diff --git a/test/standalone/child_spawn_fail/main.zig b/test/standalone/child_spawn_fail/main.zig
index 7c3f1baaaf..1f4add59e4 100644
--- a/test/standalone/child_spawn_fail/main.zig
+++ b/test/standalone/child_spawn_fail/main.zig
@@ -11,7 +11,7 @@ pub fn main() !void {
     _ = args.next() orelse unreachable; // skip executable name
     const child_path = args.next() orelse unreachable;
 
-    const argv = if (builtin.os.tag == .windows) &.{""} else &.{ child_path, "30" };
+    const argv = &.{""};
     var child = std.process.Child.init(argv, gpa);
     child.stdin_behavior = .Ignore;
     child.stderr_behavior = .Ignore;
@@ -23,7 +23,9 @@ pub fn main() !void {
     }
 
     if (child.spawn()) {
-        return error.SpawnSilencedError;
+        if (child.waitForSpawn()) {
+            return error.SpawnSilencedError;
+        } else |_| {}
     } else |_| {}
 
     child = std.process.Child.init(&.{ child_path, "30" }, gpa);
diff --git a/test/standalone/detached_child/main.zig b/test/standalone/detached_child/main.zig
index 16f3fb2b4a..57e1735218 100644
--- a/test/standalone/detached_child/main.zig
+++ b/test/standalone/detached_child/main.zig
@@ -24,6 +24,7 @@ pub fn main() !void {
     child.stdout_behavior = .Pipe;
     child.detached = true;
     try child.spawn();
+    try child.waitForSpawn();
     defer {
         _ = child.kill() catch {};
     }