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-rw-r--r--library/std/src/io/copy/tests.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/library/std/src/io/copy/tests.rs b/library/std/src/io/copy/tests.rs
index 2e0eb6cdce6..25b1ece2745 100644
--- a/library/std/src/io/copy/tests.rs
+++ b/library/std/src/io/copy/tests.rs
@@ -126,6 +126,7 @@ mod io_benches {
     use crate::io::prelude::*;
 
     #[bench]
+    #[cfg_attr(target_os = "emscripten", ignore)] // no /dev
     fn bench_copy_buf_reader(b: &mut Bencher) {
         let mut file_in = File::open("/dev/zero").expect("opening /dev/zero failed");
         // use dyn to avoid specializations unrelated to readbuf