diff --git a/src/constants.rs b/src/constants.rs
index 059a806..a0bace7 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -60,5 +60,9 @@ pub static CURRICULUM_MANIFEST: Lazy<HashMap<&'static str, Vec<(&'static str, us
     m.insert("Niveau 1.1", vec![("Passage de Grade 1.1", 13)]);
     // 11 pages (01 to 10)
     m.insert("Niveau 1.2", vec![("Passage de grade 1.2", 10)]);
+    #[cfg(test)]
+    {
+        m.insert("Test Grade", vec![("Doc A", 1), ("Doc B", 2)]);
+    }
     m
 });
diff --git a/src/ui/mod.rs b/src/ui/mod.rs
index f77092d..ba51e35 100644
--- a/src/ui/mod.rs
+++ b/src/ui/mod.rs
@@ -12,6 +12,8 @@ mod setup_test;
 #[cfg(test)]
 mod curriculum_test;
 pub mod systems;
+#[cfg(test)]
+mod systems_test;
 pub mod target;
 
 use bevy::prelude::*;
diff --git a/src/ui/systems_test.rs b/src/ui/systems_test.rs
new file mode 100644
index 0000000..5bf8260
--- /dev/null
+++ b/src/ui/systems_test.rs
@@ -0,0 +1,30 @@
+#[cfg(test)]
+mod tests {
+    use bevy::prelude::*;
+    use crate::components::*;
+    use crate::resources::CurriculumState;
+    use crate::ui::systems::curriculum_document_system;
+
+    #[test]
+    fn test_curriculum_document_system() {
+        let mut app = App::new();
+        app.add_plugins(MinimalPlugins);
+        app.add_systems(Update, curriculum_document_system);
+
+        let mut curr_state = CurriculumState::default();
+        curr_state.selected_grade = Some("Test Grade".to_string());
+        curr_state.selected_document = Some("Doc A".to_string());
+        app.insert_resource(curr_state);
+
+        let _entity = app.world_mut().spawn((
+            Interaction::Pressed,
+            CurriculumDocumentButton,
+        )).id();
+
+        app.update();
+
+        let curr_state = app.world().resource::<CurriculumState>();
+        // Ensure that the document successfully cycles to the next one in the manifest
+        assert_eq!(curr_state.selected_document, Some("Doc B".to_string()));
+    }
+}