diff --git a/tests/test_attachments.scad b/tests/test_attachments.scad
new file mode 100644
index 0000000..4985cd2
--- /dev/null
+++ b/tests/test_attachments.scad
@@ -0,0 +1,8 @@
+include<../std.scad>
+
+
+module test__standard_anchors() {
+    assert_equal(_standard_anchors(), [[-1,-1,1],[0,-1,1],[1,-1,1],[-1,0,1],[0,0,1],[1,0,1],[-1,1,1],[0,1,1],[1,1,1],[-1,-1,0],[0,-1,0],[1,-1,0],[-1,0,0],[0,0,0],[1,0,0],[-1,1,0],[0,1,0],[1,1,0],[-1,-1,-1],[0,-1,-1],[1,-1,-1],[-1,0,-1],[0,0,-1],[1,0,-1],[-1,1,-1],[0,1,-1],[1,1,-1]]);
+}
+test__standard_anchors();
+