diff --git a/package-lock.json b/package-lock.json
index 4963ab7705e..fbd28d90f75 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3782,9 +3782,9 @@
       }
     },
     "mongodb-core": {
-      "version": "3.1.4",
-      "resolved": "https://registry.npmjs.org/mongodb-core/-/mongodb-core-3.1.4.tgz",
-      "integrity": "sha512-T/8bLitfnnTv00P041gzgUMf9eyXoLnJsQjc0Ne7YEoUPLr3fMWERzhMx1MZ2GNjPF+7PzXVFwh30xE4YFNF3w==",
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/mongodb-core/-/mongodb-core-3.1.5.tgz",
+      "integrity": "sha512-emT/tM4ZBinqd6RZok+EzDdtN4LjYJIckv71qQVOEFmvXgT5cperZegVmTgox/1cx4XQu6LJ5ZuIwipP/eKdQg==",
       "requires": {
         "bson": "^1.1.0",
         "require_optional": "^1.0.1",
diff --git a/test/functional/gridfs_tests.js b/test/functional/gridfs_tests.js
index 5fb301c8dd3..28afedc638b 100644
--- a/test/functional/gridfs_tests.js
+++ b/test/functional/gridfs_tests.js
@@ -1568,7 +1568,6 @@ describe('GridFS', function() {
                     test.equal('llo world!', chunk.toString());
                   });
 
-                  stream.on('readable', function() {});
                   stream.on('end', function() {
                     client.close();
                     done();