diff --git a/tests/spec/fs.copyFile.spec.js b/tests/spec/fs.copyFile.spec.js
index 940f2fb..a61a762 100644
--- a/tests/spec/fs.copyFile.spec.js
+++ b/tests/spec/fs.copyFile.spec.js
@@ -1,5 +1,6 @@
 var util = require('../lib/test-utils.js');
 var expect = require('chai').expect;
+const { COPYFILE_EXCL } = require('../../src/constants').fsConstants;
 
 // Waiting on implementation to land https://github.com/filerjs/filer/issues/436
 describe.skip('fs.copyFile', function() {
@@ -45,4 +46,19 @@ describe.skip('fs.copyFile', function() {
       });
     });
   });
+
+  it('should return an error if flag=COPYFILE_EXCL and the destination file exists', function (done) {
+    var fs = util.fs();
+    const destPath = '/destfile';
+
+    fs.writeFile(destPath, 'data', function(error) {
+      if(error) throw error;
+
+      fs.copyFile(file.path, destPath, COPYFILE_EXCL, function(error) {
+        expect(error).to.exist;
+        expect(error.code).to.equal('ENOENT');
+        done();
+      });  
+    });
+  });
 });