diff --git a/README.md b/README.md
index 15465edfdfbd48dbe64b6458d657b4cc4ccf44f5..e3d757b4076a10bfd3c4b24ecb11bd649c6bc890 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,10 @@ the test suit with more tests of your own.
     right and to go straight.
   - `test_shortest_path.py`: Some unit tests for testing the `shortest_path`
     function (in `maze.py` for Part 4).
+  - `test_maze_reader.py`: Some initial unit tests for testing the
+    `maze_reader()` function (in `maze_runner.py` for Part 5).
+
+- Folder `mazes` contains some mazes of different sizes for manual testing.
 
 - More tests will be added as the coursework specification evolves.