diff --git a/.github/workflows/python-ci.yml b/.github/workflows/python-ci.yml
index 2983c890af..8e7938caa1 100644
--- a/.github/workflows/python-ci.yml
+++ b/.github/workflows/python-ci.yml
@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        python: ['3.8', '3.9', '3.10', '3.11']
+        python: ['3.11']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/python-integration.yml b/.github/workflows/python-integration.yml
index 6aeae0fc9e..00e9c95656 100644
--- a/.github/workflows/python-integration.yml
+++ b/.github/workflows/python-integration.yml
@@ -31,7 +31,10 @@ concurrency:
 
 jobs:
   integration-test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        python: [ '3.11' ]
 
     steps:
     - uses: actions/checkout@v4
diff --git a/pyiceberg/table/snapshots.py b/pyiceberg/table/snapshots.py
index b21a0f5613..123611a9f5 100644
--- a/pyiceberg/table/snapshots.py
+++ b/pyiceberg/table/snapshots.py
@@ -19,6 +19,7 @@
 import time
 from collections import defaultdict
 from enum import Enum
+from functools import lru_cache
 from typing import TYPE_CHECKING, Any, DefaultDict, Dict, Iterable, List, Mapping, Optional
 
 from pydantic import Field, PrivateAttr, model_serializer
@@ -228,6 +229,15 @@ def __eq__(self, other: Any) -> bool:
         )
 
 
+@lru_cache
+def _manifests(io: FileIO, manifest_list: Optional[str]) -> List[ManifestFile]:
+    """Return the manifests for the given snapshot."""
+    if manifest_list not in (None, ""):
+        file = io.new_input(manifest_list)  # type: ignore
+        return list(read_manifest_list(file))
+    return []
+
+
 class Snapshot(IcebergBaseModel):
     snapshot_id: int = Field(alias="snapshot-id")
     parent_snapshot_id: Optional[int] = Field(alias="parent-snapshot-id", default=None)
@@ -248,10 +258,8 @@ def __str__(self) -> str:
         return result_str
 
     def manifests(self, io: FileIO) -> List[ManifestFile]:
-        if self.manifest_list is not None:
-            file = io.new_input(self.manifest_list)
-            return list(read_manifest_list(file))
-        return []
+        """Return the manifests for the given snapshot."""
+        return _manifests(io, self.manifest_list)
 
 
 class MetadataLogEntry(IcebergBaseModel):