1 files changed, 3 insertions, 5 deletions
diff --git a/library/std/src/sys_common/mod.rs b/library/std/src/sys_common/mod.rs
index 840f9093e00..28cdfefb12a 100644
--- a/library/std/src/sys_common/mod.rs
+++ b/library/std/src/sys_common/mod.rs
@@ -15,6 +15,9 @@
 #![allow(missing_docs)]
 #![allow(missing_debug_implementations)]
 
+#[cfg(test)]
+mod tests;
+
 use crate::sync::Once;
 use crate::sys;
 
@@ -141,8 +144,3 @@ pub fn mul_div_u64(value: u64, numer: u64, denom: u64) -> u64 {
     // r < denom, so (denom*numer) is the upper bound of (r*numer)
     q * numer + r * numer / denom
 }
-
-#[test]
-fn test_muldiv() {
-    assert_eq!(mul_div_u64(1_000_000_000_001, 1_000_000_000, 1_000_000), 1_000_000_000_001_000);
-}