diff --git a/Lib/test/test_StringIO.py b/Lib/test/test_StringIO.py
index 37a825f..42f307a 100644
--- a/Lib/test/test_StringIO.py
+++ b/Lib/test/test_StringIO.py
@@ -20,7 +20,6 @@
     constructor = str
 
     def setUp(self):
-        self._line = self.constructor(self._line)
         self._lines = self.constructor((self._line + '\n') * 5)
         self._fp = self.MODULE.StringIO(self._lines)
 
@@ -210,12 +209,16 @@
 class TestBuffercStringIO(TestcStringIO):
     constructor = buffer
 
+class TestMemoryviewcStringIO(TestcStringIO):
+    constructor = memoryview
+
 
 def test_main():
     test_support.run_unittest(TestStringIO, TestcStringIO)
     with test_support.check_py3k_warnings(("buffer.. not supported",
                                              DeprecationWarning)):
         test_support.run_unittest(TestBufferStringIO, TestBuffercStringIO)
+    test_support.run_unittest(TestMemoryviewcStringIO)
 
 if __name__ == '__main__':
     test_main()
diff --git a/Lib/test/test_struct.py b/Lib/test/test_struct.py
index c8dc6f1..f1b5d9a 100644
--- a/Lib/test/test_struct.py
+++ b/Lib/test/test_struct.py
@@ -496,6 +496,17 @@
 
             self.test_unpack_from(cls=buffer)
 
+    def test_unpack_with_memoryview(self):
+        with check_py3k_warnings(("buffer.. not supported in 3.x",
+                                  DeprecationWarning)):
+            # SF bug 1563759: struct.unpack doesn't support buffer protocol objects
+            data1 = memoryview('\x12\x34\x56\x78')
+            for data in [data1,]:
+                value, = struct.unpack('>I', data)
+                self.assertEqual(value, 0x12345678)
+
+            self.test_unpack_from(cls=memoryview)
+
     def test_bool(self):
         class ExplodingBool(object):
             def __nonzero__(self):