diff --git a/src/tools/tidy/src/lib.rs b/src/tools/tidy/src/lib.rs
index cbcc01dc39a68..fcb27dae9ea90 100644
--- a/src/tools/tidy/src/lib.rs
+++ b/src/tools/tidy/src/lib.rs
@@ -53,6 +53,7 @@ pub mod unstable_book;
 
 fn filter_dirs(path: &Path) -> bool {
     let skip = [
+        "tidy-test-file",
         "compiler/rustc_codegen_cranelift",
         "src/llvm-project",
         "library/backtrace",