diff --git a/pycoast/tests/test_pycoast.py b/pycoast/tests/test_pycoast.py
index c8a1681..4d144bc 100644
--- a/pycoast/tests/test_pycoast.py
+++ b/pycoast/tests/test_pycoast.py
@@ -324,10 +324,7 @@ def _new_test_image(mode, shape, filename, color=0):
 
 def images_match(ref_image, test_image):
     """Check is images match."""
-    res = fft_metric(np.array(ref_image), np.array(test_image))
-    if not res:
-        test_image.save(ref_image.filename)
-    return res
+    return fft_metric(np.array(ref_image), np.array(test_image))
 
 
 class _ContourWriterTestBase: