diff --git a/tests/spec/filer.spec.js b/tests/spec/filer.spec.js
index 0d9b610..19cac28 100644
--- a/tests/spec/filer.spec.js
+++ b/tests/spec/filer.spec.js
@@ -13,4 +13,28 @@ describe('Filer', function() {
   it('has Shell constructor', function() {
     expect(typeof Filer.Shell).to.equal('function');
   });
+
+  it('must honor the \'FORMAT\' flag', function(done) {
+    var fs = new Filer.FileSystem({name: 'local-test'});
+    var fs2 = new Filer.FileSystem({name: 'local-test'});
+
+    fs.mkdir('/test', function(err){
+      if(err) throw err;
+
+      fs2.readdir('/', function(err, list) {
+        if(err) throw err;
+
+        expect(list).to.exist;
+        expect(list).to.have.length(1);
+
+        fs2 = new Filer.FileSystem({name: 'local-test', flags:['FORMAT']});
+        fs2.readdir('/', function(err, list2) {
+          expect(err).to.not.exist;
+          expect(list2).to.exist;
+          expect(list2).to.have.length(0);
+          done();
+        });
+      });
+    });
+  });
 });