diff --git a/pyexcel_ods/odsr.py b/pyexcel_ods/odsr.py
index 1e13a62..f4b6c9e 100644
--- a/pyexcel_ods/odsr.py
+++ b/pyexcel_ods/odsr.py
@@ -22,8 +22,6 @@
 # limitations under the License.
 
 # Thanks to grt for the fixes
-from io import UnsupportedOperation
-
 from odf.teletype import extractText
 from odf.table import TableRow, TableCell, Table
 from odf.text import P
@@ -32,7 +30,7 @@
 
 from pyexcel_io.book import BookReader
 from pyexcel_io.sheet import SheetReader
-from pyexcel_io._compact import OrderedDict, BytesIO
+from pyexcel_io._compact import OrderedDict
 import pyexcel_io.service as service
 
 
@@ -104,16 +102,6 @@ def open(self, file_name, **keywords):
 
     def open_stream(self, file_stream, **keywords):
         """open ods file stream"""
-        if not hasattr(file_stream, 'seek'):
-            # python 2
-            # Hei zipfile in odfpy would do a seek
-            # but stream from urlib cannot do seek
-            file_stream = BytesIO(file_stream.read())
-        try:
-            file_stream.seek(0)
-        except UnsupportedOperation:
-            # python 3
-            file_stream = BytesIO(file_stream.read())
         BookReader.open_stream(self, file_stream, **keywords)
         self._load_from_memory()
 
diff --git a/pyexcel_ods/odsw.py b/pyexcel_ods/odsw.py
index 87856c5..3be88c2 100644
--- a/pyexcel_ods/odsw.py
+++ b/pyexcel_ods/odsw.py
@@ -17,7 +17,7 @@
 from pyexcel_io.book import BookWriter
 from pyexcel_io.sheet import SheetWriter
 
-import pyexcel_ods.converter as converter
+import pyexcel_io.service as converter
 
 PY2 = sys.version_info[0] == 2
 
diff --git a/tests/test_bug_fixes.py b/tests/test_bug_fixes.py
index 4bf4460..c5c3d89 100644
--- a/tests/test_bug_fixes.py
+++ b/tests/test_bug_fixes.py
@@ -24,25 +24,6 @@ def test_bug_fix_for_issue_2():
     assert new_data["Sheet 2"] == [[u'row 1', u'H\xe9ll\xf4!', u'Hol\xc1!']]
 
 
-def test_date_util_parse():
-    from pyexcel_ods.converter import date_value
-    value = "2015-08-17T19:20:00"
-    d = date_value(value)
-    assert d.strftime("%Y-%m-%dT%H:%M:%S") == "2015-08-17T19:20:00"
-    value = "2015-08-17"
-    d = date_value(value)
-    assert d.strftime("%Y-%m-%d") == "2015-08-17"
-    value = "2015-08-17T19:20:59.999999"
-    d = date_value(value)
-    assert d.strftime("%Y-%m-%dT%H:%M:%S") == "2015-08-17T19:20:59"
-    value = "2015-08-17T19:20:59.99999"
-    d = date_value(value)
-    assert d.strftime("%Y-%m-%dT%H:%M:%S") == "2015-08-17T19:20:59"
-    value = "2015-08-17T19:20:59.999999999999999"
-    d = date_value(value)
-    assert d.strftime("%Y-%m-%dT%H:%M:%S") == "2015-08-17T19:20:59"
-
-
 @raises(Exception)
 def test_invalid_date():
     from pyexcel_ods.ods import date_value