diff --git a/lib/std/Io/RwLock.zig b/lib/std/Io/RwLock.zig
index 7be4f026e1..fff958efe9 100644
--- a/lib/std/Io/RwLock.zig
+++ b/lib/std/Io/RwLock.zig
@@ -114,6 +114,8 @@ test "internal state" {
 }
 
 test "smoke test" {
+    if (builtin.target.cpu.arch.isAARCH64() and builtin.target.os.tag == .netbsd) return error.SkipZigTest; // https://codeberg.org/ziglang/zig/issues/31393
+
     const io = testing.io;
 
     var rl: Io.RwLock = .init;