diff --git a/google/cloud/storage/bucket.py b/google/cloud/storage/bucket.py
index 31c4117b5..be99ad141 100644
--- a/google/cloud/storage/bucket.py
+++ b/google/cloud/storage/bucket.py
@@ -377,6 +377,8 @@ def from_api_repr(cls, resource):
 class LifecycleRuleAbortIncompleteMultipartUpload(dict):
     """Map a rule aborting incomplete multipart uploads of matching items.
 
+    The "age" lifecycle condition is the only supported condition for this rule.
+
     :type kw: dict
     :params kw: arguments passed to :class:`LifecycleRuleConditions`.
     """
@@ -2344,6 +2346,9 @@ def add_lifecycle_set_storage_class_rule(self, storage_class, **kw):
     def add_lifecycle_abort_incomplete_multipart_upload_rule(self, **kw):
         """Add a "abort incomplete multipart upload" rule to lifestyle rules.
 
+        Note that the "age" lifecycle condition is the only supported condition
+        for this rule.
+
         See https://cloud.google.com/storage/docs/lifecycle and
              https://cloud.google.com/storage/docs/json_api/v1/buckets
 
diff --git a/tests/system/test_bucket.py b/tests/system/test_bucket.py
index 7905c8956..7d7d7a4a7 100644
--- a/tests/system/test_bucket.py
+++ b/tests/system/test_bucket.py
@@ -94,9 +94,21 @@ def test_bucket_lifecycle_rules(storage_client, buckets_to_delete):
     assert bucket.name == bucket_name
     assert list(bucket.lifecycle_rules) == expected_rules
 
+    # Test modifying lifecycle rules
+    expected_rules[0] = LifecycleRuleDelete(age=30)
+    rules = list(bucket.lifecycle_rules)
+    rules[0]["condition"] = {"age": 30}
+    bucket.lifecycle_rules = rules
+    bucket.patch()
+
+    bucket.reload()
+    assert list(bucket.lifecycle_rules) == expected_rules
+
+    # Test clearing lifecycle rules
     bucket.clear_lifecyle_rules()
     bucket.patch()
 
+    bucket.reload()
     assert list(bucket.lifecycle_rules) == []