From a4c309e655d5904884e54cfdc07569839d2d1664 Mon Sep 17 00:00:00 2001
From: Thomas A Caswell <tcaswell@gmail.com>
Date: Fri, 10 Mar 2017 16:11:54 -0500
Subject: [PATCH] TST: fail on missing baseline file

---
 lib/matplotlib/testing/decorators.py | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/lib/matplotlib/testing/decorators.py b/lib/matplotlib/testing/decorators.py
index a026eb8c02ea..f2e9340034ee 100644
--- a/lib/matplotlib/testing/decorators.py
+++ b/lib/matplotlib/testing/decorators.py
@@ -281,12 +281,7 @@ def copy_baseline(self, baseline, extension):
             reason = ("Do not have baseline image {0} because this "
                       "file does not exist: {1}".format(expected_fname,
                                                         orig_expected_fname))
-            if is_called_from_pytest():
-                import pytest
-                pytest.xfail(reason)
-            else:
-                from ._nose import knownfail
-                knownfail(reason)
+            raise ImageComparisonFailure(reason)
         return expected_fname
 
     def compare(self, idx, baseline, extension):