diff --git a/examples/t11_groot_howto.cpp b/examples/t11_groot_howto.cpp
index da974947c..14713cbac 100644
--- a/examples/t11_groot_howto.cpp
+++ b/examples/t11_groot_howto.cpp
@@ -120,7 +120,7 @@ int main()
   // Both formats are compatible with Groot2
 
   // Logging with lightweight serialization
-  BT::FileLogger2 logger2(tree, "t12_logger2.btlog");
+  BT::FileLogger2 logger2(tree, "t11_groot_howto.btlog");
   BT::MinitraceLogger minilog(tree, "minitrace.json");
 
   while(1)
diff --git a/include/behaviortree_cpp/bt_factory.h b/include/behaviortree_cpp/bt_factory.h
index ed0cdac76..0b00c7164 100644
--- a/include/behaviortree_cpp/bt_factory.h
+++ b/include/behaviortree_cpp/bt_factory.h
@@ -118,10 +118,14 @@ class Tree
 
   [[nodiscard]] TreeNode* rootNode() const;
 
-  /// Sleep for a certain amount of time.
-  /// This sleep could be interrupted by the method
-  /// TreeNode::emitWakeUpSignal()
-  void sleep(std::chrono::system_clock::duration timeout);
+  /**
+    * @brief Sleep for a certain amount of time. This sleep could be interrupted by the method TreeNode::emitWakeUpSignal()
+    *
+    * @param timeout  duration of the sleep
+    * @return         true if the timeout was NOT reached and the signal was received.
+    *
+    * */
+  bool sleep(std::chrono::system_clock::duration timeout);
 
   ~Tree();
 
diff --git a/src/bt_factory.cpp b/src/bt_factory.cpp
index 2533b6033..87bdd1916 100644
--- a/src/bt_factory.cpp
+++ b/src/bt_factory.cpp
@@ -633,9 +633,10 @@ TreeNode* Tree::rootNode() const
   return subtree_nodes.empty() ? nullptr : subtree_nodes.front().get();
 }
 
-void Tree::sleep(std::chrono::system_clock::duration timeout)
+bool Tree::sleep(std::chrono::system_clock::duration timeout)
 {
-  wake_up_->waitFor(std::chrono::duration_cast<std::chrono::milliseconds>(timeout));
+  return wake_up_->waitFor(
+      std::chrono::duration_cast<std::chrono::milliseconds>(timeout));
 }
 
 Tree::~Tree()