diff --git a/test/test_amazon.js b/test/test_amazon.js
index 496d5b7..aa38e82 100644
--- a/test/test_amazon.js
+++ b/test/test_amazon.js
@@ -1,5 +1,6 @@
+'use strict';
 const se_scraper =  require('./../index.js');
-var assert = require('chai').assert;
+const assert = require('chai').assert;
 
 /*
  * Use chai and mocha for tests.
@@ -113,7 +114,6 @@ async function no_results_test() {
 function test_case_no_results(response) {
     assert.equal(response.metadata.num_requests, 1);
 
-    results = response.results;
     for (let query in response.results) {
 
         assert.containsAllKeys(response.results, keywords_no_results, 'not all keywords were scraped.');
@@ -134,7 +134,8 @@ function test_case_no_results(response) {
     }
 }
 
-(async () => {
-    await normal_search_test();
-    await no_results_test();
-})();
\ No newline at end of file
+describe('Amazon', function(){
+    this.timeout(30000);
+    it('normal search test', normal_search_test);
+    it('no results test', no_results_test);  
+});
\ No newline at end of file
diff --git a/test/test_baidu.js b/test/test_baidu.js
index 3e9cba2..887d7d1 100644
--- a/test/test_baidu.js
+++ b/test/test_baidu.js
@@ -1,5 +1,6 @@
+'use strict';
 const se_scraper =  require('./../index.js');
-var assert = require('chai').assert;
+const assert = require('chai').assert;
 
 /*
  * Use chai and mocha for tests.
@@ -80,6 +81,7 @@ function normal_search_test_case(response) {
     }
 }
 
-(async () => {
-    await normal_search_test();
-})();
\ No newline at end of file
+describe('Baidu', function(){
+    this.timeout(30000);
+    it('normal search test', normal_search_test);
+});
\ No newline at end of file
diff --git a/test/test_bing.js b/test/test_bing.js
index 56b1993..b5faff1 100644
--- a/test/test_bing.js
+++ b/test/test_bing.js
@@ -1,3 +1,4 @@
+'use strict';
 const se_scraper =  require('./../index.js');
 const chai = require('chai');
 chai.use(require('chai-string'));
@@ -114,7 +115,6 @@ async function no_results_test() {
 function test_case_no_results(response) {
     assert.equal(response.metadata.num_requests, 1);
 
-    results = response.results;
     for (let query in response.results) {
 
         assert.containsAllKeys(response.results, keywords_no_results, 'not all keywords were scraped.');
@@ -163,7 +163,6 @@ async function effective_query_test() {
 function test_case_effective_query(response) {
     assert.equal(response.metadata.num_requests, 1);
 
-    results = response.results;
     for (let query in response.results) {
 
         assert.containsAllKeys(response.results, effective_query_keywords, 'not all keywords were scraped.');
diff --git a/test/test_duckduckgo.js b/test/test_duckduckgo.js
index 4530faf..39efe6e 100644
--- a/test/test_duckduckgo.js
+++ b/test/test_duckduckgo.js
@@ -1,3 +1,4 @@
+'use strict';
 const se_scraper =  require('./../index.js');
 const chai = require('chai');
 chai.use(require('chai-string'));
diff --git a/test/test_google.js b/test/test_google.js
index c9c49d4..eec387d 100644
--- a/test/test_google.js
+++ b/test/test_google.js
@@ -1,3 +1,4 @@
+'use strict';
 const se_scraper =  require('./../index.js');
 const chai = require('chai');
 chai.use(require('chai-string'));
@@ -110,7 +111,6 @@ async function no_results_test() {
 function test_case_no_results(response) {
     assert.equal(response.metadata.num_requests, 1);
 
-    results = response.results;
     for (let query in response.results) {
 
         assert.containsAllKeys(response.results, keywords_no_results, 'not all keywords were scraped.');
@@ -123,7 +123,7 @@ function test_case_no_results(response) {
 
             assert.containsAllKeys(obj, ['results', 'time', 'no_results', 'num_results', 'effective_query'], 'not all keys are in the object');
 
-            assert(obj.results.length === 0, 'results must have 0 SERP objects');
+            assert.strictEqual(obj.results.length, 0, 'results must have 0 SERP objects');
             assert.equal(obj.no_results, true, 'no results should be true');
             assert.isEmpty(obj.num_results, 'no results should be a empty string');
             assert.typeOf(Date.parse(obj.time), 'number', 'time should be a valid date');
diff --git a/test/test_googleimage.js b/test/test_googleimage.js
index f2b50e5..31f00e9 100644
--- a/test/test_googleimage.js
+++ b/test/test_googleimage.js
@@ -1,5 +1,6 @@
+'use strict';
 const se_scraper =  require('./../index.js');
-var assert = require('chai').assert;
+const assert = require('chai').assert;
 
 /*
  * Use chai and mocha for tests.
@@ -73,6 +74,7 @@ function normal_image_search_test_case(response) {
     }
 }
 
-(async () => {
-    await normal_image_search_test();
-})();
\ No newline at end of file
+describe('Google Image', function(){
+    this.timeout(30000);
+    it('normal image search test', normal_image_search_test);
+});
\ No newline at end of file
diff --git a/test/test_queryargs_google.js b/test/test_queryargs_google.js
index cd4629b..d4b51db 100644
--- a/test/test_queryargs_google.js
+++ b/test/test_queryargs_google.js
@@ -1,5 +1,6 @@
+'use strict';
 const se_scraper =  require('./../index.js');
-var assert = require('chai').assert;
+const assert = require('chai').assert;
 
 const normal_search_keywords = ['apple juice'];
 
@@ -84,6 +85,7 @@ function queryargs_search_test_case(err, response) {
     }
 }
 
-(async () => {
-    await queryargs_search_test();
-})();
+describe('Google with query arguments', function(){
+    this.timeout(30000);
+    it('query args search test', queryargs_search_test);
+});
diff --git a/test/test_ticker_search.js b/test/test_ticker_search.js
index be19858..f8a379f 100644
--- a/test/test_ticker_search.js
+++ b/test/test_ticker_search.js
@@ -1,5 +1,6 @@
+'use strict';
 const se_scraper =  require('./../index.js');
-var assert = require('chai').assert;
+const assert = require('chai').assert;
 
 /*
  * Use chai and mocha for tests.
@@ -208,8 +209,9 @@ function marketwatch_search_test_case(err, response) {
 }
 
 
-(async () => {
-    await reuters_search_test();
-    await cnbc_search_test();
-    await marketwatch_search_test();
-})();
\ No newline at end of file
+describe('Ticker', function(){
+    this.timeout(30000);
+    it('Reuters search test', reuters_search_test);
+    it('CNBC search test', cnbc_search_test);
+    it('Marketwatch search test', marketwatch_search_test);
+});
\ No newline at end of file