diff --git a/src/main.zig b/src/main.zig
index 7500a609..aaa24593 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -3,6 +3,7 @@ pub usingnamespace @import("enums.zig");
 pub const Core = @import("Core.zig");
 pub const Timer = @import("Timer.zig");
 pub const ResourceManager = @import("resource/ResourceManager.zig");
+
 pub const gpu = @import("gpu");
 pub const ecs = @import("ecs");
 pub const sysaudio = @import("sysaudio");
@@ -13,6 +14,12 @@ pub const earcut = @import("earcut");
 pub const App = @import("engine.zig").App;
 pub const module = @import("engine.zig").module;
 
+const std = @import("std");
+const testing = std.testing;
+
 test {
-    _ = void;
+    // TODO: can't reference because they import "app"
+    // testing.refAllDeclsRecursive(Core);
+    // testing.refAllDeclsRecursive(Timer);
+    testing.refAllDeclsRecursive(ResourceManager);
 }