We need one patch on top of 0.3.8 for compatibility with Werkzeug 1.0.

Taken from upstream:
https://github.com/flask-restful/flask-restful/commit/73376a488907af3042b52678ac4c23f8a8911e5b

diff --git a/tests/test_api.py b/tests/test_api.py
index f7f8e661..6795d362 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -445,7 +445,9 @@ def test_handle_non_api_error(self):
 
         resp = app.get("/foo")
         self.assertEquals(resp.status_code, 404)
-        self.assertEquals('text/html', resp.headers['Content-Type'])
+        # in newer versions of werkzeug this is `text/html; charset=utf8`
+        content_type, _, _ = resp.headers['Content-Type'].partition(';')
+        self.assertEquals('text/html', content_type)
 
     def test_non_api_error_404_catchall(self):
         app = Flask(__name__)
diff --git a/tests/test_reqparse.py b/tests/test_reqparse.py
index 2f1fbedf..9776f17c 100644
--- a/tests/test_reqparse.py
+++ b/tests/test_reqparse.py
@@ -2,9 +2,9 @@
 import unittest
 from mock import Mock, patch
 from flask import Flask
-from werkzeug import exceptions, MultiDict
+from werkzeug import exceptions
 from werkzeug.wrappers import Request
-from werkzeug.datastructures import FileStorage
+from werkzeug.datastructures import FileStorage, MultiDict
 from flask_restful.reqparse import Argument, RequestParser, Namespace
 import six
 import decimal
</a><a href='/guix/diff/tests/npm-binary.scm?id=abffb41c097ce2277b4220f9bd5660fc75b3f0ab'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/npm-binary.scm'>
<input type='hidden' name='id' value='abffb41c097ce2277b4220f9bd5660fc75b3f0ab'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=abffb41c097ce2277b4220f9bd5660fc75b3f0ab'>root</a>/<a href='/guix/log/tests?id=abffb41c097ce2277b4220f9bd5660fc75b3f0ab'>tests</a>/<a href='/guix/log/tests/npm-binary.scm?id=abffb41c097ce2277b4220f9bd5660fc75b3f0ab'>npm-binary.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/npm-binary.scm?id=abffb41c097ce2277b4220f9bd5660fc75b3f0ab&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-05-19 16:05:00 +0200'>2024-05-19</span></td><td><a href='/guix/commit/tests/npm-binary.scm?id=0685042c4601e7e7a88aab9c1cbfbfb4092a5aa2'>import: Add binary npm importer.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/import.scm: (importers): Add "npm-binary".
* doc/guix.texi (Invoking guix import): Document npm-binary importer.
* guix/import/npm-binary.scm: New file.
* guix/scripts/import/npm-binary.scm: New file.
* tests/npm-binary.scm: New file.
* Makefile.am: Add them.

Co-authored-by: Timothy Sample &lt;samplet@ngyro.com&gt;
Co-authored-by: Lars-Dominik Braun &lt;lars@6xq.net&gt;

Change-Id: I98a45068cf5b9c42790664cc743feaa7ac76f807
</span></span></td><td>Jelle Licht</td></tr>