diff --git a/tests/rustdoc/invalid.crate.name.rs b/tests/rustdoc/invalid$crate$name.rs
similarity index 100%
rename from tests/rustdoc/invalid.crate.name.rs
rename to tests/rustdoc/invalid$crate$name.rs
diff --git a/tests/ui/command/need-crate-arg-ignore-tidy.x.rs b/tests/ui/command/need-crate-arg-ignore-tidy$x.rs
similarity index 100%
rename from tests/ui/command/need-crate-arg-ignore-tidy.x.rs
rename to tests/ui/command/need-crate-arg-ignore-tidy$x.rs
diff --git a/tests/ui/command/need-crate-arg-ignore-tidy.x.stderr b/tests/ui/command/need-crate-arg-ignore-tidy$x.stderr
similarity index 68%
rename from tests/ui/command/need-crate-arg-ignore-tidy.x.stderr
rename to tests/ui/command/need-crate-arg-ignore-tidy$x.stderr
index 89f7210c048..28f6d31b1ce 100644
--- a/tests/ui/command/need-crate-arg-ignore-tidy.x.stderr
+++ b/tests/ui/command/need-crate-arg-ignore-tidy$x.stderr
@@ -1,4 +1,4 @@
-error: invalid character `'.'` in crate name: `need_crate_arg_ignore_tidy.x`
+error: invalid character `'$'` in crate name: `need_crate_arg_ignore_tidy$x`
    |
    = help: you can either pass `--crate-name` on the command line or add `#![crate_name="…"]` to set the crate name