diff --git a/poincare/test/tree/blob_node.h b/poincare/test/tree/blob_node.h
index 5d81a0315..132d6dca1 100644
--- a/poincare/test/tree/blob_node.h
+++ b/poincare/test/tree/blob_node.h
@@ -23,7 +23,7 @@ public:
   int data() { return m_data; }
   void setData(int data) { m_data = data; }
   virtual int numberOfChildren() const override { return 0; }
-  #if POINCARE_TREE_LOG
+#if POINCARE_TREE_LOG
   virtual void logNodeName(std::ostream & stream) const override {
     stream << "Blob";
   }
diff --git a/poincare/test/tree/pair_node.h b/poincare/test/tree/pair_node.h
index 0fe15b034..51f652719 100644
--- a/poincare/test/tree/pair_node.h
+++ b/poincare/test/tree/pair_node.h
@@ -32,8 +32,8 @@ public:
 class PairByReference : public TreeByReference {
 public:
   PairByReference(TreeByReference t1, TreeByReference t2) : TreeByReference(TreePool::sharedPool()->createTreeNode<PairNode>()) {
-    replaceChildAtIndexInPlace(0, t1); // TODO: Is that the correct way to do this?
-    replaceChildAtIndexInPlace(1, t2); // TODO: Is that the correct way to do this?
+    replaceChildAtIndexInPlace(0, t1);
+    replaceChildAtIndexInPlace(1, t2);
   }
 };
 
diff --git a/poincare/test/tree/tree_by_value.cpp b/poincare/test/tree/tree_by_value.cpp
index bc17fe7fd..03b40a9bf 100644
--- a/poincare/test/tree/tree_by_value.cpp
+++ b/poincare/test/tree/tree_by_value.cpp
@@ -33,7 +33,7 @@ static void assert_pool_size(int i) {
 #endif
 }
 
-QUIZ_CASE(tree_by_values_are_stored_in_pool) {
+QUIZ_CASE(tree_by_values_are_discared_after_block) {
   assert_pool_size(0);
   {
     BlobByValue b(0);
@@ -42,6 +42,23 @@ QUIZ_CASE(tree_by_values_are_stored_in_pool) {
   assert_pool_size(0);
 }
 
+void make_temp_blob() {
+  BlobByValue b(5);
+}
+QUIZ_CASE(tree_by_values_are_discared_after_function_call) {
+  assert_pool_size(0);
+  make_temp_blob();
+  assert_pool_size(0);
+}
+
+QUIZ_CASE(tree_by_values_can_be_copied) {
+  assert_pool_size(0);
+  BlobByValue b(123);
+  assert_pool_size(1);
+  TreeByValue t = b;
+  assert_pool_size(2);
+}
+
 TreeByValue blob_with_data_3() {
   return BlobByValue(3);
 }