diff --git a/deltachat-rpc-client/pyproject.toml b/deltachat-rpc-client/pyproject.toml
index 238fb5945a..596e8703f5 100644
--- a/deltachat-rpc-client/pyproject.toml
+++ b/deltachat-rpc-client/pyproject.toml
@@ -37,7 +37,7 @@ deltachat_rpc_client = [
 line-length = 120
 
 [tool.ruff]
-select = [
+lint.select = [
   "E", "W", # pycodestyle
   "F", # Pyflakes
   "N", # pep8-naming
diff --git a/python/pyproject.toml b/python/pyproject.toml
index 75469b4a62..1504acddd6 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -46,7 +46,7 @@ deltachat = [
 line-length = 120
 
 [tool.ruff]
-select = ["E", "F", "W", "YTT", "C4", "ISC", "ICN", "TID", "DTZ", "PLC", "PLE", "PLW", "PIE", "COM", "UP004", "UP010", "UP031", "UP032", "ANN204"]
+lint.select = ["E", "F", "W", "YTT", "C4", "ISC", "ICN", "TID", "DTZ", "PLC", "PLE", "PLW", "PIE", "COM", "UP004", "UP010", "UP031", "UP032", "ANN204"]
 line-length = 120
 
 [tool.isort]
diff --git a/python/tests/stress_test_db.py b/python/tests/stress_test_db.py
index 9a793a8167..d858a22748 100644
--- a/python/tests/stress_test_db.py
+++ b/python/tests/stress_test_db.py
@@ -18,14 +18,14 @@ def log(string):
 
     # make a number of accounts
     accounts = acfactory.get_many_online_accounts(3)
-    log("created %s accounts" % len(accounts))
+    log(f"created {len(accounts)} accounts")
 
     # put a bigfile into each account
     for acc in accounts:
         acc.bigfile = os.path.join(acc.get_blobdir(), "bigfile")
         with open(acc.bigfile, "wb") as f:
             f.write(b"01234567890" * 1000_000)
-    log("created %s bigfiles" % len(accounts))
+    log(f"created {len(accounts)} bigfiles")
 
     contact_addrs = [acc.get_self_contact().addr for acc in accounts]
     chat = accounts[0].create_group_chat("stress-group")