diff --git a/tools/python/run_adb.py b/tools/python/run_adb.py
index 500c0a9b553ec..4455246a25186 100755
--- a/tools/python/run_adb.py
+++ b/tools/python/run_adb.py
@@ -22,7 +22,7 @@ def run_adb(android_sdk_root: str, args: typing.List[str]):
 def is_emulator_running(adb_path) -> bool:
     result = run(adb_path, "devices", capture_stdout=True)
     output = result.stdout
-    output_str = output.decode('utf-8').strip()
+    output_str = output.decode("utf-8").strip()
     lines = output_str.splitlines()
     if len(lines) > 1:
         for line in lines[1:]: