diff --git a/src/libcore/run.rs b/src/libcore/run.rs
index 701ab1c59df5..2ca0449cb59f 100644
--- a/src/libcore/run.rs
+++ b/src/libcore/run.rs
@@ -617,6 +617,7 @@ mod tests {
 
     #[test]
     #[should_fail]
+    #[ignore(cfg(windows))]
     fn waitpid_non_existant_pid() {
         run::waitpid(123456789); // assume that this pid doesn't exist
     }