diff --git a/test_runner/regress/test_tenant_detach.py b/test_runner/regress/test_tenant_detach.py
index 9a0f7f7313..bafddc7721 100644
--- a/test_runner/regress/test_tenant_detach.py
+++ b/test_runner/regress/test_tenant_detach.py
@@ -120,8 +120,6 @@ def test_detach_while_attaching(
     tenant_id = TenantId(pg.safe_psql("show neon.tenant_id")[0][0])
     timeline_id = TimelineId(pg.safe_psql("show neon.timeline_id")[0][0])
 
-    checkpoint_numbers = range(1, 3)
-
     # Create table, and insert some rows. Make it big enough that it doesn't fit in
     # shared_buffers, otherwise the SELECT after restart will just return answer
     # from shared_buffers without hitting the page server, which defeats the point
@@ -143,11 +141,11 @@ def test_detach_while_attaching(
     # run checkpoint manually to be sure that data landed in remote storage
     pageserver_http.timeline_checkpoint(tenant_id, timeline_id)
 
-    log.info(f"waiting for upload")
+    log.info("waiting for upload")
 
     # wait until pageserver successfully uploaded a checkpoint to remote storage
     wait_for_upload(client, tenant_id, timeline_id, current_lsn)
-    log.info(f"upload is done")
+    log.info("upload is done")
 
     # Detach it
     pageserver_http.tenant_detach(tenant_id)
@@ -166,6 +164,6 @@ def test_detach_while_attaching(
     # Attach it again. If the GC and compaction loops from the previous attach/detach
     # cycle are still running, things could get really confusing..
     pageserver_http.tenant_attach(tenant_id)
-    
+
     with pg.cursor() as cur:
-        cur.execute("SELECT COUNT(*) FROM foo");
+        cur.execute("SELECT COUNT(*) FROM foo")
diff --git a/test_runner/regress/test_tenants.py b/test_runner/regress/test_tenants.py
index f6d0b5f31f..0b20afefc3 100644
--- a/test_runner/regress/test_tenants.py
+++ b/test_runner/regress/test_tenants.py
@@ -259,4 +259,6 @@ def test_pageserver_with_empty_tenants(
     ), f"Tenant {tenant_without_timelines_dir} without timelines dir should be broken"
 
     [loaded_tenant] = [t for t in tenants if t["id"] == str(tenant_with_empty_timelines_dir)]
-    assert loaded_tenant["state"] == "Active", "Tenant {tenant_with_empty_timelines_dir} with empty timelines dir should be active and ready for timeline creation"
+    assert (
+        loaded_tenant["state"] == "Active"
+    ), "Tenant {tenant_with_empty_timelines_dir} with empty timelines dir should be active and ready for timeline creation"