diff --git a/Makefile b/Makefile
index 97b653a..89f2dd3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,11 @@
 .PHONY: test
 
-test: bin/s7
+test: bin/s7 demo/.godot
 	scons && bin/s7 test/test-main.scm
 
+demo/.godot: $(wildcard demo/addons/**) $(wildcard demo/bin/**)
+	godot --path demo --headless --import
+
 bin/s7: s7/s7.c
 	mkdir -p bin
 	gcc s7/s7.c -o bin/s7 -DWITH_MAIN -DWITH_SYSTEM_EXTRAS -DWITH_C_LOADER=0 -I. -O2 -g -ldl -lm