diff --git a/.coveragerc b/.coveragerc
index 894602930..dbdb75230 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,3 +1,4 @@
 [run]
 omit =
-    pymodbus/repl/*
\ No newline at end of file
+    pymodbus/repl/*
+    pymodbus/internal/*
\ No newline at end of file
diff --git a/pymodbus/framer/ascii_framer.py b/pymodbus/framer/ascii_framer.py
index f98bdca7b..a88f6499f 100644
--- a/pymodbus/framer/ascii_framer.py
+++ b/pymodbus/framer/ascii_framer.py
@@ -1,16 +1,10 @@
 import struct
-import socket
 from binascii import b2a_hex, a2b_hex
 
 from pymodbus.exceptions import ModbusIOException
 from pymodbus.utilities import checkLRC, computeLRC
 from pymodbus.framer import ModbusFramer, FRAME_HEADER, BYTE_ORDER
 
-# Python 2 compatibility.
-try:
-    TimeoutError
-except NameError:
-    TimeoutError = socket.timeout
 
 ASCII_FRAME_HEADER = BYTE_ORDER + FRAME_HEADER
 
diff --git a/test/test_framers.py b/test/test_framers.py
index 4423bb9c3..c11c72f37 100644
--- a/test/test_framers.py
+++ b/test/test_framers.py
@@ -12,18 +12,22 @@
 else:  # Python 2
     from mock import Mock
 
+
 @pytest.fixture
 def rtu_framer():
     return ModbusRtuFramer(ClientDecoder())
 
+
 @pytest.fixture
 def ascii_framer():
     return ModbusAsciiFramer(ClientDecoder())
 
+
 @pytest.fixture
 def binary_framer():
     return ModbusBinaryFramer(ClientDecoder())
 
+
 @pytest.mark.parametrize("framer",  [ModbusRtuFramer,
                                      ModbusAsciiFramer,
                                      ModbusBinaryFramer,
@@ -116,9 +120,12 @@ def test_populate_result(rtu_framer):
     assert result.unit_id == 255
 
 
-def test_process_incoming_packet(rtu_framer):
+@pytest.mark.parametrize('framer', [ascii_framer, rtu_framer, binary_framer])
+def test_process_incoming_packet(framer):
     def cb(res):
         return res
+    # data = b''
+    # framer.processIncomingPacket(data, cb, unit=1, single=False)
 
 
 def test_build_packet(rtu_framer):
@@ -160,4 +167,22 @@ def cb(res):
 
 def test_get_raw_frame(rtu_framer):
     rtu_framer._buffer = b'\x00\x01\x00\x01\x00\n\xec\x1c'
-    assert rtu_framer.getRawFrame() == rtu_framer._buffer
\ No newline at end of file
+    assert rtu_framer.getRawFrame() == rtu_framer._buffer
+
+
+def test_validate_unit_id(rtu_framer):
+    rtu_framer.populateHeader( b'\x00\x01\x00\x01\x00\n\xec\x1c')
+    assert rtu_framer._validate_unit_id([0], False)
+    assert rtu_framer._validate_unit_id([1], True)
+
+
+@pytest.mark.parametrize('data', [b':010100010001FC\r\n',
+                         b''])
+def test_decode_ascii_data(ascii_framer, data):
+    data = ascii_framer.decode_data(data)
+    assert isinstance(data, dict)
+    if data:
+        assert data.get("unit") == 1
+        assert data.get("fcode") == 1
+    else:
+        assert not data
\ No newline at end of file