diff --git a/packages/error-reporting/src/google-apis/auth-client.js b/packages/error-reporting/src/google-apis/auth-client.js
index 1459e929261..c5c99596e17 100644
--- a/packages/error-reporting/src/google-apis/auth-client.js
+++ b/packages/error-reporting/src/google-apis/auth-client.js
@@ -18,7 +18,6 @@
 'use strict';
 const common = require('@google-cloud/common');
 const pkg = require('../../package.json');
-var logger = require('../logger.js');
 var is = require('is');
 var isFunction = is.fn;
 var isString = is.string;
@@ -120,7 +119,7 @@ class RequestHandler extends common.Service {
         method: 'POST',
         json: {}
       }, (err, body, response) => {
-        if (err && err.message !== 'Message cannot be empty.' && 
+        if (err && err.message !== 'Message cannot be empty.' &&
             response.statusCode === 400) {
           this._logger.error([
             'Encountered an error while attempting to validate the provided',
diff --git a/packages/error-reporting/utils/fuzzer.js b/packages/error-reporting/utils/fuzzer.js
index 956a688aae3..c9fa25d92bb 100644
--- a/packages/error-reporting/utils/fuzzer.js
+++ b/packages/error-reporting/utils/fuzzer.js
@@ -23,10 +23,8 @@ var maxBy = require('lodash.maxby');
 var random = require('lodash.random');
 var is = require('is');
 var isNumber = is.number;
-var isObject = is.object;
 var isString = is.string;
 var isArray = is.array;
-var isNull = is.null;
 var isFunction = is.function;
 
 function Fuzzer() { }
@@ -202,7 +200,6 @@ Fuzzer.prototype.generate.object = function(numProperties, currentDepth, allowed
 
 Fuzzer.prototype._backFillUnevenTypesArrays = function(argsTypesArray) {
 
-  var largestIndex = 0;
   var largestLength = (maxBy(
     argsTypesArray
     , function(o) { return o.length }
@@ -292,7 +289,6 @@ Fuzzer.prototype._generateValuesForFuzzTyping = function(typesToFuzzOnEach, inde
 Fuzzer.prototype.fuzzFunctionForTypes = function(fnToFuzz, expectsArgTypes, cb, withContext) {
   var expectsArgTypesChecked = isArray(expectsArgTypes) ? expectsArgTypes : [];
   var typesToFuzzOnEach = this._generateTypesToFuzzWith(expectsArgTypesChecked);
-  var withContextChecked = (withContext !== undefined) ? withContext : null;
 
   var returnValue = undefined;