diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 875837d10321..a278b2ecbfb7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -15016,16 +15016,16 @@ in {
   };
 
   mutagen = buildPythonPackage (rec {
-    name = "mutagen-1.34";
+    name = "mutagen-1.36";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/m/mutagen/${name}.tar.gz";
-      sha256 = "06anfzpjajwwh25n3afavwafrix3abahgwfr2zinrhqh2w98kw5s";
+      sha256 = "1kabb9b81hgvpd3wcznww549vss12b1xlvpnxg1r6n4c7gikgvnp";
     };
 
     # Needed for tests only
-    buildInputs = [ pkgs.faad2 pkgs.flac pkgs.vorbis-tools pkgs.liboggz
-      pkgs.glibcLocales
+    buildInputs = with self; [ pkgs.faad2 pkgs.flac pkgs.vorbis-tools pkgs.liboggz
+      pkgs.glibcLocales pytest
     ];
     LC_ALL = "en_US.UTF-8";