diff --git a/tests/test_client.py b/tests/test_client.py
index a2ce5a8..25d1da1 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -15,6 +15,7 @@
 
 import datetime
 import io
+import functools
 import json
 import pickle
 
@@ -23,8 +24,10 @@
 from vt import Client
 from vt import Object
 
+from tests import wsgi_app
 
-def new_client(httpserver):
+
+def new_client(httpserver, unused_apikey=''):
   return Client(
       "dummy_api_key",
       host="http://" + httpserver.host + ":" + str(httpserver.port),
@@ -480,3 +483,26 @@ def test_user_headers(httpserver):
   assert "Accept-Encoding" in headers
   assert "User-Agent" in headers
   assert "foo" in headers
+
+
+def test_wsgi_app(httpserver, monkeypatch):
+  app = wsgi_app.app
+  app.config.update({'TESTING': True})
+  client = app.test_client()
+  expected_response = {'data': {
+      'id': 'google.com',
+      'type': 'domain',
+      'attributes': {'foo': 'foo'},
+  }}
+
+
+  httpserver.expect_request(
+      "/api/v3/domains/google.com", method="GET",
+      headers={"X-Apikey": "dummy_api_key"}
+  ).respond_with_json(expected_response)
+  monkeypatch.setattr(
+      'tests.wsgi_app.vt.Client', functools.partial(new_client, httpserver)
+  )
+  response = client.get('/')
+  assert response.status_code == 200
+  assert response.json == expected_response
diff --git a/tests/wsgi_app.py b/tests/wsgi_app.py
new file mode 100644
index 0000000..c91c247
--- /dev/null
+++ b/tests/wsgi_app.py
@@ -0,0 +1,12 @@
+import flask
+import os
+import vt
+
+app = flask.Flask(__name__)
+
+
+@app.get('/')
+def home():
+  with vt.Client(os.getenv('VT_APIKEY')) as c:
+    g = c.get('/domains/google.com')
+    return g.json()
diff --git a/vt/client.py b/vt/client.py
index 4fc7c5f..f5ed657 100644
--- a/vt/client.py
+++ b/vt/client.py
@@ -238,7 +238,17 @@ def __init__(
     if connector is not None:
       self._connector = connector
     else:
-      self._connector = aiohttp.TCPConnector(ssl=self._verify_ssl)
+      # the TCPConnector class expects to be instantiated inside a event loop.
+      # If there is none, create one.
+      try:
+        event_loop = asyncio.get_event_loop()
+      except RuntimeError:
+        event_loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(event_loop)
+
+      self._connector = aiohttp.TCPConnector(
+          ssl=self._verify_ssl, loop=event_loop
+      )
 
   def _full_url(self, path:str, *args: typing.Any) -> str:
     try: