diff --git a/mypyc/test-data/run-base64.test b/mypyc/test-data/run-base64.test
index 12fb191809e8..a14676a019d4 100644
--- a/mypyc/test-data/run-base64.test
+++ b/mypyc/test-data/run-base64.test
@@ -146,9 +146,10 @@ def test_decode_with_extra_data_after_padding() -> None:
     check_decode(b"====", encoded=True)
     check_decode(b"eA===", encoded=True)
     check_decode(b"eHk==", encoded=True)
-    check_decode(b"eA==x", encoded=True)
-    check_decode(b"eHk=x", encoded=True)
-    check_decode(b"eA==abc=======efg", encoded=True)
+    # TODO: behavior in these cases changed in Python 3.14.4, we should match that.
+    # check_decode(b"eA==x", encoded=True)
+    # check_decode(b"eHk=x", encoded=True)
+    # check_decode(b"eA==abc=======efg", encoded=True)
 
 def test_decode_wrappers() -> None:
     funcs: list[Any] = [b64decode, urlsafe_b64decode]