diff --git a/remix-solidity/src/compiler/compiler.js b/remix-solidity/src/compiler/compiler.js
index dcf9e95d7d..407c1bdb3e 100644
--- a/remix-solidity/src/compiler/compiler.js
+++ b/remix-solidity/src/compiler/compiler.js
@@ -73,7 +73,7 @@ function Compiler (handleImportCall) {
   function onInternalCompilerLoaded () {
     if (worker === null) {
       var compiler
-      var userAgent = (typeof (navigator) != 'undefined') && navigator.userAgent ? navigator.userAgent.toLowerCase() : "-"
+      var userAgent = (typeof (navigator) !== 'undefined') && navigator.userAgent ? navigator.userAgent.toLowerCase() : '-'
       if (typeof (window) === 'undefined' || userAgent.indexOf(' electron/') > -1) {
         compiler = require('solc')
       } else {
diff --git a/remix-tests/src/compiler.js b/remix-tests/src/compiler.js
index 6ffbff1633..f43a9cab65 100644
--- a/remix-tests/src/compiler.js
+++ b/remix-tests/src/compiler.js
@@ -2,7 +2,6 @@
 let fs = require('fs')
 var async = require('async')
 var path = require('path')
-const signale = require('signale')
 let RemixCompiler = require('remix-solidity').Compiler
 
 String.prototype.regexIndexOf = function (regex, startpos) {
@@ -10,6 +9,9 @@ String.prototype.regexIndexOf = function (regex, startpos) {
   return (indexOf >= 0) ? (indexOf + (startpos || 0)) : indexOf
 }
 
+var userAgent = (typeof (navigator) !== 'undefined') && navigator.userAgent ? navigator.userAgent.toLowerCase() : '-'
+var isBrowser = !(typeof (window) === 'undefined' || userAgent.indexOf(' electron/') > -1)
+
 // TODO: replace this with remix's own compiler code
 function compileFileOrFiles (filename, isDirectory, cb) {
   let compiler, filepath
@@ -52,7 +54,7 @@ function compileFileOrFiles (filename, isDirectory, cb) {
   ], function (err, result) {
     let errors = (result.errors || []).filter((e) => e.type === 'Error' || e.severity === 'error')
     if (errors.length > 0) {
-      signale.fatal(errors)
+      if (!isBrowser) require('signale').fatal(errors)
       return cb(new Error('errors compiling'))
     }
     cb(err, result.contracts)
@@ -91,7 +93,7 @@ function compileContractSources (sources, importFileCb, cb) {
   ], function (err, result) {
     let errors = (result.errors || []).filter((e) => e.type === 'Error' || e.severity === 'error')
     if (errors.length > 0) {
-      signale.fatal(errors)
+      if (!isBrowser) require('signale').fatal(errors)
       return cb(new Error('errors compiling'))
     }
     cb(err, result.contracts)
diff --git a/remix-tests/src/index.js b/remix-tests/src/index.js
index 0bd322382d..3dfd689ff4 100644
--- a/remix-tests/src/index.js
+++ b/remix-tests/src/index.js
@@ -1,7 +1,6 @@
 const async = require('async')
 const path = require('path')
 const fs = require('fs')
-const { Signale } = require('signale')
 require('colors')
 
 let Compiler = require('./compiler.js')
@@ -17,28 +16,6 @@ var createWeb3Provider = function () {
   return web3
 }
 
-// signale configuration
-const options = {
-  types: {
-    result: {
-      badge: '\t✓',
-      label: '',
-      color: 'greenBright'
-    },
-    name: {
-      badge: '\n\t◼',
-      label: '',
-      color: 'white'
-    },
-    error: {
-      badge: '\t✘',
-      label: '',
-      color: 'redBright'
-    }
-  }
-}
-const signale = new Signale(options)
-
 var runTestSources = function (contractSources, testCallback, resultCallback, finalCallback, importFileCb) {
   async.waterfall([
     function compile (next) {
@@ -119,6 +96,28 @@ var runTestSources = function (contractSources, testCallback, resultCallback, fi
 }
 
 var runTestFiles = function (filepath, isDirectory, web3) {
+  const { Signale } = require('signale')
+  // signale configuration
+  const options = {
+    types: {
+      result: {
+        badge: '\t✓',
+        label: '',
+        color: 'greenBright'
+      },
+      name: {
+        badge: '\n\t◼',
+        label: '',
+        color: 'white'
+      },
+      error: {
+        badge: '\t✘',
+        label: '',
+        color: 'redBright'
+      }
+    }
+  }
+  const signale = new Signale(options)
   async.waterfall([
     function compile (next) {
       Compiler.compileFileOrFiles(filepath, isDirectory, next)