diff --git a/Tests/test_features.py b/Tests/test_features.py
index de418115e..b7eefa09a 100644
--- a/Tests/test_features.py
+++ b/Tests/test_features.py
@@ -38,7 +38,9 @@ def test_version() -> None:
             assert function(name) == version
             if name != "PIL":
                 if name == "zlib" and version is not None:
-                    version = version.replace(".zlib-ng", "")
+                    version = re.sub(".zlib-ng$", "", version)
+                elif name == "libtiff" and version is not None:
+                    version = re.sub("t$", "", version)
                 assert version is None or re.search(r"\d+(\.\d+)*$", version)
 
     for module in features.modules: