Fixed a broken test

flask/testsuite/basic.py

@@ -11,11 +11,12 @@
 
 import re
 import uuid
+import time
 import flask
 import pickle
 import unittest
 from datetime import datetime
-from threading import Thread, Condition
+from threading import Thread
 from flask.testsuite import FlaskTestCase, emits_module_deprecation_warning
 from flask._compat import text_type
 from werkzeug.exceptions import BadRequest, NotFound
@@ -1018,18 +1019,17 @@ class BasicFunctionalityTestCase(FlaskTestCase):
     def test_before_first_request_functions_concurrent(self):
         got = []
         app = flask.Flask(__name__)
-        cv = Condition()
+
         @app.before_first_request
         def foo():
-            with cv:
-                cv.wait()
+            time.sleep(0.2)
             got.append(42)
+
         c = app.test_client()
         def get_and_assert():
-            with cv:
-                cv.notify()
             c.get("/")
             self.assert_equal(got, [42])
+
         t = Thread(target=get_and_assert)
         t.start()
         get_and_assert()