diff --git a/lib/std/tests/fs_test.ri b/lib/std/tests/fs_test.ri
index e398d1fca..480062237 100644
--- a/lib/std/tests/fs_test.ri
+++ b/lib/std/tests/fs_test.ri
@@ -118,7 +118,7 @@ test "std.fs.Path.extension()" {
     @assert(Path.extension("/file.ext") == ".ext");
     @assert(Path.extension("/file.ext.") == "");
     @assert(Path.extension("/very-long-file.bruh") == ".bruh");
-    @assert(Path.extension("/a.b.c") == "");
+    @assert(Path.extension("/a.b.c") == ".c");
     @assert(Path.extension("/a.b.c/") == "");
 
     @assert(Path.extension("/foo/bar/bam/") == "");