diff --git a/tests/visual_tests/images/tiff-opaque-edge-gdal-256-reference.png b/tests/visual_tests/images/tiff-opaque-edge-gdal-256-reference.png
new file mode 100644
index 000000000..cb90dea1d
Binary files /dev/null and b/tests/visual_tests/images/tiff-opaque-edge-gdal-256-reference.png differ
diff --git a/tests/visual_tests/images/tiff-opaque-edge-gdal-600-reference.png b/tests/visual_tests/images/tiff-opaque-edge-gdal-600-reference.png
deleted file mode 100644
index ce3263490..000000000
Binary files a/tests/visual_tests/images/tiff-opaque-edge-gdal-600-reference.png and /dev/null differ
diff --git a/tests/visual_tests/images/tiff-opaque-edge-raster-256-reference.png b/tests/visual_tests/images/tiff-opaque-edge-raster-256-reference.png
index ce3263490..cb90dea1d 100644
Binary files a/tests/visual_tests/images/tiff-opaque-edge-raster-256-reference.png and b/tests/visual_tests/images/tiff-opaque-edge-raster-256-reference.png differ
diff --git a/tests/visual_tests/test.py b/tests/visual_tests/test.py
index 0958b552c..5fbe4be36 100755
--- a/tests/visual_tests/test.py
+++ b/tests/visual_tests/test.py
@@ -52,7 +52,7 @@ files = [
     {'name': "tiff-alpha-gradient-gdal", 'sizes':[(600,400)]},
     {'name': "tiff-nodata-edge-gdal", 'sizes':[(600,400)]},
     {'name': "tiff-nodata-edge-raster", 'sizes':[(600,400)]},
-    {'name': "tiff-opaque-edge-gdal", 'sizes':[(600,400)]},
+    {'name': "tiff-opaque-edge-gdal", 'sizes':[(256,256)]},
     {'name': "tiff-opaque-edge-raster", 'sizes':[(256,256)]},
     
     ]