diff --git a/contrib/seeds/generate-seeds.py b/contrib/seeds/generate-seeds.py
--- a/contrib/seeds/generate-seeds.py
+++ b/contrib/seeds/generate-seeds.py
@@ -119,7 +119,10 @@
 
 def main():
     if len(sys.argv) < 2:
-        print('Usage: {} <path_to_nodes_txt>'.format(sys.argv[0]), file=sys.stderr)
+        print(
+            'Usage: {} <path_to_nodes_txt>'.format(
+                sys.argv[0]),
+            file=sys.stderr)
         sys.exit(1)
     g = sys.stdout
     indir = sys.argv[1]
diff --git a/test/functional/test_framework/script.py b/test/functional/test_framework/script.py
--- a/test/functional/test_framework/script.py
+++ b/test/functional/test_framework/script.py
@@ -532,7 +532,7 @@
                 # Check for truncation
                 if len(data) < datasize:
                     raise CScriptTruncatedPushDataError(
-                        '{}: truncated data'.format(pushdata_type, data))
+                        '{}: truncated data'.format(pushdata_type), data)
 
                 i += datasize