diff --git a/src/calibre/utils/img.py b/src/calibre/utils/img.py
index b61627b63e..ff51c76e75 100644
--- a/src/calibre/utils/img.py
+++ b/src/calibre/utils/img.py
@@ -129,8 +129,6 @@ def image_from_data(data):
     i = QImage()
     if not i.loadFromData(data):
         q = what(None, data)
-        if q == 'jxr':
-            return load_jxr_data(data)
         raise NotImage(f'Not a valid image (detected type: {q})')
     return i
 
@@ -693,13 +691,6 @@ def test():  # {{{
     despeckle_image(img)
     remove_borders_from_image(img)
     image_to_data(img, fmt='GIF')
-    p = subprocess.Popen([get_exe_path('JxrDecApp'), '-h'],
-                           creationflags=subprocess.DETACHED_PROCESS if iswindows else 0,
-                           stdout=subprocess.PIPE)
-    raw, _ = p.communicate()
-    p.wait()
-    if b'JPEG XR Decoder Utility' not in raw:
-        raise SystemExit('Failed to run JxrDecApp')
 # }}}