diff --git a/lib/std/hash/auto_hash.zig b/lib/std/hash/auto_hash.zig
index 32f4f4378f..56cb4c726c 100644
--- a/lib/std/hash/auto_hash.zig
+++ b/lib/std/hash/auto_hash.zig
@@ -374,12 +374,6 @@ test "testHash struct" {
 }
 
 test "testHash union" {
-    const builtin = @import("builtin");
-    if (builtin.zig_backend == .stage2_llvm and builtin.mode == .ReleaseSafe) {
-        // https://github.com/ziglang/zig/issues/12178
-        return error.SkipZigTest;
-    }
-
     const Foo = union(enum) {
         A: u32,
         B: bool,