diff --git a/Tests/test_file_webp.py b/Tests/test_file_webp.py
index 6e9eea4ae..6ccd489bb 100644
--- a/Tests/test_file_webp.py
+++ b/Tests/test_file_webp.py
@@ -166,7 +166,7 @@ class TestFileWebp:
         with pytest.raises(TypeError):
             _webp.WebPEncode()
 
-    def test_WebPDecode_with_invalid_args(self) -> None:
+    def test_WebPAnimDecoder_with_invalid_args(self) -> None:
         """
         Calling decoder functions with no arguments should result in an error.
         """