)",
-        "flush": "fflush(stdout)",
+        "putchar": "putchar(c);",
+        "flush": "fflush(stdout);",
         "begin": "",
         "end": "",
     },
     "custom": {
         "include": '#include "unittest_transport.h"',
         "object": "",
-        "putchar": "unittest_uart_putchar(c)",
-        "flush": "unittest_uart_flush()",
-        "begin": "unittest_uart_begin()",
-        "end": "unittest_uart_end()",
+        "putchar": "unittest_uart_putchar(c);",
+        "flush": "unittest_uart_flush();",
+        "begin": "unittest_uart_begin();",
+        "end": "unittest_uart_end();",
         "language": "cpp",
     },
 }
@@ -174,22 +174,22 @@ class TestProcessorBase(object):
                 "void output_start(unsigned int baudrate)",
                 "#endif",
                 "{",
-                "    $begin;",
+                "    $begin",
                 "}",
                 "",
                 "void output_char(int c)",
                 "{",
-                "    $putchar;",
+                "    $putchar",
                 "}",
                 "",
                 "void output_flush(void)",
                 "{",
-                "    $flush;",
+                "    $flush",
                 "}",
                 "",
                 "void output_complete(void)",
                 "{",
-                "   $end;",
+                "   $end",
                 "}",
             ]
         )