diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca8e71cded7b9f795cf96ab4f13d3e5e83e0412b..aafba15a905c3c775ce5a64f94413b101de2f3d6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,6 +72,7 @@ add_service_files(
   TSTExecutorGetConstraints.srv
   TSTExecutorRequestPause.srv
   TSTPauseExecutor.srv
+  TSTRegisterExecutingTree.srv
   TSTStartExecutor.srv
 )
 
diff --git a/srv/TSTRegisterExecutingTree.srv b/srv/TSTRegisterExecutingTree.srv
new file mode 100644
index 0000000000000000000000000000000000000000..bf7cbbfa97290acc51dedade0319c0c48db6b330
--- /dev/null
+++ b/srv/TSTRegisterExecutingTree.srv
@@ -0,0 +1,10 @@
+#
+# Register a tree as executing in the exec manager.
+#
+
+string global_tree_uuid
+string parent_global_tree_uuid
+---
+bool success
+int32 error
+string reason