diff --git a/changelog.yml b/changelog.yml
index cdff924..15e5619 100644
--- a/changelog.yml
+++ b/changelog.yml
@@ -1,6 +1,12 @@
 name: pyexcel-io
 organisation: pyexcel
 releases:
+- changes:
+  - action: updated
+    details:
+    - "`#96`: regression: unknown file type shall trigger NoSupportingPluginFound"
+  version: 0.6.3
+  date: tbd
 - changes:
   - action: updated
     details:
diff --git a/pyexcel_io/reader.py b/pyexcel_io/reader.py
index ee45c89..f0276fa 100644
--- a/pyexcel_io/reader.py
+++ b/pyexcel_io/reader.py
@@ -1,5 +1,3 @@
-from pyexcel_io import exceptions
-from pyexcel_io.book import _convert_content_to_stream
 from pyexcel_io.sheet import SheetReader
 from pyexcel_io.plugins import NEW_READERS
 from pyexcel_io._compact import OrderedDict
@@ -53,23 +51,14 @@ def open(self, file_name, **keywords):
 
     def open_content(self, file_content, **keywords):
         self.keywords, native_sheet_keywords = clean_keywords(keywords)
-        try:
-            if self.reader_class is None:
-                self.reader_class = NEW_READERS.get_a_plugin(
-                    self.file_type, location="content", library=self.library
-                )
-            self.reader = self.reader_class(
-                file_content, self.file_type, **native_sheet_keywords
-            )
-            return self.reader
-        except (
-            exceptions.NoSupportingPluginFound,
-            exceptions.SupportingPluginAvailableButNotInstalled,
-        ):
-            file_stream = _convert_content_to_stream(
-                file_content, self.file_type
+        if self.reader_class is None:
+            self.reader_class = NEW_READERS.get_a_plugin(
+                self.file_type, location="content", library=self.library
             )
-            return self.open_stream(file_stream, **native_sheet_keywords)
+        self.reader = self.reader_class(
+            file_content, self.file_type, **native_sheet_keywords
+        )
+        return self.reader
 
     def open_stream(self, file_stream, **keywords):
         self.keywords, native_sheet_keywords = clean_keywords(keywords)
diff --git a/pyexcel_io/readers/__init__.py b/pyexcel_io/readers/__init__.py
index 063674c..e06ec19 100644
--- a/pyexcel_io/readers/__init__.py
+++ b/pyexcel_io/readers/__init__.py
@@ -29,4 +29,9 @@
     file_types=["csvz", "tsvz"],
     locations=["file", "memory"],
     stream_type="binary",
+).add_a_reader(
+    relative_plugin_class_path="csvz.ContentReader",
+    file_types=["csvz", "tsvz"],
+    locations=["content"],
+    stream_type="binary",
 )
diff --git a/pyexcel_io/readers/csvz.py b/pyexcel_io/readers/csvz.py
index 9fdc55e..9b87a9f 100644
--- a/pyexcel_io/readers/csvz.py
+++ b/pyexcel_io/readers/csvz.py
@@ -7,6 +7,7 @@
     :copyright: (c) 2014-2020 by Onni Software Ltd.
     :license: New BSD License, see LICENSE for more details
 """
+from io import BytesIO
 import zipfile
 
 import chardet
@@ -48,6 +49,12 @@ def read_sheet(self, index):
         return CSVinMemoryReader(NamedContent(name, sheet), **self.keywords)
 
 
+class ContentReader(FileReader):
+    def __init__(self, file_content, file_type, **keywords):
+        io = BytesIO(file_content)
+        super().__init__(io, file_type, **keywords)
+
+
 def _get_sheet_name(filename):
     len_of_a_dot = 1
     len_of_csv_word = 3
diff --git a/tests/test_issues.py b/tests/test_issues.py
index b7b9dd5..c2d2a56 100644
--- a/tests/test_issues.py
+++ b/tests/test_issues.py
@@ -1,13 +1,11 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
 import os
 
 import pyexcel as p
 from pyexcel_io import get_data, save_data
+from pyexcel_io.exceptions import NoSupportingPluginFound
 
 from nose import SkipTest
-from nose.tools import eq_
+from nose.tools import eq_, raises
 
 IN_TRAVIS = "TRAVIS" in os.environ
 
@@ -42,7 +40,7 @@ def test_issue_23():
 
 
 # def test_issue_28():
-#     from pyexcel_io.plugins import readers
+#     from pyexcel_io.plugins import OLD_READERS as readers
 #     from pyexcel_io.exceptions import UpgradePlugin
 #     expected = "Please upgrade the plugin '%s' according to "
 #     expected += "plugin compactibility table."
@@ -154,5 +152,10 @@ def test_pyexcel_issue_138():
     os.unlink("test.csv")
 
 
+@raises(NoSupportingPluginFound)
+def test_issue_96():
+    get_data("foo-bar-data", file_type="Idonotexist")
+
+
 def get_fixture(file_name):
     return os.path.join("tests", "fixtures", file_name)