diff --git a/test/test_mediafile.py b/test/test_mediafile.py
index 805fd168c..cd149e7e4 100644
--- a/test/test_mediafile.py
+++ b/test/test_mediafile.py
@@ -53,16 +53,6 @@ class ArtTestMixin(object):
         return self._jpg_data
     _jpg_data = None
 
-    @property
-    def jpg_data_only_magic_bytes(self):
-        if not self._jpg_data:
-            with open(
-                    os.path.join(_common.RSRC, 'only-magic-bytes.jpg'),
-                    'rb') as f:
-                self._jpg_data = f.read()
-        return self._jpg_data
-    _jpg_data = None
-
     @property
     def tiff_data(self):
         if not self._jpg_data:
diff --git a/test/test_mediafile_edge.py b/test/test_mediafile_edge.py
index 3e828ac3e..c871e0a9d 100644
--- a/test/test_mediafile_edge.py
+++ b/test/test_mediafile_edge.py
@@ -78,6 +78,13 @@ class EdgeTest(unittest.TestCase):
         f = beets.mediafile.MediaFile(os.path.join(_common.RSRC, 'oldape.ape'))
         self.assertEqual(f.bitrate, 0)
 
+    def test_only_magic_bytes_jpeg(self):
+        f = open(os.path.join(_common.RSRC, 'only-magic-bytes.jpg'), 'rb')
+        jpg_data = f.read()
+        self.assertEqual(
+            beets.mediafile._image_mime_type(jpg_data),
+            'image/jpeg')
+
 
 class InvalidValueToleranceTest(unittest.TestCase):