diff --git a/.github/workflows/ros-noetic-test.yaml b/.github/workflows/ros-noetic-test.yaml
index ea0de5d..a471f6a 100644
--- a/.github/workflows/ros-noetic-test.yaml
+++ b/.github/workflows/ros-noetic-test.yaml
@@ -3,8 +3,6 @@ name: ros-noetic
 
 on:
   workflow_dispatch:
-    branches:
-      - main
   pull_request:
     branches:
       - main
diff --git a/launch/simulation.launch b/launch/simulation.launch
index c513226..4470bca 100644
--- a/launch/simulation.launch
+++ b/launch/simulation.launch
@@ -4,7 +4,7 @@
   <arg name="gui" default="true" />
   <arg name="paused" default="false" />
   <arg name="headless" default="false" />
-  <arg name="world_path" default="$(optenv ROS_HOME ~/.ros)/virtual_maize_field/"/>
+  <arg name="world_path" default="$(eval optenv('ROS_HOME', env('HOME')+'/.ros')+'/virtual_maize_field/')" />
   <arg name="world_name" default="generated.world"/>
 
   <!-- Launch Gazebo with the specified world -->