diff --git a/src/Console/Log.es6 b/src/Console/Log.es6
index 6a56826..11a20d7 100644
--- a/src/Console/Log.es6
+++ b/src/Console/Log.es6
@@ -260,7 +260,8 @@ function formatJs(code)
 
 function formatMsg(args, {htmlForEl = true} = {})
 {
-    args = substituteStr(args);
+    let needStrSubstitution = util.isStr(args[0]) && args.length !== 1;
+    if (needStrSubstitution) args = substituteStr(args);
 
     for (let i = 0, len = args.length; i < len; i++)
     {
@@ -284,7 +285,7 @@ function formatMsg(args, {htmlForEl = true} = {})
         } else
         {
             val = util.toStr(val);
-            if (i !== 0) val = util.escape(val);
+            if (i !== 0 || !needStrSubstitution) val = util.escape(val);
             args[i] = val;
         }
     }
@@ -296,9 +297,7 @@ var formatDir = args => formatMsg(args, {htmlForEl: false});
 
 function substituteStr(args)
 {
-    if (!util.isStr(args[0]) || args.length === 1) return args;
-
-    var str = util.escape(args[0]),
+    let str = util.escape(args[0]),
         isInCss = false,
         newStr = '';
 
diff --git a/test/console.js b/test/console.js
index cd07e18..d7ddaeb 100644
--- a/test/console.js
+++ b/test/console.js
@@ -1,25 +1,29 @@
 var tool = eruda.get('console'),
     $tool = $('.eruda-console');
 
+beforeEach(function ()
+{
+    tool.clear();
+});
+
 describe('log', function ()
 {
+
     it('string', function ()
     {
-        var text = 'This is a log';
+        var text = '<span>This is a log</span>';
 
-        tool.clear().log(text);
+        tool.log(text);
         expect($tool.find('.eruda-log')).toContainText(text);
     });
 
     it('clear', function ()
     {
-        tool.clear();
         expect($tool.find('.eruda-log')).toHaveLength(0);
     });
 
     it('recognize url', function ()
     {
-        tool.clear();
         tool.log('http://liriliri.github.io/eruda/?plugin=fps');
         expect($tool.find('.eruda-log')).toContainHtml('<a href="http://liriliri.github.io/eruda/?plugin=fps" target="_blank">http://liriliri.github.io/eruda/?plugin=fps</a>');
     });
@@ -28,38 +32,38 @@ describe('log', function ()
     {
         var obj = {a: 1};
 
-        tool.clear().log(obj);
+        tool.log(obj);
         expect($tool.find('.eruda-log')).toContainText('Object { a: 1 }');
     });
 
     it('dir html element', function ()
     {
-        tool.clear().dir(document.createElement('script'));
+        tool.dir(document.createElement('script'));
         expect($tool.find('.eruda-log')).not.toContainText('<script></script>');
     });
 
     it('html', function ()
     {
-        tool.clear().html('<span class="color-blue">Blue</span>');
+        tool.html('<span class="color-blue">Blue</span>');
         expect($tool.find('.eruda-html')).toContainElement('span.color-blue');
     });
 
     it('timing', function ()
     {
-        tool.clear().time('eruda');
-        tool.clear().timeEnd('eruda');
+        tool.time('eruda');
+        tool.timeEnd('eruda');
         expect($tool.find('.eruda-html')).toHaveText(/eruda: \d+ms/);
     });
 
     it('error', function ()
     {
-        tool.clear().error(new Error('error test'));
+        tool.error(new Error('error test'));
         expect($tool.find('.eruda-error')).toContainElement('.eruda-stack');
     });
 
     it('assert', function ()
     {
-        tool.clear().assert(true, 'assert');
+        tool.assert(true, 'assert');
         expect($tool.find('.eruda-log-item')).toHaveLength(0);
 
         tool.assert(false, 'assert');
@@ -68,7 +72,7 @@ describe('log', function ()
 
     it('count', function ()
     {
-        tool.clear().count('test').clear();
+        tool.count('test').clear();
         tool.count('test');
         expect($tool.find('.eruda-html')).toContainText('test: 2');
     });
@@ -78,40 +82,39 @@ describe('substitution', function ()
 {
     it('number', function ()
     {
-        tool.clear().log('Eruda is %d', 1.2, 'year old');
+        tool.log('Eruda is %d', 1.2, 'year old');
         expect($tool.find('.eruda-log')).toContainText('Eruda is 1 year old');
 
-        tool.clear().log('%i', 1.2, 'year old');
+        tool.log('%i', 1.2, 'year old');
         expect($tool.find('.eruda-log')).toContainText('1 year old');
 
-        tool.clear().log('%f', 1.2, 'year old');
+        tool.log('%f', 1.2, 'year old');
         expect($tool.find('.eruda-log')).toContainText('1.2 year old');
     });
 
     it('string', function ()
     {
-        tool.clear().log('My name is %s', 'eruda');
+        tool.log('My name is %s', 'eruda');
         expect($tool.find('.eruda-log')).toContainText('My name is eruda');
     });
 
     it('object', function ()
     {
-        tool.clear().log('Object is %O', {a: 1});
+        tool.log('Object is %O', {a: 1});
         expect($tool.find('.eruda-log')).toContainText('Object is { a: 1 }');
 
-        tool.clear().log('Dom is %o', document.createElement('script'));
+        tool.log('Dom is %o', document.createElement('script'));
         expect($tool.find('.eruda-log')).toContainText('Dom is <script></script>');
     });
 
     it('style', function ()
     {
-        tool.clear().log('%cblue%cgreen', 'color:blue', 'color:green');
+        tool.log('%cblue%cgreen', 'color:blue', 'color:green');
         expect($tool.find('.eruda-log')).toContainHtml('<span style="color:blue">blue</span><span style="color:green">green</span>');
     });
 
     it('Repeat log', function ()
     {
-        tool.clear();
         for (var i = 0; i < 10; i++) tool.log(1);
         var $log = $tool.find('.eruda-log-item');
         expect($log).toHaveLength(1);
@@ -123,26 +126,26 @@ describe('table', function ()
 {
     it('wrong args', function ()
     {
-        tool.clear().table('test');
+        tool.table('test');
         expect($tool.find('.eruda-table')).not.toContainElement('table');
     });
 
     it('sort keys', function ()
     {
-        tool.clear().table([{a: 1}, {d: 2, a: 2}, {c: 1}]);
+        tool.table([{a: 1}, {d: 2, a: 2}, {c: 1}]);
         expect($tool.find('.eruda-table thead tr')).toContainHtml('<th>(index)</th><th>a</th><th>c</th><th>d</th>');
     });
 
     it('basic', function ()
     {
-        tool.clear().table([{test: 1}, {test: 2, test2: 3}]);
+        tool.table([{test: 1}, {test: 2, test2: 3}]);
         expect($tool.find('.eruda-table tbody tr')).toHaveLength(2);
         expect($tool.find('.eruda-table thead th')).toHaveLength(3);
     });
 
     it('filter', function ()
     {
-        tool.clear().table([{test: 1}, {test: 2, test2: 3}], 'test');
+        tool.table([{test: 1}, {test: 2, test2: 3}], 'test');
         expect($tool.find('.eruda-table thead th')).toHaveLength(2);
     });
 });
@@ -152,7 +155,7 @@ describe('filter', function ()
     // Test case from https://github.com/liriliri/eruda/issues/14
     it('function', function ()
     {
-        tool.clear().filter(function (log)
+        tool.filter(function (log)
         {
             return log.type !== 'error';
         });
@@ -174,7 +177,7 @@ describe('filter', function ()
 
     it('all info error warn log', function ()
     {
-        tool.clear().log('log').info('info').error('error').warn('warn').debug('debug');
+        tool.log('log').info('info').error('error').warn('warn').debug('debug');
         expect($tool.find('.eruda-log-item')).toHaveLength(5);
 
         tool.filter('info');
@@ -198,7 +201,7 @@ describe('filter', function ()
 
     it('regex', function ()
     {
-        tool.clear().log('test').log('test2');
+        tool.log('test').log('test2');
         expect($tool.find('.eruda-log-item')).toHaveLength(2);
 
         tool.filter(/test2/);
@@ -216,7 +219,6 @@ describe('config', function ()
     it('max number', function ()
     {
         config.set('maxLogNum', '10');
-        tool.clear();
         for (var i = 0; i < 20; i++) tool.log(i);
         expect($tool.find('.eruda-log-item')).toHaveLength(10);
     });
@@ -224,7 +226,6 @@ describe('config', function ()
     it('override console', function ()
     {
         config.set('overrideConsole', true);
-        console.clear();
         console.log('test');
         expect($tool.find('.eruda-log-item')).toContainText('test');
     });
@@ -232,7 +233,7 @@ describe('config', function ()
     it('display extra info', function ()
     {
         config.set('displayExtraInfo', true);
-        tool.clear().log('test');
+        tool.log('test');
         expect($tool.find('.eruda-logs li')).toContainElement('.eruda-header');
     });
 });