diff --git a/piker/brokers/deribit/api.py b/piker/brokers/deribit/api.py
index 628a37f8e2..94d17ca086 100644
--- a/piker/brokers/deribit/api.py
+++ b/piker/brokers/deribit/api.py
@@ -154,19 +154,13 @@ def __init__(
         json_rpc: Callable,
         append_hooks: Callable,
         update_types: Callable,
+        key_id: str | None = None,
+        key_secret: str | None = None
     ) -> None:
 
         self._pairs: dict[str, Any] = None
-
-        config = get_config().get('deribit', {})
-
-        if ('key_id' in config) and ('key_secret' in config):
-            self._key_id = config['key_id']
-            self._key_secret = config['key_secret']
-
-        else:
-            self._key_id = None
-            self._key_secret = None
+        self._key_id = key_id
+        self._key_secret = key_secret
 
         self.json_rpc = json_rpc
         self.append_hooks = append_hooks
@@ -383,14 +377,24 @@ async def get_client(
     is_brokercheck: bool = False
 ) -> Client:
 
+    config = get_config().get('deribit', {})
+
+    ws_url = config.get('ws_url', _ws_url)
+    key_id = config.get('key_id', None)
+    key_secret = config.get('key_secret', None)
+
     async with (
         trio.open_nursery() as n,
         open_jsonrpc_session(
-            _ws_url,
+            ws_url,
             response_type=JSONRPCResult
         ) as control_functions
     ):
-        client = Client(*control_functions)
+        client = Client(
+            *control_functions,
+            key_id=key_id,
+            key_secret=key_secret
+        )
 
         _refresh_token: Optional[str] = None
         _access_token: Optional[str] = None
@@ -581,6 +585,9 @@ async def sub_hook(msg):
         client.append_hooks({
             'request': [sub_hook]
         })
+        client.update_types({
+            'request': JSONRPCSubRequest
+        })
 
         resp = await client.json_rpc(
             'private/subscribe', {'channels': channels})
diff --git a/tests/test_deribit.py b/tests/test_deribit.py
new file mode 100644
index 0000000000..5bb3336721
--- /dev/null
+++ b/tests/test_deribit.py
@@ -0,0 +1,46 @@
+import trio
+import pytest
+import tractor
+
+from piker import config
+
+from piker.brokers.deribit import api as deribit
+from piker.brokers.deribit.api import _testnet_ws_url
+
+from piker._cacheables import open_cached_client
+
+
+TESTNET_KEY_ID: str | None = None
+TESTNET_KEY_SECRET: str | None = None
+
+@pytest.mark.skipif(
+    not TESTNET_KEY_ID or not TESTNET_KEY_SECRET,
+    reason='configure a deribit testnet key pair before running this test'
+)
+def test_deribit_get_ticker(open_test_pikerd):
+
+    async def _test_main():
+        async with open_test_pikerd() as (_, _, _, _):
+            async with open_cached_client('deribit') as client:
+
+                symbols = await client.symbol_info()
+
+                syms = list(symbols.keys())
+                sym = syms[int(len(syms) / 2)]
+
+                async with deribit.maybe_open_ticker_feed(sym) as tick_stream:
+                    async for typ, msg in tick_stream:
+                        assert typ == 'ticker'
+                        assert 'open_interest' in msg['data']
+                        break
+
+
+
+    config.write({
+        'deribit': {
+            'ws_url': _testnet_ws_url,
+            'key_id': TESTNET_KEY_ID,
+            'key_secret': TESTNET_KEY_SECRET
+        }
+    })
+    trio.run(_test_main)