diff --git a/npm/test.sh b/npm/test.sh
index a2757b4a0..6b340c5d0 100755
--- a/npm/test.sh
+++ b/npm/test.sh
@@ -59,6 +59,9 @@ else
     # check for .gitignore, license.md, readme.md, .eslintrc and package.json
     mocha ./test/system/repository.test.js;
 
+    # runs test to see if the codegen interface is implemented correctly
+    mocha ./test/unit/lib.test.js;
+
     # Common structure and npm test for each codegen.
     echo -e "Running codegen-structure tests on all the codegens";
     for directory in codegens/*; do
diff --git a/test/unit/lib.test.js b/test/unit/lib.test.js
new file mode 100644
index 000000000..77ad8c314
--- /dev/null
+++ b/test/unit/lib.test.js
@@ -0,0 +1,19 @@
+const expect = require('chai').expect,
+  lib = require('../../lib'),
+  labels = require('../../lib/assets/languageLabels.json');
+
+describe('lib', function () {
+  describe('getLanguageList', function () {
+    it('should test that each language has a valid label', function () {
+      const list = lib.getLanguageList();
+
+      expect(list).to.be.an('array');
+
+      list.forEach(function (lang) {
+        expect(lang).to.have.property('key');
+        expect(lang).to.have.property('label');
+        expect(lang.label).to.equal(labels[lang.key]);
+      });
+    });
+  });
+});