diff --git a/src/liballoc/tests/str.rs b/src/liballoc/tests/str.rs
index 2edd41a70b945..1a47e5433ea90 100644
--- a/src/liballoc/tests/str.rs
+++ b/src/liballoc/tests/str.rs
@@ -479,6 +479,7 @@ mod slice_index {
     }
 
     #[test]
+    #[cfg(not(target_arch = "asmjs"))] // hits an OOM
     fn simple_big() {
         fn a_million_letter_x() -> String {
             let mut i = 0;