1 files changed, 3 insertions, 17 deletions
diff --git a/library/std/src/sys/windows/os.rs b/library/std/src/sys/windows/os.rs
index a0da2498bb7..77c378a66af 100644
--- a/library/std/src/sys/windows/os.rs
+++ b/library/std/src/sys/windows/os.rs
@@ -2,6 +2,9 @@
 
 #![allow(nonstandard_style)]
 
+#[cfg(test)]
+mod tests;
+
 use crate::os::windows::prelude::*;
 
 use crate::error::Error as StdError;
@@ -328,20 +331,3 @@ pub fn exit(code: i32) -> ! {
 pub fn getpid() -> u32 {
     unsafe { c::GetCurrentProcessId() as u32 }
 }
-
-#[cfg(test)]
-mod tests {
-    use crate::io::Error;
-    use crate::sys::c;
-
-    // tests `error_string` above
-    #[test]
-    fn ntstatus_error() {
-        const STATUS_UNSUCCESSFUL: u32 = 0xc000_0001;
-        assert!(
-            !Error::from_raw_os_error((STATUS_UNSUCCESSFUL | c::FACILITY_NT_BIT) as _)
-                .to_string()
-                .contains("FormatMessageW() returned error")
-        );
-    }
-}