diff --git a/alternative_encodings/viscii.py b/alternative_encodings/viscii.py
index 87952e3..b555061 100644
--- a/alternative_encodings/viscii.py
+++ b/alternative_encodings/viscii.py
@@ -1,12 +1,6 @@
 import codecs
 
-from .common import (
-    get_codec,
-    get_incremental_decoder,
-    get_incremental_encoder,
-    get_stream_reader,
-    get_stream_writer,
-)
+from .common import get_codec, get_incremental_decoder, get_incremental_encoder, get_stream_reader, get_stream_writer
 
 # Decoding Table
 
diff --git a/tests/test_cp859.py b/tests/test_cp859.py
index 52ba0e3..48af44a 100644
--- a/tests/test_cp859.py
+++ b/tests/test_cp859.py
@@ -3,7 +3,7 @@
 import pytest
 from utils import register_codec
 
-import alternative_encodings.cp859 as cp859
+from alternative_encodings import cp859
 
 
 @pytest.fixture(scope="module", autouse=True)
@@ -24,6 +24,12 @@ def register_codec_fixture():
 )
 
 
-def test_encode():
+@pytest.mark.parametrize("source_data, encoded",
+    [
+        (source_data, encoded),
+        ('\r\n', b'\r\n'),
+    ]
+)
+def test_encode(source_data, encoded):
     assert codecs.encode(source_data, "cp859") == encoded
     assert codecs.decode(encoded, "cp859") == source_data
diff --git a/tests/test_cp866i.py b/tests/test_cp866i.py
index d38e23b..4f4e83b 100644
--- a/tests/test_cp866i.py
+++ b/tests/test_cp866i.py
@@ -3,7 +3,7 @@
 import pytest
 from utils import register_codec
 
-import alternative_encodings.cp866i as cp866i
+from alternative_encodings import cp866i
 
 
 @pytest.fixture(scope="module", autouse=True)
diff --git a/tests/test_general.py b/tests/test_general.py
new file mode 100644
index 0000000..d5cde09
--- /dev/null
+++ b/tests/test_general.py
@@ -0,0 +1,25 @@
+import codecs
+
+import pytest
+from utils import register_codec
+
+from alternative_encodings import cp859, cp866i, viscii
+
+codecs_pairs = [
+    ("cp859", cp859),
+    ("cp866i", cp866i),
+    ("viscii", viscii),
+]
+
+
+@pytest.mark.parametrize("string",
+    [
+        "\r\n",
+    ]
+)
+def test_general(string):
+    for codec_name, codec in codecs_pairs:
+        with register_codec(codec):
+            encoded = codecs.encode(string, encoding=codec_name)
+            decoded = codecs.decode(encoded, encoding=codec_name)
+            assert decoded == string
diff --git a/tests/test_viscii.py b/tests/test_viscii.py
index 1835b4b..10e87cf 100644
--- a/tests/test_viscii.py
+++ b/tests/test_viscii.py
@@ -3,7 +3,7 @@
 import pytest
 from utils import register_codec
 
-import alternative_encodings.viscii as viscii
+from alternative_encodings import viscii
 
 
 @pytest.fixture(scope="module", autouse=True)