diff --git a/test/link/bss/main.zig b/test/link/bss/main.zig
index 9c104fec04..0d69f97450 100644
--- a/test/link/bss/main.zig
+++ b/test/link/bss/main.zig
@@ -4,7 +4,7 @@ const std = @import("std");
 var buffer: [0x1000000]u64 = [1]u64{0} ** 0x1000000;
 
 pub fn main() anyerror!void {
-    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+    var stdout_writer = std.Io.File.stdout().writerStreaming(std.Options.debug_io, &.{});
 
     buffer[0x10] = 1;
 
diff --git a/test/link/elf.zig b/test/link/elf.zig
index 6d9912193b..d5b0eb7519 100644
--- a/test/link/elf.zig
+++ b/test/link/elf.zig
@@ -1323,7 +1323,7 @@ fn testGcSectionsZig(b: *Build, opts: Options) *Step {
             \\extern var live_var2: i32;
             \\extern fn live_fn2() void;
             \\pub fn main() void {
-            \\    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+            \\    var stdout_writer = std.Io.File.stdout().writerStreaming(std.Options.debug_io, &.{});
             \\    stdout_writer.interface.print("{d} {d}\n", .{ live_var1, live_var2 }) catch @panic("fail");
             \\    live_fn2();
             \\}
@@ -1365,7 +1365,7 @@ fn testGcSectionsZig(b: *Build, opts: Options) *Step {
             \\extern var live_var2: i32;
             \\extern fn live_fn2() void;
             \\pub fn main() void {
-            \\    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+            \\    var stdout_writer = std.Io.File.stdout().writerStreaming(std.Options.debug_io, &.{});
             \\    stdout_writer.interface.print("{d} {d}\n", .{ live_var1, live_var2 }) catch @panic("fail");
             \\    live_fn2();
             \\}
diff --git a/test/link/macho.zig b/test/link/macho.zig
index 12a74e0825..ccfecefa44 100644
--- a/test/link/macho.zig
+++ b/test/link/macho.zig
@@ -716,7 +716,7 @@ fn testHelloZig(b: *Build, opts: Options) *Step {
     const exe = addExecutable(b, opts, .{ .name = "main", .zig_source_bytes =
         \\const std = @import("std");
         \\pub fn main() void {
-        \\    std.Io.File.stdout().writeAll("Hello world!\n") catch @panic("fail");
+        \\    std.Io.File.stdout().writeStreamingAll(std.Options.debug_io, "Hello world!\n") catch @panic("fail");
         \\}
     });
 
@@ -2372,7 +2372,7 @@ fn testTlsZig(b: *Build, opts: Options) *Step {
         \\threadlocal var x: i32 = 0;
         \\threadlocal var y: i32 = -1;
         \\pub fn main() void {
-        \\    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+        \\    var stdout_writer = std.Io.File.stdout().writerStreaming(std.Options.debug_io, &.{});
         \\    stdout_writer.interface.print("{d} {d}\n", .{x, y}) catch unreachable;
         \\    x -= 1;
         \\    y += 1;
diff --git a/test/link/wasm/extern/main.zig b/test/link/wasm/extern/main.zig
index a841cc40a6..51c5f84181 100644
--- a/test/link/wasm/extern/main.zig
+++ b/test/link/wasm/extern/main.zig
@@ -3,6 +3,6 @@ const std = @import("std");
 extern const foo: u32;
 
 pub fn main() void {
-    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+    var stdout_writer = std.Io.File.stdout().writerStreaming(std.Options.debug_io, &.{});
     stdout_writer.interface.print("Result: {d}", .{foo}) catch {};
 }
diff --git a/test/standalone/simple/guess_number/main.zig b/test/standalone/simple/guess_number/main.zig
index 25226ec1c8..38082aad9e 100644
--- a/test/standalone/simple/guess_number/main.zig
+++ b/test/standalone/simple/guess_number/main.zig
@@ -1,8 +1,18 @@
 const builtin = @import("builtin");
 const std = @import("std");
 
+// See https://github.com/ziglang/zig/issues/24510
+// for the plan to simplify this code.
 pub fn main() !void {
-    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+    var debug_allocator: std.heap.DebugAllocator(.{}) = .init;
+    defer _ = debug_allocator.deinit();
+    const gpa = debug_allocator.allocator();
+
+    var threaded: std.Io.Threaded = .init(gpa, .{});
+    defer threaded.deinit();
+    const io = threaded.io();
+
+    var stdout_writer = std.Io.File.stdout().writerStreaming(io, &.{});
     const out = &stdout_writer.interface;
     const stdin: std.Io.File = .stdin();
 
diff --git a/test/standalone/simple/hello_world/hello.zig b/test/standalone/simple/hello_world/hello.zig
index 7bb4f00e4d..a031d6c6f0 100644
--- a/test/standalone/simple/hello_world/hello.zig
+++ b/test/standalone/simple/hello_world/hello.zig
@@ -1,5 +1,7 @@
 const std = @import("std");
 
+// See https://github.com/ziglang/zig/issues/24510
+// for the plan to simplify this code.
 pub fn main() !void {
     var debug_allocator: std.heap.DebugAllocator(.{}) = .init;
     defer _ = debug_allocator.deinit();
diff --git a/test/standalone/windows_bat_args/echo-args.zig b/test/standalone/windows_bat_args/echo-args.zig
index 7e73fa54a0..6aeb43d56c 100644
--- a/test/standalone/windows_bat_args/echo-args.zig
+++ b/test/standalone/windows_bat_args/echo-args.zig
@@ -5,7 +5,9 @@ pub fn main() !void {
     defer arena_state.deinit();
     const arena = arena_state.allocator();
 
-    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+    const io = std.Options.debug_io;
+
+    var stdout_writer = std.Io.File.stdout().writerStreaming(io, &.{});
     const stdout = &stdout_writer.interface;
     var args = try std.process.argsAlloc(arena);
     for (args[1..], 1..) |arg, i| {
diff --git a/test/standalone/windows_paths/relative.zig b/test/standalone/windows_paths/relative.zig
index 7f87151ac8..7b6a51b283 100644
--- a/test/standalone/windows_paths/relative.zig
+++ b/test/standalone/windows_paths/relative.zig
@@ -10,10 +10,14 @@ pub fn main() !void {
 
     if (args.len < 3) return error.MissingArgs;
 
+    var threaded: std.Io.Threaded = .init(allocator, .{});
+    defer threaded.deinit();
+    const io = threaded.io();
+
     const relative = try std.fs.path.relative(allocator, args[1], args[2]);
     defer allocator.free(relative);
 
-    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+    var stdout_writer = std.Io.File.stdout().writerStreaming(io, &.{});
     const stdout = &stdout_writer.interface;
     try stdout.writeAll(relative);
 }
diff --git a/test/standalone/windows_spawn/hello.zig b/test/standalone/windows_spawn/hello.zig
index e54bbe0386..51e6aaf8bc 100644
--- a/test/standalone/windows_spawn/hello.zig
+++ b/test/standalone/windows_spawn/hello.zig
@@ -1,7 +1,8 @@
 const std = @import("std");
 
 pub fn main() !void {
-    var stdout_writer = std.Io.File.stdout().writerStreaming(&.{});
+    const io = std.Options.debug_io;
+    var stdout_writer = std.Io.File.stdout().writerStreaming(io, &.{});
     const stdout = &stdout_writer.interface;
     try stdout.writeAll("hello from exe\n");
 }