diff --git a/glean_parser/go_server.py b/glean_parser/go_server.py
index 403a0d71..03abb728 100644
--- a/glean_parser/go_server.py
+++ b/glean_parser/go_server.py
@@ -21,6 +21,7 @@ The generated code creates the following:
 * Two methods for logging an Event metric
     one with and one without user request info specified
 """
+
 from collections import defaultdict
 from pathlib import Path
 from typing import Any, Dict, Optional, List
diff --git a/glean_parser/javascript_server.py b/glean_parser/javascript_server.py
index cdaa0cb4..f5099d26 100644
--- a/glean_parser/javascript_server.py
+++ b/glean_parser/javascript_server.py
@@ -28,6 +28,7 @@ There are two patterns for event structure supported in this environment:
 
 Therefore, unlike in other outputters, here we don't generate classes for each metric.
 """
+
 from collections import defaultdict
 from pathlib import Path
 from typing import Any, Dict, Optional, List
diff --git a/glean_parser/python_server.py b/glean_parser/python_server.py
index 8ead0eb3..db9d39f5 100644
--- a/glean_parser/python_server.py
+++ b/glean_parser/python_server.py
@@ -20,6 +20,7 @@ see `SUPPORTED_METRIC_TYPES` below.
 The generated code creates a `ServerEventLogger` class for each ping that has
 at least one event metric. The class has a `record` method for each event metric.
 """
+
 from collections import defaultdict
 from pathlib import Path
 from typing import Any, Dict, Optional, List
diff --git a/glean_parser/ruby_server.py b/glean_parser/ruby_server.py
index bbca3df8..21c21544 100644
--- a/glean_parser/ruby_server.py
+++ b/glean_parser/ruby_server.py
@@ -18,6 +18,7 @@ Then it's the role of the ingestion pipeline to pick the messages up and process
 Warning: this outputter supports a limited set of metrics,
 see `SUPPORTED_METRIC_TYPES` below.
 """
+
 from collections import defaultdict
 from pathlib import Path
 from typing import Any, Dict, List, Optional
diff --git a/tools/extract_data_categories.py b/tools/extract_data_categories.py
index 855a44f3..34f88c70 100755
--- a/tools/extract_data_categories.py
+++ b/tools/extract_data_categories.py
@@ -129,7 +129,7 @@ def update_lines(
 
     for line in lines_iter:
         output.append(line)
-        if line.startswith(f"    data_reviews:"):
+        if line.startswith("    data_reviews:"):
             break
 
     for line in lines_iter: