diff --git a/.gitignore b/.gitignore
index 575a800..c571f48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,7 +8,7 @@ MANIFEST
 build
 dist
 /tests/media/*
-!/tests/media/lenna.png
+!/tests/media/reference.png
 /venv
 /venv3
 /.env
diff --git a/tests/assets/Lenna.png b/tests/assets/Lenna.png
deleted file mode 100644
index 59ef68a..0000000
Binary files a/tests/assets/Lenna.png and /dev/null differ
diff --git a/tests/assets/lenna-800x600-white-border.jpg b/tests/assets/lenna-800x600-white-border.jpg
deleted file mode 100644
index d0b1183..0000000
Binary files a/tests/assets/lenna-800x600-white-border.jpg and /dev/null differ
diff --git a/tests/assets/lenna-800x600.jpg b/tests/assets/lenna-800x600.jpg
deleted file mode 100644
index 7c2ccd8..0000000
Binary files a/tests/assets/lenna-800x600.jpg and /dev/null differ
diff --git a/tests/media/lenna.png b/tests/media/lenna.png
deleted file mode 100644
index 59ef68a..0000000
Binary files a/tests/media/lenna.png and /dev/null differ
diff --git a/tests/media/reference.png b/tests/media/reference.png
new file mode 100644
index 0000000..385716c
Binary files /dev/null and b/tests/media/reference.png differ
diff --git a/tests/utils.py b/tests/utils.py
index b6c4952..bcf0dbd 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -17,9 +17,10 @@ def get_image_file():
 
     http://en.wikipedia.org/wiki/Lenna
     http://sipi.usc.edu/database/database.php?volume=misc&image=12
-
+    https://lintian.debian.org/tags/license-problem-non-free-img-lenna.html
+    https://github.com/libav/libav/commit/8895bf7b78650c0c21c88cec0484e138ec511a4b
     """
-    path = os.path.join(settings.MEDIA_ROOT, 'lenna.png')
+    path = os.path.join(settings.MEDIA_ROOT, 'reference.png')
     return open(path, 'r+b')