diff --git a/litecord/embed/sanitizer.py b/litecord/embed/sanitizer.py
index 4bfe783..027e4ea 100644
--- a/litecord/embed/sanitizer.py
+++ b/litecord/embed/sanitizer.py
@@ -22,7 +22,6 @@ litecord.embed.sanitizer
     sanitize embeds by giving common values
     such as type: rich
 """
-import urllib.parse
 from typing import Dict, Any, Optional, Union, List, Tuple
 
 from logbook import Logger
diff --git a/tests/test_websocket.py b/tests/test_websocket.py
index 50216b5..65bd51f 100644
--- a/tests/test_websocket.py
+++ b/tests/test_websocket.py
@@ -17,12 +17,14 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
 
+import json
+
 import pytest
 import websockets
-import json
 
 from tests.common import login
 from litecord.gateway.opcodes import OP
+from litecord.gateway.websocket import decode_etf
 
 
 async def _json(conn):
@@ -30,6 +32,11 @@ async def _json(conn):
     return json.loads(frame)
 
 
+async def _etf(conn):
+    frame = await conn.recv()
+    return decode_etf(frame)
+
+
 async def _json_send(conn, data):
     frame = json.dumps(data)
     await conn.send(frame)
@@ -53,9 +60,13 @@ async def get_gw(test_cli) -> str:
     return gw_json['url']
 
 
-async def gw_start(test_cli):
+async def gw_start(test_cli, *, etf=False):
     """Start a websocket connection"""
     gw_url = await get_gw(test_cli)
+
+    if etf:
+        gw_url = f'{gw_url}?encoding=etf'
+
     return await websockets.connect(gw_url)
 
 
@@ -164,3 +175,15 @@ async def test_heartbeat(test_cli):
     assert recv['op'] == OP.HEARTBEAT_ACK
 
     await _close(conn)
+
+
+@pytest.mark.asyncio
+async def test_etf(test_cli):
+    """Test if the websocket can send a HELLO message over ETF."""
+    conn = await gw_start(test_cli, etf=True)
+
+    try:
+        hello = await _etf(conn)
+        assert hello['op'] == OP.HELLO
+    finally:
+        await _close(conn)