diff --git a/package.json b/package.json
index 791de96a81..3fcd8992cf 100644
--- a/package.json
+++ b/package.json
@@ -182,6 +182,7 @@
     "nightwatch_local_publishContract": "nightwatch ./test-browser/tests/publishContract.js --config nightwatch.js --env chrome ",
     "nightwatch_local_generalSettings": "nightwatch ./test-browser/tests/generalSettings.js --config nightwatch.js --env chrome ",
     "nightwatch_local_fileExplorer": "nightwatch ./test-browser/tests/fileExplorer.js --config nightwatch.js --env chrome ",
+    "nightwatch_local_debugger": "nightwatch ./test-browser/tests/debugger.js --config nightwatch.js --env chrome ",
     "onchange": "onchange build/app.js -- npm-run-all lint",
     "prepublish": "mkdirp build; npm-run-all -ls downloadsolc_root build",
     "remixd": "remixd -s ./contracts --remix-ide http://127.0.0.1:8080",
diff --git a/src/app/ui/multiParamManager.js b/src/app/ui/multiParamManager.js
index bf6795674a..1f5211bc86 100644
--- a/src/app/ui/multiParamManager.js
+++ b/src/app/ui/multiParamManager.js
@@ -116,14 +116,14 @@ class MultiParamManager {
       title = this.funABI.type === 'receive' ? '(receive)' : '(fallback)'
     }
 
-    this.basicInputField = yo`<input class="form-control"></input>`
+    this.basicInputField = yo`<input class="form-control" data-shared="multiParamManagerBasicInputField"></input>`
     this.basicInputField.setAttribute('placeholder', this.inputs)
     this.basicInputField.setAttribute('title', this.inputs)
 
     var onClick = () => {
       this.clickCallBack(this.funABI.inputs, this.basicInputField.value)
     }
-    let funcButton = yo`<button onclick=${() => onClick()} class="${css.instanceButton} btn btn-sm">${title}</button>`
+    let funcButton = yo`<button onclick=${() => onClick()} data-shared="multiParamManagerFuncButton" class="${css.instanceButton} btn btn-sm">${title}</button>`
     this.contractActionsContainerSingle = yo`
     <div class="${css.contractActionsContainerSingle} pt-2">
       ${funcButton}
@@ -142,7 +142,7 @@ class MultiParamManager {
       }
     }
 
-    var expandedButton = yo`<button onclick=${() => { multiOnClick() }} class="${css.instanceButton}"></button>`
+    var expandedButton = yo`<button onclick=${() => { multiOnClick() }} class="${css.instanceButton}" data-shared="multiParamManagerExpandedButton"></button>`
 
     this.contractActionsContainerMulti = yo`<div class="${css.contractActionsContainerMulti}" >
       <div class="${css.contractActionsContainerMultiInner} text-dark" >
diff --git a/src/app/ui/txLogger.js b/src/app/ui/txLogger.js
index 2301ccbc06..4ab75bdc34 100644
--- a/src/app/ui/txLogger.js
+++ b/src/app/ui/txLogger.js
@@ -215,7 +215,7 @@ function renderKnownTransaction (self, data, blockchain) {
         ${checkTxStatus(data.receipt, txType)}
         ${context(self, {from, to, data}, blockchain)}
         <div class=${css.buttons}>
-          <button class="${css.debug} btn btn-primary btn-sm" onclick=${(e) => debug(e, data, self)}>Debug</div>
+          <button data-shared="txLoggerDebugButton" class="${css.debug} btn btn-primary btn-sm" onclick=${(e) => debug(e, data, self)}>Debug</div>
         </div>
         <i class="${css.arrow} fas fa-angle-down"></i>
       </div>
diff --git a/src/app/ui/universal-dapp-ui.js b/src/app/ui/universal-dapp-ui.js
index 59381cbd23..975a6a46fd 100644
--- a/src/app/ui/universal-dapp-ui.js
+++ b/src/app/ui/universal-dapp-ui.js
@@ -60,7 +60,7 @@ UniversalDAppUI.prototype.renderInstanceFromABI = function (contractABI, address
   var shortAddress = helper.shortenAddress(address)
   var title = yo`
     <div class="${css.title} alert alert-secondary">
-      <button class="btn ${css.titleExpander}" onclick="${(e) => { toggleClass(e) }}">
+      <button data-id="universalDappUiTitleExpander" class="btn ${css.titleExpander}" onclick="${(e) => { toggleClass(e) }}">
         <i class="fas fa-angle-right" aria-hidden="true"></i>
       </button>
       <div class="input-group ${css.nameNbuts}">
diff --git a/test-browser/tests/debugger.js b/test-browser/tests/debugger.js
new file mode 100644
index 0000000000..e09fb36aee
--- /dev/null
+++ b/test-browser/tests/debugger.js
@@ -0,0 +1,73 @@
+'use strict'
+var init = require('../helpers/init')
+var sauce = require('./sauce')
+
+module.exports = {
+
+  before: function (browser, done) {
+    init(browser, done)
+  },
+
+  '@sources': function () {
+    return sources
+  },
+
+  'Should launch debugger': function (browser) {
+    browser.addFile('blah.sol', sources[0]['browser/blah.sol'])
+    .clickLaunchIcon('udapp')
+    .waitForElementPresent('*[title="Deploy - transact (not payable)"]')
+    .click('*[title="Deploy - transact (not payable)"]')
+    .waitForElementPresent('*[data-shared="txLoggerDebugButton"]:nth-of-type(1)')
+    .click('*[data-shared="txLoggerDebugButton"]:nth-of-type(1)')
+    .assert.containsText('*[data-id="sidePanelSwapitTitle"]', 'DEBUGGER')
+  },
+
+  'Should debug failing transaction': function (browser) {
+    browser.waitForElementVisible('*[data-id="verticalIconsKindudapp"]')
+    .clickLaunchIcon('udapp')
+    .waitForElementPresent('*[data-id="universalDappUiTitleExpander"]')
+    .click('*[data-id="universalDappUiTitleExpander"]')
+    .waitForElementPresent('*[data-shared="multiParamManagerBasicInputField"]:nth-of-type(1)')
+    .sendKeys('*[data-shared="multiParamManagerBasicInputField"]:nth-of-type(1)', '"toast", 999')
+    .pause(100000)
+    .end()
+  },
+
+  tearDown: sauce
+}
+
+var sources = [
+  {
+    'browser/blah.sol': {
+        content: `
+    pragma solidity >=0.4.22 <0.6.0;
+
+    contract Kickstarter {
+
+        enum State { Started, Completed }
+
+        struct Project {
+            address owner;
+            string name;
+            uint goal;
+            State state;
+        }    
+
+        Project[] public projects;    
+
+        constructor() public {
+
+        }    
+
+        function createProject(string memory name, uint goal) public {
+            Project storage project = projects[projects.length];
+            project.name = name;
+            project.owner = msg.sender;
+            project.state = State.Started;
+            project.goal = goal;
+        }
+    }
+        `
+    }
+  }
+]