diff --git a/tests/test_box.py b/tests/test_box.py
index 21ba4fd0..9c6a6499 100644
--- a/tests/test_box.py
+++ b/tests/test_box.py
@@ -1,7 +1,19 @@
 import pytest
 
 from rich.console import ConsoleOptions, ConsoleDimensions
-from rich.box import ASCII, DOUBLE, ROUNDED, HEAVY, SQUARE
+from rich.box import (
+    ASCII,
+    DOUBLE,
+    ROUNDED,
+    HEAVY,
+    SQUARE,
+    MINIMAL_HEAVY_HEAD,
+    MINIMAL,
+    SIMPLE_HEAVY,
+    SIMPLE,
+    HEAVY_EDGE,
+    HEAVY_HEAD,
+)
 
 
 def test_str():
@@ -46,10 +58,29 @@ def test_box_substitute():
         encoding="utf-8",
         max_height=25,
     )
+
+    # A different Box due to legacy_windows
+    assert ROUNDED.substitute(options) == SQUARE
+    assert MINIMAL_HEAVY_HEAD.substitute(options) == MINIMAL
+    assert SIMPLE_HEAVY.substitute(options) == SIMPLE
     assert HEAVY.substitute(options) == SQUARE
+    assert HEAVY_EDGE.substitute(options) == SQUARE
+    assert HEAVY_HEAD.substitute(options) == SQUARE
 
+    # The same box
     options.legacy_windows = False
+    assert ROUNDED.substitute(options) == ROUNDED
+    assert MINIMAL_HEAVY_HEAD.substitute(options) == MINIMAL_HEAVY_HEAD
+    assert SIMPLE_HEAVY.substitute(options) == SIMPLE_HEAVY
     assert HEAVY.substitute(options) == HEAVY
+    assert HEAVY_EDGE.substitute(options) == HEAVY_EDGE
+    assert HEAVY_HEAD.substitute(options) == HEAVY_HEAD
 
+    # A different Box due to ascii encoding
     options.encoding = "ascii"
+    assert ROUNDED.substitute(options) == ASCII
+    assert MINIMAL_HEAVY_HEAD.substitute(options) == ASCII
+    assert SIMPLE_HEAVY.substitute(options) == ASCII
     assert HEAVY.substitute(options) == ASCII
+    assert HEAVY_EDGE.substitute(options) == ASCII
+    assert HEAVY_HEAD.substitute(options) == ASCII