diff --git a/examples/modular/launch.py b/examples/modular/launch.py
index 57d3b7af..d6348966 100644
--- a/examples/modular/launch.py
+++ b/examples/modular/launch.py
@@ -55,9 +55,10 @@
 
 # Setup for command line arguments
 parser = argparse.ArgumentParser(description='Run a GDM-Concordia simulation.')
-parser.add_argument(
-    '--agent', action='store', default='basic_agent', dest='agent_name'
-)
+parser.add_argument('--agent',
+                    action='store',
+                    default='basic_agent',
+                    dest='agent_name')
 parser.add_argument('--environment',
                     action='store',
                     default='reality_show',
diff --git a/examples/modular/launch_resident_visitor.py b/examples/modular/launch_resident_visitor.py
index 0ce44d11..9d123a05 100644
--- a/examples/modular/launch_resident_visitor.py
+++ b/examples/modular/launch_resident_visitor.py
@@ -55,15 +55,13 @@
 
 # Setup for command line arguments
 parser = argparse.ArgumentParser(description='Run a GDM-Concordia simulation.')
-parser.add_argument(
-    '--agent_resident',
-    action='store',
-    default='basic_agent',
-    dest='resident_agent_name',
-)
+parser.add_argument('--agent_resident',
+                    action='store',
+                    default='basic_agent',
+                    dest='resident_agent_name')
 parser.add_argument('--agent_visitor',
                     action='store',
-                    default='rational_agent__main_role',
+                    default='rational_agent',
                     dest='visitor_agent_name')
 parser.add_argument('--environment',
                     action='store',