diff --git a/js/privatebin.js b/js/privatebin.js
index 77afc8b7..a06d80b0 100644
--- a/js/privatebin.js
+++ b/js/privatebin.js
@@ -5454,12 +5454,14 @@ jQuery.PrivateBin = (function($, RawDeflate) {
     const CopyToClipboard = (function () {
         const me = {};
 
-        let copyButton = $('#prettyMessageCopyBtn'),
-            copyLinkButton = $('#copyLink'),
-            copyIcon = $('#copyIcon'),
-            successIcon = $('#copySuccessIcon'),
-            shortcutHint = $('#copyShortcutHintText'),
-            url;
+        let copyButton,
+            copyLinkButton,
+            copyIcon,
+            successIcon,
+            shortcutHint,
+            url,
+            testMode,
+            testClipboard;
 
         /**
          * Handle copy to clipboard button click
@@ -5540,7 +5542,11 @@ jQuery.PrivateBin = (function($, RawDeflate) {
          * @function
          */
         function saveToClipboard(text) {
-            navigator.clipboard.writeText(text);
+            if (testMode) {
+                testClipboard = text;
+            } else {
+                navigator.clipboard.writeText(text);
+            }
         };
 
         /**
@@ -5606,6 +5612,35 @@ jQuery.PrivateBin = (function($, RawDeflate) {
             url = newUrl;
         };
 
+        /**
+         * Enable test mode, using for unit tests
+         * 
+         * @name CopyToClipboard.testMode
+         * @function
+         */
+        me.enableTestMode = function () {
+            testMode = true;
+        };
+
+        /**
+         * Read text from user's clipboard
+         * 
+         * @name CopyToClipboard.readFromClipboard
+         * @function
+         * @returns {string}
+         */
+        me.readFromClipboard = function () {
+            let clipboardData = "";
+
+            if (testMode) {
+                clipboardData = testClipboard;
+            } else {
+                clipboardData = navigator.clipboard.readText();
+            }
+
+            return clipboardData;
+        };
+
         /**
          * Initialize
          *
@@ -5613,6 +5648,12 @@ jQuery.PrivateBin = (function($, RawDeflate) {
          * @function
          */
         me.init = function() {
+            copyButton = $('#prettyMessageCopyBtn');
+            copyLinkButton = $('#copyLink');
+            copyIcon = $('#copyIcon');
+            successIcon = $('#copySuccessIcon');
+            shortcutHint = $('#copyShortcutHintText');
+
             handleCopyButtonClick();
             handleCopyLinkButtonClick();
             handleKeyboardShortcut();
diff --git a/js/test/CopyToClipboard.js b/js/test/CopyToClipboard.js
new file mode 100644
index 00000000..00ec7438
--- /dev/null
+++ b/js/test/CopyToClipboard.js
@@ -0,0 +1,123 @@
+'use strict';
+var common = require('../common');
+
+describe('CopyToClipboard', function() {
+    this.timeout(30000);
+
+    describe ('Copy paste co clipboard', function () {
+        jsc.property('Copy with button click', common.jscFormats(), 'nestring', function (format, text) {
+            var clean = jsdom();
+    
+            $('body').html(
+                '<div id="placeholder" class="hidden">+++ no paste text ' +
+                '+++</div><div id="prettymessage" class="hidden">' +
+                '<button type="button" id="prettyMessageCopyBtn"><svg id="copyIcon"></svg>' +
+                '<svg id="copySuccessIcon"></svg></button><pre ' +
+                'id="prettyprint" class="prettyprint linenums:1"></pre>' +
+                '</div><div id="plaintext" class="hidden"></div>'
+            );
+    
+            $.PrivateBin.PasteViewer.init();
+            $.PrivateBin.PasteViewer.setFormat(format);
+            $.PrivateBin.PasteViewer.setText(text);
+            $.PrivateBin.PasteViewer.run();
+    
+            $.PrivateBin.CopyToClipboard.init();
+            $.PrivateBin.CopyToClipboard.enableTestMode();
+            
+            $('#prettyMessageCopyBtn').trigger('click');
+            
+            const copiedText = $.PrivateBin.CopyToClipboard.readFromClipboard();
+    
+            clean();
+    
+            return text === copiedText;
+        });
+
+        /**
+         * Unfortunately in JSVerify impossible to check if copy with shortcut when user selected some text on the page
+         * (the copy paste to clipboard should not work in this case) due to lucking window.getSelection() in jsdom.
+         */
+        jsc.property('Copy with keyboard shortcut',  common.jscFormats(), 'nestring', function (format, text) {
+            var clean = jsdom();
+    
+            $('body').html(
+                '<div id="placeholder">+++ no paste text ' +
+                '+++</div><div id="prettymessage" class="hidden">' +
+                '<button type="button" id="prettyMessageCopyBtn"><svg id="copyIcon"></svg>' +
+                '<svg id="copySuccessIcon"></svg></button><pre ' +
+                'id="prettyprint" class="prettyprint linenums:1"></pre>' +
+                '</div><div id="plaintext" class="hidden"></div>'
+            );
+    
+            $.PrivateBin.PasteViewer.init();
+            $.PrivateBin.PasteViewer.setFormat(format);
+            $.PrivateBin.PasteViewer.setText(text);
+            $.PrivateBin.PasteViewer.run();
+    
+            $.PrivateBin.CopyToClipboard.init();
+            $.PrivateBin.CopyToClipboard.enableTestMode();
+
+            $('body').trigger('copy');
+
+            const copiedTextWithoutSelectedText = $.PrivateBin.CopyToClipboard.readFromClipboard();
+
+            clean();
+
+            return copiedTextWithoutSelectedText === text;
+        });
+    });
+
+
+    jsc.property('Copy link to clipboard', 'nestring', function (text) {
+        var clean = jsdom();
+
+        $('body').html('<button id="copyLink"></button>');
+
+        $.PrivateBin.CopyToClipboard.init();
+        $.PrivateBin.CopyToClipboard.enableTestMode();
+        $.PrivateBin.CopyToClipboard.setUrl(text);
+
+        $('#copyLink').trigger('click');
+
+        const copiedText = $.PrivateBin.CopyToClipboard.readFromClipboard();
+
+        clean();
+
+        return text === copiedText;
+    });
+
+
+    describe('Keyboard shortcut hint', function () {
+        jsc.property('Show hint', 'nestring', function (text) {
+            var clean = jsdom();
+    
+            $('body').html('<small id="copyShortcutHintText"></small>');
+    
+            $.PrivateBin.CopyToClipboard.init();
+            $.PrivateBin.CopyToClipboard.showKeyboardShortcutHint();
+    
+            const keyboardShortcutHint = $('#copyShortcutHintText').text();
+    
+            clean();
+    
+            return keyboardShortcutHint.length > 0;
+        });
+
+        jsc.property('Hide hint', 'nestring', function (text) {
+            var clean = jsdom();
+    
+            $('body').html('<small id="copyShortcutHintText">' + text + '</small>');
+    
+            $.PrivateBin.CopyToClipboard.init();
+            $.PrivateBin.CopyToClipboard.hideKeyboardShortcutHint();
+    
+            const keyboardShortcutHint = $('#copyShortcutHintText').text();
+    
+            clean();
+    
+            return keyboardShortcutHint.length === 0;
+        });
+    });
+
+});
\ No newline at end of file
diff --git a/lib/Configuration.php b/lib/Configuration.php
index e3a8069c..b09c6433 100644
--- a/lib/Configuration.php
+++ b/lib/Configuration.php
@@ -108,7 +108,7 @@ class Configuration
             'js/kjua-0.9.0.js'       => 'sha512-CVn7af+vTMBd9RjoS4QM5fpLFEOtBCoB0zPtaqIDC7sF4F8qgUSRFQQpIyEDGsr6yrjbuOLzdf20tkHHmpaqwQ==',
             'js/legacy.js'           => 'sha512-UxW/TOZKon83n6dk/09GsYKIyeO5LeBHokxyIq+r7KFS5KMBeIB/EM7NrkVYIezwZBaovnyNtY2d9tKFicRlXg==',
             'js/prettify.js'         => 'sha512-puO0Ogy++IoA2Pb9IjSxV1n4+kQkKXYAEUtVzfZpQepyDPyXk8hokiYDS7ybMogYlyyEIwMLpZqVhCkARQWLMg==',
-            'js/privatebin.js'       => 'sha512-/hDE31uyN+PB84PJ+C7fCFcdbfPy3TeV4slm6eSFrvqNhVMn/FPh/wsjyKLdQGW7fqBdxlGfq5+CDwUfF8fY0w==',
+            'js/privatebin.js'       => 'sha512-RbRvz3FPpNO23J/RQUvPfH118Yugz0nBSsqGnMlbr0rfTYR0G0/PIhJTymlR8P2p3sdmtd80m1fUrbdY7/gbEA==',
             'js/purify-3.2.3.js'     => 'sha512-m8Wa/I//YoYMiIahBxDDwYfTnycl+i2DwH58nR8ps1o4KWqXzF8k1K4qHDgAz2HSQFNCNNKH/Qcbfu/jLOuhuQ==',
             'js/rawinflate-0.3.js'   => 'sha512-g8uelGgJW9A/Z1tB6Izxab++oj5kdD7B4qC7DHwZkB6DGMXKyzx7v5mvap2HXueI2IIn08YlRYM56jwWdm2ucQ==',
             'js/showdown-2.1.0.js'   => 'sha512-WYXZgkTR0u/Y9SVIA4nTTOih0kXMEd8RRV6MLFdL6YU8ymhR528NLlYQt1nlJQbYz4EW+ZsS0fx1awhiQJme1Q==',