diff --git a/docs/api/tuf.api.rst b/docs/api/tuf.api.rst
index d4309b843e..7d3126d23d 100644
--- a/docs/api/tuf.api.rst
+++ b/docs/api/tuf.api.rst
@@ -16,4 +16,5 @@ Metadata API
    tuf.api.serialization
 
 .. automodule:: tuf.api.metadata
-   :no-members:
\ No newline at end of file
+   :no-members:
+   :no-inherited-members:
diff --git a/docs/conf.py b/docs/conf.py
index cb146ed917..a5314127e8 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -66,5 +66,6 @@
 
 autodoc_default_options = {
     'members': True,
+    'inherited-members': 'Exception', # excl. members inherited from 'Exception'
     'exclude-members': 'to_dict, from_dict'
-}
\ No newline at end of file
+}
diff --git a/tests/test_api.py b/tests/test_api.py
index 6accd680bd..531d8f868c 100755
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -264,10 +264,6 @@ def test_metadata_base(self) -> None:
         md.signed.bump_version()
         self.assertEqual(md.signed.version, 2)
         self.assertEqual(md.signed.expires, datetime(2030, 1, 1, 0, 0))
-        md.signed.bump_expiration()
-        self.assertEqual(md.signed.expires, datetime(2030, 1, 2, 0, 0))
-        md.signed.bump_expiration(timedelta(days=365))
-        self.assertEqual(md.signed.expires, datetime(2031, 1, 2, 0, 0))
 
         # Test is_expired with reference_time provided
         is_expired = md.signed.is_expired(md.signed.expires)
@@ -329,7 +325,7 @@ def test_metadata_verify_delegate(self) -> None:
 
         # verify fails when delegate content is modified
         expires = snapshot.signed.expires
-        snapshot.signed.bump_expiration()
+        snapshot.signed.expires = expires + timedelta(days=1)
         with self.assertRaises(exceptions.UnsignedMetadataError):
             root.verify_delegate(Snapshot.type, snapshot)
         snapshot.signed.expires = expires
diff --git a/tuf/api/metadata.py b/tuf/api/metadata.py
index f4bff9537b..68b6d4bebf 100644
--- a/tuf/api/metadata.py
+++ b/tuf/api/metadata.py
@@ -30,7 +30,7 @@
 import logging
 import tempfile
 from collections import OrderedDict
-from datetime import datetime, timedelta
+from datetime import datetime
 from typing import (
     IO,
     Any,
@@ -409,6 +409,11 @@ def _type(self) -> str:
 
     @property
     def expires(self) -> datetime:
+        """The metadata expiry date::
+
+        # Use 'datetime' module to e.g. expire in seven days from now
+        obj.expires = utcnow() + timedelta(days=7)
+        """
         return self._expires
 
     @expires.setter
@@ -508,11 +513,6 @@ def is_expired(self, reference_time: Optional[datetime] = None) -> bool:
 
         return reference_time >= self.expires
 
-    # Modification.
-    def bump_expiration(self, delta: timedelta = timedelta(days=1)) -> None:
-        """Increments the expires attribute by the passed timedelta."""
-        self.expires += delta
-
     def bump_version(self) -> None:
         """Increments the metadata version number by 1."""
         self.version += 1