diff --git a/uasyncio_iostream/tests/iotest1.py b/uasyncio_iostream/tests/iotest1.py
index 25c98f3..c46b4b5 100644
--- a/uasyncio_iostream/tests/iotest1.py
+++ b/uasyncio_iostream/tests/iotest1.py
@@ -11,8 +11,7 @@ MP_STREAM_POLL = const(3)
 MP_STREAM_ERROR = const(-1)
 
 def printbuf(this_io):
-    for ch in this_io.wbuf[:this_io.wprint_len]:
-        print(chr(ch), end='')
+    print(bytes(this_io.wbuf[:this_io.wprint_len]).decode(), end='')
 
 class MyIO(io.IOBase):
     def __init__(self):
diff --git a/uasyncio_iostream/tests/iotest2.py b/uasyncio_iostream/tests/iotest2.py
index 7dc4605..e538305 100644
--- a/uasyncio_iostream/tests/iotest2.py
+++ b/uasyncio_iostream/tests/iotest2.py
@@ -12,8 +12,7 @@ MP_STREAM_POLL = const(3)
 MP_STREAM_ERROR = const(-1)
 
 def printbuf(this_io):
-    for ch in this_io.wbuf[:this_io.wprint_len]:
-        print(chr(ch), end='')
+    print(bytes(this_io.wbuf[:this_io.wprint_len]).decode(), end='')
     this_io.wbuf = b''
 
 class MyIO(io.IOBase):
diff --git a/uasyncio_iostream/tests/iotest3.py b/uasyncio_iostream/tests/iotest3.py
index 74fa44d..cf1e785 100644
--- a/uasyncio_iostream/tests/iotest3.py
+++ b/uasyncio_iostream/tests/iotest3.py
@@ -51,8 +51,7 @@ class MyIOR(io.IOBase):
 # a ready status. For the demo it stores the characters in .wbuf for printing.
 
 def printbuf(this_io):
-    for x in range(this_io.wprint_len):
-        print(chr(this_io.wbuf[x]), end = '')
+    print(bytes(this_io.wbuf[:this_io.wprint_len]).decode(), end='')
 
 class MyIOW(io.IOBase):
     def __init__(self):
diff --git a/uasyncio_iostream/tests/iotest4.py b/uasyncio_iostream/tests/iotest4.py
index d28ea06..6b5c77f 100644
--- a/uasyncio_iostream/tests/iotest4.py
+++ b/uasyncio_iostream/tests/iotest4.py
@@ -20,8 +20,7 @@ MP_STREAM_POLL = const(3)
 MP_STREAM_ERROR = const(-1)
 
 def printbuf(this_io):
-    for ch in this_io.wbuf[:this_io.wprint_len]:
-        print(chr(ch), end='')
+    print(bytes(this_io.wbuf[:this_io.wprint_len]).decode(), end='')
 
 class MyIO(io.IOBase):
     def __init__(self, read=False, write=False):
diff --git a/uasyncio_iostream/tests/iotest5.py b/uasyncio_iostream/tests/iotest5.py
index b6b0da5..54e4d73 100644
--- a/uasyncio_iostream/tests/iotest5.py
+++ b/uasyncio_iostream/tests/iotest5.py
@@ -20,8 +20,7 @@ MP_STREAM_POLL = const(3)
 MP_STREAM_ERROR = const(-1)
 
 def printbuf(this_io):
-    for ch in this_io.wbuf[:this_io.wprint_len]:
-        print(chr(ch), end='')
+    print(bytes(this_io.wbuf[:this_io.wprint_len]).decode(), end='')
 
 class MyIO(io.IOBase):
     def __init__(self, read=False, write=False):