diff --git a/test/link.zig b/test/link.zig
index 01edd07261d05ba943e449528ba410625951e68e..a8a39a7018c3912d624b349988cdcf34dcb56b5d 100644
--- a/test/link.zig
+++ b/test/link.zig
@@ -3,11 +3,6 @@ const builtin = @import("builtin");
 const tests = @import("tests.zig");
 
 pub fn addCases(cases: *tests.StandaloneContext) void {
-    if (builtin.os.tag == .windows) {
-        // https://github.com/ziglang/zig/issues/12421
-        return;
-    }
-
     cases.addBuildFile("test/link/bss/build.zig", .{
         .build_modes = false, // we only guarantee zerofill for undefined in Debug
     });
@@ -28,10 +23,6 @@ pub fn addCases(cases: *tests.StandaloneContext) void {
         .build_modes = true,
     });
 
-    cases.addBuildFile("test/link/tls/build.zig", .{
-        .build_modes = true,
-    });
-
     cases.addBuildFile("test/link/wasm/type/build.zig", .{
         .build_modes = true,
         .requires_stage2 = true,
@@ -115,4 +106,8 @@ pub fn addCases(cases: *tests.StandaloneContext) void {
         .build_modes = true,
         .requires_macos_sdk = true,
     });
+
+    cases.addBuildFile("test/link/macho/tls/build.zig", .{
+        .build_modes = true,
+    });
 }
diff --git a/test/link/macho/tls/a.c b/test/link/macho/tls/a.c
new file mode 100644
index 0000000000000000000000000000000000000000..8602d0241945132d6e1248398d0986f15e6255ac
--- /dev/null
+++ b/test/link/macho/tls/a.c
@@ -0,0 +1,5 @@
+_Thread_local int a;
+
+int getA() {
+  return a;
+}
diff --git a/test/link/macho/tls/build.zig b/test/link/macho/tls/build.zig
new file mode 100644
index 0000000000000000000000000000000000000000..7bf3ea1c9e14b41a626eb5d9f192353bede2ee16
--- /dev/null
+++ b/test/link/macho/tls/build.zig
@@ -0,0 +1,19 @@
+const Builder = @import("std").build.Builder;
+
+pub fn build(b: *Builder) void {
+    const mode = b.standardReleaseOptions();
+    const target: std.zig.CrossTarget = .{ .os_tag = .macos };
+
+    const lib = b.addSharedLibrary("a", null, b.version(1, 0, 0));
+    lib.setBuildMode(mode);
+    lib.addCSourceFile("a.c", &.{});
+    lib.linkLibC();
+
+    const test_exe = b.addTest("main.zig");
+    test_exe.setBuildMode(mode);
+    test_exe.linkLibrary(lib);
+    test_exe.linkLibC();
+
+    const test_step = b.step("test", "Test it");
+    test_step.dependOn(&test_exe.step);
+}
diff --git a/test/link/macho/tls/main.zig b/test/link/macho/tls/main.zig
new file mode 100644
index 0000000000000000000000000000000000000000..ab01616e311ee7706b688fc2008ab7b056d4b124
--- /dev/null
+++ b/test/link/macho/tls/main.zig
@@ -0,0 +1,15 @@
+const std = @import("std");
+
+extern threadlocal var a: i32;
+extern fn getA() i32;
+
+fn getA2() i32 {
+    return a;
+}
+
+test {
+    a = 2;
+    try std.testing.expect(getA() == 2);
+    try std.testing.expect(2 == getA2());
+    try std.testing.expect(getA() == getA2());
+}
diff --git a/test/link/tls/a.c b/test/link/tls/a.c
deleted file mode 100644
index 8602d0241945132d6e1248398d0986f15e6255ac..0000000000000000000000000000000000000000
--- a/test/link/tls/a.c
+++ /dev/null
@@ -1,5 +0,0 @@
-_Thread_local int a;
-
-int getA() {
-  return a;
-}
diff --git a/test/link/tls/build.zig b/test/link/tls/build.zig
deleted file mode 100644
index ebf15ca4399a349e29c8c9c5722b70dc25774cc6..0000000000000000000000000000000000000000
--- a/test/link/tls/build.zig
+++ /dev/null
@@ -1,18 +0,0 @@
-const Builder = @import("std").build.Builder;
-
-pub fn build(b: *Builder) void {
-    const mode = b.standardReleaseOptions();
-
-    const lib = b.addSharedLibrary("a", null, b.version(1, 0, 0));
-    lib.setBuildMode(mode);
-    lib.addCSourceFile("a.c", &.{});
-    lib.linkLibC();
-
-    const test_exe = b.addTest("main.zig");
-    test_exe.setBuildMode(mode);
-    test_exe.linkLibrary(lib);
-    test_exe.linkLibC();
-
-    const test_step = b.step("test", "Test it");
-    test_step.dependOn(&test_exe.step);
-}
diff --git a/test/link/tls/main.zig b/test/link/tls/main.zig
deleted file mode 100644
index ab01616e311ee7706b688fc2008ab7b056d4b124..0000000000000000000000000000000000000000
--- a/test/link/tls/main.zig
+++ /dev/null
@@ -1,15 +0,0 @@
-const std = @import("std");
-
-extern threadlocal var a: i32;
-extern fn getA() i32;
-
-fn getA2() i32 {
-    return a;
-}
-
-test {
-    a = 2;
-    try std.testing.expect(getA() == 2);
-    try std.testing.expect(2 == getA2());
-    try std.testing.expect(getA() == getA2());
-}