diff --git a/piker/clearing/_client.py b/piker/clearing/_client.py
index 08b0f4c8..0a40b548 100644
--- a/piker/clearing/_client.py
+++ b/piker/clearing/_client.py
@@ -235,7 +235,8 @@ async def open_ems(
             not getattr(mod, 'trades_dialogue', None)
             or mode == 'paper'
         ):
-            mode = 'paper'        
+            mode = 'paper'
+
         from ._ems import _emsd_main
         async with (
             # connect to emsd
@@ -254,6 +255,7 @@ async def open_ems(
                     dialogs,
                 )
             ),
+
             # open 2-way trade command stream
             ctx.open_stream() as trades_stream,
         ):
@@ -263,7 +265,8 @@ async def open_ems(
                     relay_order_cmds_from_sync_code,
                     fqsn,
                     trades_stream
-                ) 
+                )
+
                 yield (
                     book,
                     trades_stream,
diff --git a/piker/config.py b/piker/config.py
index f7b1e588..abcbb652 100644
--- a/piker/config.py
+++ b/piker/config.py
@@ -76,7 +76,7 @@ def get_app_dir(app_name, roaming=True, force_posix=False):
     # TODO: This is a hacky way to a) determine we're testing
     # and b) creating a test dir. We should aim to set a variable
     # within the tractor runtimes and store testing config data
-    # outside of the users filesystem 
+    # outside of the users filesystem
     if "pytest" in sys.modules:
         app_name = os.path.join(app_name, TEST_CONFIG_DIR_PATH)
 
diff --git a/tests/test_paper.py b/tests/test_paper.py
index 0d208ce0..f6183497 100644
--- a/tests/test_paper.py
+++ b/tests/test_paper.py
@@ -126,6 +126,7 @@ def test_paper_trade(open_test_pikerd: AsyncContextManager, delete_testing_dir):
                         except (NameError, AttributeError):
                             pass
                             # Do nothing, message isn't a position
+
             await trio.sleep(1)
             # Assert entries are made in both ledger and PPS
             if assert_entries or assert_pps or assert_zeroed_pps: