diff --git a/s3tests/functional/test_s3.py b/s3tests/functional/test_s3.py
index 7f9a495..cd6ce9d 100644
--- a/s3tests/functional/test_s3.py
+++ b/s3tests/functional/test_s3.py
@@ -2884,6 +2884,48 @@ def test_multipart_upload():
     upload = _multipart_upload(bucket, key, 30)
     upload.complete_upload()
 
+
+@attr(resource='object')
+@attr(method='put')
+@attr(operation='check contents of multi-part upload')
+@attr(assertion='successful')
+def test_multipart_upload_contents():
+    bucket = get_new_bucket()
+    key_name="mymultipart"
+    num_parts=5
+    payload='foo'*10*1024*1024
+    mp=bucket.initiate_multipart_upload(key_name)
+    for i in range(0, num_parts):
+        mp.upload_part_from_file(StringIO(payload), i+1)
+
+    mp.complete_upload()
+    key=bucket.get_key(key_name)
+    test_string=key.get_contents_as_string()
+    assert test_string == payload*num_parts
+
+
+@attr(resource='object')
+@attr(method='put')
+@attr(operation=' multi-part upload overwrites existing key')
+@attr(assertion='successful')
+def test_multipart_upload_overwrite_existing_object():
+    bucket = get_new_bucket()
+    key_name="mymultipart"
+    payload='bar'*10*1024*1024
+    num_parts=5
+    key=bucket.new_key(key_name)
+    key.set_contents_from_string(payload)
+
+    mp=bucket.initiate_multipart_upload(key_name)
+    for i in range(0, num_parts):
+        mp.upload_part_from_file(StringIO(payload), i+1)
+
+    mp.complete_upload()
+    key=bucket.get_key(key_name)
+    test_string=key.get_contents_as_string()
+    assert test_string == payload*num_parts
+
+
 @attr(resource='object')
 @attr(method='put')
 @attr(operation='abort multi-part upload')