diff --git a/js/test/CryptTool.js b/js/test/CryptTool.js
index 7c55692f..1c25af3b 100644
--- a/js/test/CryptTool.js
+++ b/js/test/CryptTool.js
@@ -31,14 +31,14 @@ describe('CryptTool', function () {
         // SJCL based pastes still works
         it(
             'supports PrivateBin v1 ciphertext (SJCL & browser atob)',
-            async function () {
+            function () {
                 delete global.Base64;
                 var clean = jsdom();
                 window.crypto = new WebCrypto();
 
                 // Of course you can easily decipher the following texts, if you like.
                 // Bonus points for finding their sources and hidden meanings.
-                var paste1 = await $.PrivateBin.CryptTool.decipher(
+                return $.PrivateBin.CryptTool.decipher(
                     '6t2qsmLyfXIokNCL+3/yl15rfTUBQvm5SOnFPvNE7Q8=',
                     // -- "That's amazing. I've got the same combination on my luggage."
                     Array.apply(0, Array(6)).map(function(_,b) { return b + 1; }).join(''),
@@ -69,52 +69,53 @@ describe('CryptTool', function () {
                     'QUxMXI5htsn2rf0HxCFu7Po8DNYLxTS+67hYjDIYWYaEIc8LXWMLyDm9' +
                     'C5fARPJ4F2BIWgzgzkNj+dVjusft2XnziamWdbS5u3kuRlVuz5LQj+R5' +
                     'imnqQAincdZTkTT1nYx+DatlOLllCYIHffpI="}'
-                ),
-                paste2 = await $.PrivateBin.CryptTool.decipher(
-                    's9pmKZKOBN7EVvHpTA8jjLFH3Xlz/0l8lB4+ONPACrM=',
-                    '', // no password
-                    '{"iv":"WA42mdxIVXUwBqZu7JYNiw==","v":1,"iter":10000,"ks"' +
-                    ':256,"ts":128,"mode":"gcm","adata":"","cipher":"aes","sa' +
-                    'lt":"jN6CjbQMJCM=","ct":"kYYMo5DFG1+w0UHiYXT5pdV0IUuXxzO' +
-                    'lslkW/c3DRCbGFROCVkAskHce7HoRczee1N9c5MhHjVMJUIZE02qIS8U' +
-                    'yHdJ/GqcPVidTUcj9rnDNWsTXkjVv8jCwHS/cwmAjDTWpwp5ThECN+ov' +
-                    '/wNp/NdtTj8Qj7f/T3rfZIOCWfwLH9s4Des35UNcUidfPTNQ1l0Gm0X+' +
-                    'r98CCUSYZjQxkZc6hRZBLPQ8EaNVooUwd5eP4GiYlmSDNA0wOSA+5isP' +
-                    'YxomVCt+kFf58VBlNhpfNi7BLYAUTPpXT4SfH5drR9+C7NTeZ+tTCYjb' +
-                    'U94PzYItOpu8vgnB1/a6BAM5h3m9w+giUb0df4hgTWeZnZxLjo5BN8WV' +
-                    '+kdTXMj3/Vv0gw0DQrDcCuX/cBAjpy3lQGwlAN1vXoOIyZJUjMpQRrOL' +
-                    'dKvLB+zcmVNtGDbgnfP2IYBzk9NtodpUa27ne0T0ZpwOPlVwevsIVZO2' +
-                    '24WLa+iQmmHOWDFFpVDlS0t0fLfOk7Hcb2xFsTxiCIiyKMho/IME1Du3' +
-                    'X4e6BVa3hobSSZv0rRtNgY1KcyYPrUPW2fxZ+oik3y9SgGvb7XpjVIta' +
-                    '8DWlDWRfZ9kzoweWEYqz9IA8Xd373RefpyuWI25zlHoX3nwljzsZU6dC' +
-                    '//h/Dt2DNr+IAvKO3+u23cWoB9kgcZJ2FJuqjLvVfCF+OWcig7zs2pTY' +
-                    'JW6Rg6lqbBCxiUUlae6xJrjfv0pzD2VYCLY7v1bVTagppwKzNI3WaluC' +
-                    'OrdDYUCxUSe56yd1oAoLPRVbYvomRboUO6cjQhEknERyvt45og2kORJO' +
-                    'EJayHW+jZgR0Y0jM3Nk17ubpij2gHxNx9kiLDOiCGSV5mn9mV7qd3HHc' +
-                    'OMSykiBgbyzjobi96LT2dIGLeDXTIdPOog8wyobO4jWq0GGs0vBB8oSY' +
-                    'XhHvixZLcSjX2KQuHmEoWzmJcr3DavdoXZmAurGWLKjzEdJc5dSD/eNr' +
-                    '99gjHX7wphJ6umKMM+fn6PcbYJkhDh2GlJL5COXjXfm/5aj/vuyaRRWZ' +
-                    'MZtmnYpGAtAPg7AUG"}'
-                );
-                clean();
-
-                assert.ok(
-                    paste1.includes('securely packed in iron') &&
-                    paste2.includes('Sol is right')
-                );
+                ).then(function(paste1) {
+                    return $.PrivateBin.CryptTool.decipher(
+                        's9pmKZKOBN7EVvHpTA8jjLFH3Xlz/0l8lB4+ONPACrM=',
+                        '', // no password
+                        '{"iv":"WA42mdxIVXUwBqZu7JYNiw==","v":1,"iter":10000,"ks"' +
+                        ':256,"ts":128,"mode":"gcm","adata":"","cipher":"aes","sa' +
+                        'lt":"jN6CjbQMJCM=","ct":"kYYMo5DFG1+w0UHiYXT5pdV0IUuXxzO' +
+                        'lslkW/c3DRCbGFROCVkAskHce7HoRczee1N9c5MhHjVMJUIZE02qIS8U' +
+                        'yHdJ/GqcPVidTUcj9rnDNWsTXkjVv8jCwHS/cwmAjDTWpwp5ThECN+ov' +
+                        '/wNp/NdtTj8Qj7f/T3rfZIOCWfwLH9s4Des35UNcUidfPTNQ1l0Gm0X+' +
+                        'r98CCUSYZjQxkZc6hRZBLPQ8EaNVooUwd5eP4GiYlmSDNA0wOSA+5isP' +
+                        'YxomVCt+kFf58VBlNhpfNi7BLYAUTPpXT4SfH5drR9+C7NTeZ+tTCYjb' +
+                        'U94PzYItOpu8vgnB1/a6BAM5h3m9w+giUb0df4hgTWeZnZxLjo5BN8WV' +
+                        '+kdTXMj3/Vv0gw0DQrDcCuX/cBAjpy3lQGwlAN1vXoOIyZJUjMpQRrOL' +
+                        'dKvLB+zcmVNtGDbgnfP2IYBzk9NtodpUa27ne0T0ZpwOPlVwevsIVZO2' +
+                        '24WLa+iQmmHOWDFFpVDlS0t0fLfOk7Hcb2xFsTxiCIiyKMho/IME1Du3' +
+                        'X4e6BVa3hobSSZv0rRtNgY1KcyYPrUPW2fxZ+oik3y9SgGvb7XpjVIta' +
+                        '8DWlDWRfZ9kzoweWEYqz9IA8Xd373RefpyuWI25zlHoX3nwljzsZU6dC' +
+                        '//h/Dt2DNr+IAvKO3+u23cWoB9kgcZJ2FJuqjLvVfCF+OWcig7zs2pTY' +
+                        'JW6Rg6lqbBCxiUUlae6xJrjfv0pzD2VYCLY7v1bVTagppwKzNI3WaluC' +
+                        'OrdDYUCxUSe56yd1oAoLPRVbYvomRboUO6cjQhEknERyvt45og2kORJO' +
+                        'EJayHW+jZgR0Y0jM3Nk17ubpij2gHxNx9kiLDOiCGSV5mn9mV7qd3HHc' +
+                        'OMSykiBgbyzjobi96LT2dIGLeDXTIdPOog8wyobO4jWq0GGs0vBB8oSY' +
+                        'XhHvixZLcSjX2KQuHmEoWzmJcr3DavdoXZmAurGWLKjzEdJc5dSD/eNr' +
+                        '99gjHX7wphJ6umKMM+fn6PcbYJkhDh2GlJL5COXjXfm/5aj/vuyaRRWZ' +
+                        'MZtmnYpGAtAPg7AUG"}'
+                    ).then(function(paste2) {
+                        clean();
+                        assert.ok(
+                            paste1.includes('securely packed in iron') &&
+                            paste2.includes('Sol is right')
+                        );
+                    });
+                });
             }
         );
 
         it(
             'supports ZeroBin ciphertext (SJCL & Base64 1.7)',
-            async function () {
+            function () {
                 global.Base64 = require('../base64-1.7').Base64;
                 var clean = jsdom();
                 window.crypto = new WebCrypto();
 
                 // Of course you can easily decipher the following texts, if you like.
                 // Bonus points for finding their sources and hidden meanings.
-                var paste1 = await $.PrivateBin.CryptTool.decipher(
+                return $.PrivateBin.CryptTool.decipher(
                     '6t2qsmLyfXIokNCL+3/yl15rfTUBQvm5SOnFPvNE7Q8=',
                     // -- "That's amazing. I've got the same combination on my luggage."
                     Array.apply(0, Array(6)).map(function(_,b) { return b + 1; }).join(''),
@@ -137,33 +138,34 @@ describe('CryptTool', function () {
                     '7mNNo7xba/YT9KoPDaniqnYqb+q2pX1WNWE7dLS2wfroMAS3kh8P22DA' +
                     'V37AeiNoD2PcI6ZcHbRdPa+XRrRcJhSPPW7UQ0z4OvBfjdu/w390QxAx' +
                     'SxvZewoh49fKKB6hTsRnZb4tpHkjlww=="}'
-                ),
-                paste2 = await $.PrivateBin.CryptTool.decipher(
-                    's9pmKZKOBN7EVvHpTA8jjLFH3Xlz/0l8lB4+ONPACrM=',
-                    '', // no password
-                    '{"iv":"Z7lAZQbkrqGMvruxoSm6Pw==","v":1,"iter":10000,"ks"' +
-                    ':256,"ts":128,"mode":"gcm","adata":"","cipher":"aes","sa' +
-                    'lt":"jN6CjbQMJCM=","ct":"PuOPWB3i2FPcreSrLYeQf84LdE8RHjs' +
-                    'c+MGtiOr4b7doNyWKYtkNorbRadxaPnEee2/Utrp1MIIfY5juJSy8RGw' +
-                    'EPX5ciWcYe6EzsXWznsnvhmpKNj9B7eIIrfSbxfy8E2e/g7xav1nive+' +
-                    'ljToka3WT1DZ8ILQd/NbnJeHWaoSEOfvz8+d8QJPb1tNZvs7zEY95Dum' +
-                    'QwbyOsIMKAvcZHJ9OJNpujXzdMyt6DpcFcqlldWBZ/8q5rAUTw0HNx/r' +
-                    'CgbhAxRYfNoTLIcMM4L0cXbPSgCjwf5FuO3EdE13mgEDhcClW79m0Qvc' +
-                    'nIh8xgzYoxLbp0+AwvC/MbZM8savN/0ieWr2EKkZ04ggiOIEyvfCUuNp' +
-                    'rQBYO+y8kKduNEN6by0Yf4LRCPfmwN+GezDLuzTnZIMhPbGqUAdgV6Ex' +
-                    'qK2ULEEIrQEMoOuQIxfoMhqLlzG79vXGt2O+BY+4IiYfvmuRLks4UXfy' +
-                    'HqxPXTJg48IYbGs0j4TtJPUgp3523EyYLwEGyVTAuWhYAmVIwd/hoV7d' +
-                    '7tmfcF73w9dufDFI3LNca2KxzBnWNPYvIZKBwWbq8ncxkb191dP6mjEi' +
-                    '7NnhqVk5A6vIBbu4AC5PZf76l6yep4xsoy/QtdDxCMocCXeAML9MQ9uP' +
-                    'QbuspOKrBvMfN5igA1kBqasnxI472KBNXsdZnaDddSVUuvhTcETM="}'
-                );
-                clean();
-
-                delete global.Base64;
-                assert.ok(
-                    paste1.includes('securely packed in iron') &&
-                    paste2.includes('Sol is right')
-                );
+                ).then(function(paste1) {
+                    return $.PrivateBin.CryptTool.decipher(
+                        's9pmKZKOBN7EVvHpTA8jjLFH3Xlz/0l8lB4+ONPACrM=',
+                        '', // no password
+                        '{"iv":"Z7lAZQbkrqGMvruxoSm6Pw==","v":1,"iter":10000,"ks"' +
+                        ':256,"ts":128,"mode":"gcm","adata":"","cipher":"aes","sa' +
+                        'lt":"jN6CjbQMJCM=","ct":"PuOPWB3i2FPcreSrLYeQf84LdE8RHjs' +
+                        'c+MGtiOr4b7doNyWKYtkNorbRadxaPnEee2/Utrp1MIIfY5juJSy8RGw' +
+                        'EPX5ciWcYe6EzsXWznsnvhmpKNj9B7eIIrfSbxfy8E2e/g7xav1nive+' +
+                        'ljToka3WT1DZ8ILQd/NbnJeHWaoSEOfvz8+d8QJPb1tNZvs7zEY95Dum' +
+                        'QwbyOsIMKAvcZHJ9OJNpujXzdMyt6DpcFcqlldWBZ/8q5rAUTw0HNx/r' +
+                        'CgbhAxRYfNoTLIcMM4L0cXbPSgCjwf5FuO3EdE13mgEDhcClW79m0Qvc' +
+                        'nIh8xgzYoxLbp0+AwvC/MbZM8savN/0ieWr2EKkZ04ggiOIEyvfCUuNp' +
+                        'rQBYO+y8kKduNEN6by0Yf4LRCPfmwN+GezDLuzTnZIMhPbGqUAdgV6Ex' +
+                        'qK2ULEEIrQEMoOuQIxfoMhqLlzG79vXGt2O+BY+4IiYfvmuRLks4UXfy' +
+                        'HqxPXTJg48IYbGs0j4TtJPUgp3523EyYLwEGyVTAuWhYAmVIwd/hoV7d' +
+                        '7tmfcF73w9dufDFI3LNca2KxzBnWNPYvIZKBwWbq8ncxkb191dP6mjEi' +
+                        '7NnhqVk5A6vIBbu4AC5PZf76l6yep4xsoy/QtdDxCMocCXeAML9MQ9uP' +
+                        'QbuspOKrBvMfN5igA1kBqasnxI472KBNXsdZnaDddSVUuvhTcETM="}'
+                    ).then(function(paste2) {
+                        clean();
+                        delete global.Base64;
+                        assert.ok(
+                            paste1.includes('securely packed in iron') &&
+                            paste2.includes('Sol is right')
+                        );
+                    });
+                });
             }
         );
     });