diff --git a/tests/draw/__init__.py b/tests/draw/__init__.py
index 8d758f7b3..ef325b880 100644
--- a/tests/draw/__init__.py
+++ b/tests/draw/__init__.py
@@ -82,7 +82,7 @@ def assert_different_renderings(name, *documents):
 
     for i, pixels_1 in enumerate(pixels_list, start=1):
         for j, pixels_2 in enumerate(pixels_list[i:], start=i+1):
-            if pixels_1 == pixels_2:  # pragma: no cover
+            if tuple(pixels_1) == tuple(pixels_2):  # pragma: no cover
                 name_1, name_2 = f'{name}_{i}', f'{name}_{j}'
                 write_png(name_1, pixels_1, width, height)
                 assert False, f'{name_1} and {name_2} are the same'
diff --git a/tests/draw/test_box.py b/tests/draw/test_box.py
index dc0703742..69104c640 100644
--- a/tests/draw/test_box.py
+++ b/tests/draw/test_box.py
@@ -51,7 +51,7 @@ def test_borders(assert_pixels, assert_different_renderings, margin='10px',
 
 
 @assert_no_logs
-def test_borders_table_collapse(assert_pixels, assert_different_renderings):
+def test_borders_table_collapse(assert_different_renderings):
     """Test the rendering of collapsing borders."""
     source = '''
       <style>
@@ -67,10 +67,29 @@ def test_borders_table_collapse(assert_pixels, assert_different_renderings):
         source % border_style
         for border_style in (
             'none', 'solid', 'dashed', 'dotted', 'double',
-            'inset', 'outset', 'groove', 'ridge'))
+            'inset', 'groove'))
     assert_different_renderings(*documents)
 
 
+@assert_no_logs
+@pytest.mark.parametrize('styles', (
+    ('groove', 'outset'),
+    ('ridge', 'inset'),
+))
+def test_borders_table_collapse_equivalent(assert_same_renderings, styles):
+    """Test the rendering of equivalent collapsing borders."""
+    source = '''
+      <style>
+        @page { size: 140px 110px }
+        table { width: 100px; height: 70px; margin: 10px;
+                border-collapse: collapse; border: 10px %s blue }
+      </style>
+      <table><td>abc</td>'''
+
+    documents = (source % border_style for border_style in styles)
+    assert_same_renderings(*documents)
+
+
 @assert_no_logs
 def test_outlines(assert_pixels, assert_different_renderings):
     return test_borders(