diff --git a/tests/scene/test_node.h b/tests/scene/test_node.h
index 0ddf0279706..8b0655125df 100644
--- a/tests/scene/test_node.h
+++ b/tests/scene/test_node.h
@@ -37,6 +37,47 @@
 
 namespace TestNode {
 
+class TestNode : public Node {
+	GDCLASS(TestNode, Node);
+
+protected:
+	void _notification(int p_what) {
+		switch (p_what) {
+			case NOTIFICATION_INTERNAL_PROCESS: {
+				internal_process_counter++;
+				push_self();
+			} break;
+			case NOTIFICATION_INTERNAL_PHYSICS_PROCESS: {
+				internal_physics_process_counter++;
+				push_self();
+			} break;
+			case NOTIFICATION_PROCESS: {
+				process_counter++;
+				push_self();
+			} break;
+			case NOTIFICATION_PHYSICS_PROCESS: {
+				physics_process_counter++;
+				push_self();
+			} break;
+		}
+	}
+
+private:
+	void push_self() {
+		if (callback_list) {
+			callback_list->push_back(this);
+		}
+	}
+
+public:
+	int internal_process_counter = 0;
+	int internal_physics_process_counter = 0;
+	int process_counter = 0;
+	int physics_process_counter = 0;
+
+	List<Node *> *callback_list = nullptr;
+};
+
 TEST_CASE("[SceneTree][Node] Testing node operations with a very simple scene tree") {
 	Node *node = memnew(Node);
 
@@ -420,7 +461,7 @@ TEST_CASE("[SceneTree][Node] Testing node operations with a more complex simple
 	memdelete(node2);
 }
 
-TEST_CASE("[Node] Processing") {
+TEST_CASE("[Node] Processing checks") {
 	Node *node = memnew(Node);
 
 	SUBCASE("Processing") {
@@ -507,9 +548,203 @@ TEST_CASE("[Node] Processing") {
 		CHECK_FALSE(node->is_processing_internal());
 	}
 
+	SUBCASE("Process priority") {
+		CHECK_EQ(0, node->get_process_priority());
+
+		node->set_process_priority(1);
+
+		CHECK_EQ(1, node->get_process_priority());
+	}
+
+	SUBCASE("Physics process priority") {
+		CHECK_EQ(0, node->get_physics_process_priority());
+
+		node->set_physics_process_priority(1);
+
+		CHECK_EQ(1, node->get_physics_process_priority());
+	}
+
 	memdelete(node);
 }
 
+TEST_CASE("[SceneTree][Node] Test the processing") {
+	TestNode *node = memnew(TestNode);
+	SceneTree::get_singleton()->get_root()->add_child(node);
+
+	SUBCASE("No process") {
+		CHECK_EQ(0, node->process_counter);
+		CHECK_EQ(0, node->physics_process_counter);
+	}
+
+	SUBCASE("Process") {
+		node->set_process(true);
+		SceneTree::get_singleton()->process(0);
+
+		CHECK_EQ(1, node->process_counter);
+		CHECK_EQ(0, node->physics_process_counter);
+		CHECK_EQ(0, node->internal_process_counter);
+		CHECK_EQ(0, node->internal_physics_process_counter);
+	}
+
+	SUBCASE("Physics process") {
+		node->set_physics_process(true);
+		SceneTree::get_singleton()->physics_process(0);
+
+		CHECK_EQ(0, node->process_counter);
+		CHECK_EQ(1, node->physics_process_counter);
+		CHECK_EQ(0, node->internal_process_counter);
+		CHECK_EQ(0, node->internal_physics_process_counter);
+	}
+
+	SUBCASE("Normal and physics process") {
+		node->set_process(true);
+		node->set_physics_process(true);
+		SceneTree::get_singleton()->process(0);
+		SceneTree::get_singleton()->physics_process(0);
+
+		CHECK_EQ(1, node->process_counter);
+		CHECK_EQ(1, node->physics_process_counter);
+		CHECK_EQ(0, node->internal_process_counter);
+		CHECK_EQ(0, node->internal_physics_process_counter);
+	}
+
+	SUBCASE("Internal, normal and physics process") {
+		node->set_process_internal(true);
+		node->set_physics_process_internal(true);
+		SceneTree::get_singleton()->process(0);
+		SceneTree::get_singleton()->physics_process(0);
+
+		CHECK_EQ(0, node->process_counter);
+		CHECK_EQ(0, node->physics_process_counter);
+		CHECK_EQ(1, node->internal_process_counter);
+		CHECK_EQ(1, node->internal_physics_process_counter);
+	}
+
+	SUBCASE("All processing") {
+		node->set_process(true);
+		node->set_physics_process(true);
+		node->set_process_internal(true);
+		node->set_physics_process_internal(true);
+		SceneTree::get_singleton()->process(0);
+		SceneTree::get_singleton()->physics_process(0);
+
+		CHECK_EQ(1, node->process_counter);
+		CHECK_EQ(1, node->physics_process_counter);
+		CHECK_EQ(1, node->internal_process_counter);
+		CHECK_EQ(1, node->internal_physics_process_counter);
+	}
+
+	SUBCASE("All processing twice") {
+		node->set_process(true);
+		node->set_physics_process(true);
+		node->set_process_internal(true);
+		node->set_physics_process_internal(true);
+		SceneTree::get_singleton()->process(0);
+		SceneTree::get_singleton()->physics_process(0);
+		SceneTree::get_singleton()->process(0);
+		SceneTree::get_singleton()->physics_process(0);
+
+		CHECK_EQ(2, node->process_counter);
+		CHECK_EQ(2, node->physics_process_counter);
+		CHECK_EQ(2, node->internal_process_counter);
+		CHECK_EQ(2, node->internal_physics_process_counter);
+	}
+
+	SUBCASE("Enable and disable processing") {
+		node->set_process(true);
+		node->set_physics_process(true);
+		node->set_process_internal(true);
+		node->set_physics_process_internal(true);
+		SceneTree::get_singleton()->process(0);
+		SceneTree::get_singleton()->physics_process(0);
+
+		node->set_process(false);
+		node->set_physics_process(false);
+		node->set_process_internal(false);
+		node->set_physics_process_internal(false);
+		SceneTree::get_singleton()->process(0);
+		SceneTree::get_singleton()->physics_process(0);
+
+		CHECK_EQ(1, node->process_counter);
+		CHECK_EQ(1, node->physics_process_counter);
+		CHECK_EQ(1, node->internal_process_counter);
+		CHECK_EQ(1, node->internal_physics_process_counter);
+	}
+
+	memdelete(node);
+}
+
+TEST_CASE("[SceneTree][Node] Test the process priority") {
+	List<Node *> process_order;
+
+	TestNode *node = memnew(TestNode);
+	node->callback_list = &process_order;
+	SceneTree::get_singleton()->get_root()->add_child(node);
+
+	TestNode *node2 = memnew(TestNode);
+	node2->callback_list = &process_order;
+	SceneTree::get_singleton()->get_root()->add_child(node2);
+
+	TestNode *node3 = memnew(TestNode);
+	node3->callback_list = &process_order;
+	SceneTree::get_singleton()->get_root()->add_child(node3);
+
+	TestNode *node4 = memnew(TestNode);
+	node4->callback_list = &process_order;
+	SceneTree::get_singleton()->get_root()->add_child(node4);
+
+	SUBCASE("Process priority") {
+		node->set_process(true);
+		node->set_process_priority(20);
+		node2->set_process(true);
+		node2->set_process_priority(10);
+		node3->set_process(true);
+		node3->set_process_priority(40);
+		node4->set_process(true);
+		node4->set_process_priority(30);
+
+		SceneTree::get_singleton()->process(0);
+
+		CHECK_EQ(4, process_order.size());
+		List<Node *>::Element *E = process_order.front();
+		CHECK_EQ(E->get(), node2);
+		E = E->next();
+		CHECK_EQ(E->get(), node);
+		E = E->next();
+		CHECK_EQ(E->get(), node4);
+		E = E->next();
+		CHECK_EQ(E->get(), node3);
+	}
+
+	SUBCASE("Physics process priority") {
+		node->set_physics_process(true);
+		node->set_physics_process_priority(20);
+		node2->set_physics_process(true);
+		node2->set_physics_process_priority(10);
+		node3->set_physics_process(true);
+		node3->set_physics_process_priority(40);
+		node4->set_physics_process(true);
+		node4->set_physics_process_priority(30);
+
+		SceneTree::get_singleton()->physics_process(0);
+
+		CHECK_EQ(4, process_order.size());
+		List<Node *>::Element *E = process_order.front();
+		CHECK_EQ(E->get(), node2);
+		E = E->next();
+		CHECK_EQ(E->get(), node);
+		E = E->next();
+		CHECK_EQ(E->get(), node4);
+		E = E->next();
+		CHECK_EQ(E->get(), node3);
+	}
+
+	memdelete(node);
+	memdelete(node2);
+	memdelete(node3);
+	memdelete(node4);
+}
+
 } // namespace TestNode
 
 #endif // TEST_NODE_H