diff --git a/esphome/platformio_runner.py b/esphome/platformio_runner.py
index 599c9408a4..5b14a72557 100644
--- a/esphome/platformio_runner.py
+++ b/esphome/platformio_runner.py
@@ -101,7 +101,7 @@ def patch_file_downloader() -> None:
     FileDownloader.__init__ = patched_init
 
 
-_IGNORE_LIB_WARNINGS = f"(?:{'|'.join(['Hash', 'Update'])})"
+_IGNORE_LIB_WARNINGS = "(?:Hash|Update)"
 # Regex patterns matched against each line of PlatformIO output. Lines that
 # match are dropped by RedirectText before they reach the parent process.
 # Patterns are anchored at the start of the line (RedirectText uses
diff --git a/pyproject.toml b/pyproject.toml
index dc6785001d..d16bf2b625 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -113,6 +113,7 @@ exclude = ['generated']
 select = [
   "E",    # pycodestyle
   "F",    # pyflakes/autoflake
+  "FLY",  # flynt: convert string formatting to f-strings
   "FURB", # refurb
   "I",    # isort
   "PERF", # performance