1 files changed, 21 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/module_inception.rs b/src/tools/clippy/tests/ui/module_inception.rs
new file mode 100644
index 000000000..a23aba916
--- /dev/null
+++ b/src/tools/clippy/tests/ui/module_inception.rs
@@ -0,0 +1,21 @@
+#![warn(clippy::module_inception)]
+
+mod foo {
+    mod bar {
+        mod bar {
+            mod foo {}
+        }
+        mod foo {}
+    }
+    mod foo {
+        mod bar {}
+    }
+}
+
+// No warning. See <https://github.com/rust-lang/rust-clippy/issues/1220>.
+mod bar {
+    #[allow(clippy::module_inception)]
+    mod bar {}
+}
+
+fn main() {}