diff --git a/test/behavior/union.zig b/test/behavior/union.zig
index 5acb1b5abc..a3ce6169a5 100644
--- a/test/behavior/union.zig
+++ b/test/behavior/union.zig
@@ -1820,10 +1820,8 @@ test "reinterpret packed union" {
     try comptime S.doTheTest();
 
     if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
-    if (builtin.cpu.arch.isPowerPC()) return error.SkipZigTest; // https://github.com/ziglang/zig/issues/21050
-    if (builtin.cpu.arch.isMIPS()) return error.SkipZigTest; // https://github.com/ziglang/zig/issues/21050
     if (builtin.cpu.arch.isWasm()) return error.SkipZigTest; // TODO
-    if (builtin.cpu.arch == .s390x and builtin.zig_backend == .stage2_llvm) return error.SkipZigTest; // TODO
+    if (builtin.cpu.arch.endian() == .big) return error.SkipZigTest; // https://github.com/ziglang/zig/issues/21050
     try S.doTheTest();
 }