diff --git a/tests/plantcv/visualize/test_tile.py b/tests/plantcv/visualize/test_tile.py
index f1c719212..5f88c9fcf 100644
--- a/tests/plantcv/visualize/test_tile.py
+++ b/tests/plantcv/visualize/test_tile.py
@@ -5,12 +5,12 @@
 
 def test_tile(visualize_test_data):
     """Test for PlantCV."""
-    pcv.params.debug = "plot"
     # Read in image list
     images = []
-    for i in os.listdir(visualize_test_data.tile_dir):
-        images.append(pcv.readimage(visualize_test_data.tile_dir+i)[0])
-    images.sort
+    paths = [visualize_test_data.tile_dir+i for i in visualize_test_data.tile_dir]
+    paths.sort
+    for i in paths:
+        images.append(pcv.readimage(i)[0])
     composite = tile(images=images, nrow=2, ncol=3)
     query_img, _, _ = pcv.readimage(visualize_test_data.tile_out)
     assert (composite == query_img).all()
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