1 files changed, 9 insertions, 0 deletions
diff --git a/build.zig b/build.zig
index 40058407..a462c581 100644
--- a/build.zig
+++ b/build.zig
@@ -743,6 +743,15 @@ pub fn build(b: *std.Build) void {
         }) });
         const unit_step = b.step("unit-test", "run the modal.zig + crt.zig + deck replay + core unit tests");
         unit_step.dependOn(&b.addRunArtifact(unit).step);
+        // Native config path/loading is std-only and has its own hermetic
+        // filesystem/environment tests. The core receives bytes through
+        // Options, so this IO module stays outside the core module graph.
+        const user_config_test = b.addTest(.{ .root_module = b.createModule(.{
+            .target = target,
+            .optimize = optimize,
+            .root_source_file = b.path("src/user_config.zig"),
+        }) });
+        unit_step.dependOn(&b.addRunArtifact(user_config_test).step);
         // crt.zig is pure std — the mouse-mapping-vs-shader-formula test
         const crt_test = b.addTest(.{ .root_module = b.createModule(.{
             .target = target,