diff --git a/tests/unit/split_buffer_test.py b/tests/unit/split_buffer_test.py
index a78e99a6..41dc50e4 100644
--- a/tests/unit/split_buffer_test.py
+++ b/tests/unit/split_buffer_test.py
@@ -6,32 +6,47 @@ from .. import unittest
 class SplitBufferTest(unittest.TestCase):
     def test_single_line_chunks(self):
         def reader():
-            yield "abc\n"
-            yield "def\n"
-            yield "ghi\n"
+            yield b'abc\n'
+            yield b'def\n'
+            yield b'ghi\n'
 
-        self.assertEqual(list(split_buffer(reader(), '\n')), ["abc\n", "def\n", "ghi\n"])
+        self.assert_produces(reader, [b'abc\n', b'def\n', b'ghi\n'])
 
     def test_no_end_separator(self):
         def reader():
-            yield "abc\n"
-            yield "def\n"
-            yield "ghi"
+            yield b'abc\n'
+            yield b'def\n'
+            yield b'ghi'
 
-        self.assertEqual(list(split_buffer(reader(), '\n')), ["abc\n", "def\n", "ghi"])
+        self.assert_produces(reader, [b'abc\n', b'def\n', b'ghi'])
 
     def test_multiple_line_chunk(self):
         def reader():
-            yield "abc\ndef\nghi"
+            yield b'abc\ndef\nghi'
 
-        self.assertEqual(list(split_buffer(reader(), '\n')), ["abc\n", "def\n", "ghi"])
+        self.assert_produces(reader, [b'abc\n', b'def\n', b'ghi'])
 
     def test_chunked_line(self):
         def reader():
-            yield "a"
-            yield "b"
-            yield "c"
-            yield "\n"
-            yield "d"
+            yield b'a'
+            yield b'b'
+            yield b'c'
+            yield b'\n'
+            yield b'd'
 
-        self.assertEqual(list(split_buffer(reader(), '\n')), ["abc\n", "d"])
+        self.assert_produces(reader, [b'abc\n', b'd'])
+
+    def test_preserves_unicode_sequences_within_lines(self):
+        string = u"a\u2022c\n".encode('utf-8')
+
+        def reader():
+            yield string
+
+        self.assert_produces(reader, [string])
+
+    def assert_produces(self, reader, expectations):
+        split = split_buffer(reader(), b'\n')
+
+        for (actual, expected) in zip(split, expectations):
+            self.assertEqual(type(actual), type(expected))
+            self.assertEqual(actual, expected)