diff --git a/beets/util/artresizer.py b/beets/util/artresizer.py
index 6fcd5f9b89..88d69696c0 100644
--- a/beets/util/artresizer.py
+++ b/beets/util/artresizer.py
@@ -528,7 +528,7 @@ def convert(self, source, **kwargs):
         if not self.local:
             # FIXME: Should probably issue a warning?
             return source
-        
+
         params = {}
 
         if "new_format" in kwargs:
@@ -541,7 +541,7 @@ def convert(self, source, **kwargs):
             fname, ext = os.path.splitext(source)
 
             target = fname + b"." + new_format.encode("utf8")
-            params['target'] = target
+            params["target"] = target
 
         if "maxwidth" in kwargs and kwargs["maxwidth"] > 0:
             params["maxwidth"] = kwargs["maxwidth"]
diff --git a/beetsplug/fetchart.py b/beetsplug/fetchart.py
index ceb5095c08..ed741f4846 100644
--- a/beetsplug/fetchart.py
+++ b/beetsplug/fetchart.py
@@ -178,7 +178,7 @@ def convert(self, plugin):
             self._log.debug(
                 "image needs rescaling ({} > {})", self.size[0], plugin.maxwidth
             )
-            convert_params['maxwidth'] = plugin.maxwidth
+            convert_params["maxwidth"] = plugin.maxwidth
 
         filesize = os.stat(syspath(self.path)).st_size
         if self.should_downsize(plugin, filesize):
@@ -187,7 +187,7 @@ def convert(self, plugin):
                 filesize,
                 plugin.max_filesize,
             )
-            convert_params['max_filesize'] = plugin.max_filesize
+            convert_params["max_filesize"] = plugin.max_filesize
 
         fmt = ArtResizer.shared.get_format(self.path)
         if self.should_reformat(plugin, fmt):
@@ -196,11 +196,11 @@ def convert(self, plugin):
                 fmt,
                 plugin.cover_format,
             )
-            convert_params['new_format'] = plugin.cover_format
+            convert_params["new_format"] = plugin.cover_format
 
         if self.should_deinterlace(plugin):
             self._log.debug("image needs deinterlacing")
-            convert_params['deinterlace'] = plugin.deinterlace
+            convert_params["deinterlace"] = plugin.deinterlace
 
         if convert_params:
             self.path = ArtResizer.shared.convert(self.path, **convert_params)
diff --git a/test/test_art_resize.py b/test/test_art_resize.py
index 9e919a4ae3..9c699e22b6 100644
--- a/test/test_art_resize.py
+++ b/test/test_art_resize.py
@@ -104,35 +104,50 @@ def _test_img_resize(self, backend):
             < os.stat(syspath(im_75_qual)).st_size
         )
 
-    def _test_img_reformat(self, backend): 
+    def _test_img_reformat(self, backend):
         fname, ext = os.path.splitext(self.IMG_225x225)
-        target_jpg = fname + b"." + "png".encode("utf8")
+        target_png = fname + b"." + "png".encode("utf8")
         # check reformat converts jpg to png
         im_png = backend.convert(
             self.IMG_225x225,
-            target=target_jpg,
+            target=target_png,
         )
-        self.assertEqual(b"PNG", backend.get_format(im_png))
+        assert backend.get_format(im_png) == b"PNG"
 
         # check reformat converts png to jpg with deinterlaced and maxwidth option
         fname, ext = os.path.splitext(self.IMG_225x225_PNG)
-        target_png = fname + b"." + "jpg".encode("utf8")
+        target_jpg = fname + b"." + "jpg".encode("utf8")
         im_jpg_deinterlaced = backend.convert(
             self.IMG_225x225_PNG,
             maxwidth=225,
-            target=target_png
+            target=target_jpg,
+            deinterlaced=True,
         )
 
-        self.assertEqual(b"JPEG", backend.get_format(im_jpg_deinterlaced))
+        assert backend.get_format(im_jpg_deinterlaced) == b"JPEG"
         self._test_img_deinterlaced(backend, im_jpg_deinterlaced)
 
+        # check reformat actually also resizes if maxwidth is also passed in
+        im_png_deinterlaced_smaller = backend.convert(
+            self.IMG_225x225_PNG,
+            maxwidth=100,
+            deinterlaced=True,
+        )
+
+        assert backend.get_format(im_png_deinterlaced_smaller) == b"PNG"
+        assert (
+            os.stat(syspath(im_png_deinterlaced_smaller)).st_size
+            < os.stat(syspath(self.IMG_225x225_PNG)).st_size
+        )
+        self._test_img_deinterlaced(backend, im_png_deinterlaced_smaller)
+
     def _test_img_deinterlaced(self, backend, path):
-        if backend.NAME == 'PIL':
+        if backend.NAME == "PIL":
             from PIL import Image
 
             with Image.open(path) as img:
                 assert "progression" not in img.info
-        elif backend.NAME == 'IMImageMagick':
+        elif backend.NAME == "IMImageMagick":
             cmd = backend.identify_cmd + [
                 "-format",
                 "%[interlace]",