diff --git a/lib/std/math/isnan.zig b/lib/std/math/isnan.zig
index cb929e5890..a85100ba90 100644
--- a/lib/std/math/isnan.zig
+++ b/lib/std/math/isnan.zig
@@ -32,7 +32,13 @@ test isSignalNan {
         // TODO: Signalling NaN values get converted to quiet NaN values in
         //       some cases where they shouldn't such that this can fail.
         //       See https://github.com/ziglang/zig/issues/14366
-        // try expect(isSignalNan(math.snan(T)));
+        if (!builtin.cpu.arch.isArmOrThumb() and
+            !builtin.cpu.arch.isAARCH64() and
+            !builtin.cpu.arch.isPowerPC() and
+            builtin.zig_backend != .stage2_c)
+        {
+            try expect(isSignalNan(math.snan(T)));
+        }
         try expect(!isSignalNan(math.nan(T)));
         try expect(!isSignalNan(@as(T, 1.0)));
         try expect(!isSignalNan(math.inf(T)));