diff --git a/test/fiddle/test_fiddle.rb b/test/fiddle/test_fiddle.rb
index 69d0c3d1..542fdbe7 100644
--- a/test/fiddle/test_fiddle.rb
+++ b/test/fiddle/test_fiddle.rb
@@ -83,7 +83,7 @@ def test_dlopen_linker_script_group_linux
     handle = Fiddle.dlopen("libc.so")
     begin
       assert_equal("libc.so",
-                   File.basename(handle.file_name, ".*"))
+                   File.basename(handle.file_name).gsub(/\.so(\.\d+)+\z/, ".so"))
     ensure
       handle.close
     end