diff --git a/beets/util/__init__.py b/beets/util/__init__.py
index 411202075..a0053c260 100644
--- a/beets/util/__init__.py
+++ b/beets/util/__init__.py
@@ -1133,7 +1133,10 @@ def get_temp_filename(
     tempdir = get_module_tempdir(module)
     tempdir.mkdir(parents=True, exist_ok=True)
 
-    _, filename = tempfile.mkstemp(dir=tempdir, prefix=prefix, suffix=suffix)
+    descriptor, filename = tempfile.mkstemp(
+        dir=tempdir, prefix=prefix, suffix=suffix
+    )
+    os.close(descriptor)
     return bytestring_path(filename)
 
 
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 33a4710e6..be753c262 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -22,6 +22,9 @@ New features:
 
 Bug fixes:
 
+* :doc:`plugins/fetchart`: Fix fetchart bug where a tempfile could not be deleted due to never being
+  properly closed.
+  :bug:`5521`
 * :doc:`plugins/lyrics`: LRCLib will fallback to plain lyrics if synced lyrics
   are not found and `synced` flag is set to `yes`.
 * Synchronise files included in the source distribution with what we used to