diff --git a/Tests/images/apng/issue_7700.png b/Tests/images/apng/issue_7700.png
new file mode 100644
index 000000000..984254b8e
Binary files /dev/null and b/Tests/images/apng/issue_7700.png differ
diff --git a/Tests/test_file_apng.py b/Tests/test_file_apng.py
index 60d951636..8069d4b08 100644
--- a/Tests/test_file_apng.py
+++ b/Tests/test_file_apng.py
@@ -689,3 +689,13 @@ def test_different_modes_in_later_frames(mode, default_image, duplicate, tmp_pat
     )
     with Image.open(test_file) as reloaded:
         assert reloaded.mode == mode
+
+
+def test_apng_issue_7700():
+    # https://github.com/python-pillow/Pillow/issues/7700
+    with Image.open("Tests/images/apng/issue_7700.png") as im:
+        for i in range(5):
+            im.seek(0)
+            assert im.info["duration"] == 4000.0
+            im.seek(1)
+            assert im.info["duration"] == 1000.0