diff --git a/test/tests.zig b/test/tests.zig
index 8a417f7fc3..c2445037e4 100644
--- a/test/tests.zig
+++ b/test/tests.zig
@@ -2487,7 +2487,7 @@ fn addOneModuleTest(
         .zig_lib_dir = b.path("lib"),
     });
     these_tests.linkage = test_target.linkage;
-    if (options.no_builtin) these_tests.root_module.no_builtin = false;
+    if (options.no_builtin) these_tests.root_module.no_builtin = true;
     if (options.build_options) |build_options| {
         these_tests.root_module.addOptions("build_options", build_options);
     }