diff --git a/Tests/test_map.py b/Tests/test_map.py
index 752c5f268..42f3447eb 100644
--- a/Tests/test_map.py
+++ b/Tests/test_map.py
@@ -24,11 +24,17 @@ def test_overflow():
 
 
 def test_tobytes():
+    # Note that this image triggers the decompression bomb warning:
+    max_pixels = Image.MAX_IMAGE_PIXELS
+    Image.MAX_IMAGE_PIXELS = None
+
     # Previously raised an access violation on Windows
     with Image.open("Tests/images/l2rgb_read.bmp") as im:
         with pytest.raises((ValueError, MemoryError, OSError)):
             im.tobytes()
 
+    Image.MAX_IMAGE_PIXELS = max_pixels
+
 
 @pytest.mark.skipif(sys.maxsize <= 2 ** 32, reason="Requires 64-bit system")
 def test_ysize():