diff --git a/test/mocha/test-transposing-instruments.js b/test/mocha/test-transposing-instruments.js
new file mode 100644
index 0000000..4681a49
--- /dev/null
+++ b/test/mocha/test-transposing-instruments.js
@@ -0,0 +1,20 @@
+"use strict";
+
+const assert = require('assert');
+const xpath = require('fontoxpath');
+const utils = require('./utils');
+
+const mei = utils.getTestMeiDom('transposing-instruments.mei');
+
+describe("scoreDef", function() {
+    const staffDefs = xpath.evaluateXPath("//*:staffDef", mei);
+    it("@trans.semi", function() {
+        assert.deepStrictEqual(staffDefs.map(s => s.getAttribute("trans.semi")), ["-2", "-7", null]);
+    });
+    it("@trans.diat", function() {
+        assert.deepStrictEqual(staffDefs.map(s => s.getAttribute("trans.diat")), ["-1", "-4", null]);
+    });
+});
+
+// TODO: The test file has an instrument change with changing transposition that
+// is not exported properly
diff --git a/test/sibmeiTestSibs/transposing-instruments.sib b/test/sibmeiTestSibs/transposing-instruments.sib
new file mode 100644
index 0000000..1a71762
Binary files /dev/null and b/test/sibmeiTestSibs/transposing-instruments.sib differ