diff --git a/src/dir/bad.cc b/src/dir/bad.cc
new file mode 100644
index 0000000..2508a76
--- /dev/null
+++ b/src/dir/bad.cc
@@ -0,0 +1,7 @@
+// This code is bad!
+
+using Make_Unique = std::make_unique; // OK
+
+std::unique_ptr<int> add(int a, int b) {
+  return Make_Unique<int>(a + b); // OK. Fixed now!
+}
diff --git a/src/important.cc b/src/important.cc
new file mode 100644
index 0000000..dc06702
--- /dev/null
+++ b/src/important.cc
@@ -0,0 +1,5 @@
+// Here we care if we find prohibited regexes.
+
+std::unique_ptr<int> add(int a, int b) {
+  return std::make_unique<int>(a + b);
+}