diff --git a/lib/Common.js b/lib/Common.js
index a6f341f8..fdf7d5ee 100644
--- a/lib/Common.js
+++ b/lib/Common.js
@@ -534,17 +534,18 @@ Common.mergeEnvironmentVariables = function(app_env, env_name, deploy_conf) {
     env : {}
   }
 
+  // Stringify possible object
+  for (var key in app.env) {
+    if (typeof app.env[key] == 'object') {
+      app.env[key] = JSON.stringify(app.env[key]);
+    }
+  }
+
   /**
    * Extra configuration update
    */
   util._extend(new_conf, app)
 
-  for (var key in app.env) {
-    if (typeof app.env[key] == 'object') {
-      new_conf[key] = JSON.stringify(app.env[key]);
-    }
-  }
-
   if (env_name) {
     // First merge variables from deploy.production.env object as least priority.
     if (deploy_conf && deploy_conf[env_name] && deploy_conf[env_name]['env']) {
diff --git a/test/programmatic/fixtures/json-env-passing/echo.js b/test/programmatic/fixtures/json-env-passing/echo.js
new file mode 100644
index 00000000..9f2b21e0
--- /dev/null
+++ b/test/programmatic/fixtures/json-env-passing/echo.js
@@ -0,0 +1,4 @@
+
+setInterval(function() {
+  console.log(process.env.JSONTEST);
+}, 50);
diff --git a/test/programmatic/fixtures/json-env-passing/ecosystem.config.js b/test/programmatic/fixtures/json-env-passing/ecosystem.config.js
new file mode 100644
index 00000000..ad289462
--- /dev/null
+++ b/test/programmatic/fixtures/json-env-passing/ecosystem.config.js
@@ -0,0 +1,22 @@
+module.exports = {
+  apps : [{
+    script: 'echo.js',
+    env: {
+      JSONTEST: { si: 'si' }
+    },
+    env_production: {
+      NODE_ENV: 'production'
+    }
+  }],
+
+  deploy : {
+    production : {
+      user : 'node',
+      host : '212.83.163.1',
+      ref  : 'origin/master',
+      repo : 'git@github.com:repo.git',
+      path : '/var/www/production',
+      'post-deploy' : 'npm install && pm2 reload ecosystem.config.js --env production'
+    }
+  }
+};
diff --git a/test/programmatic/issues/json_env_passing_4080.mocha.js b/test/programmatic/issues/json_env_passing_4080.mocha.js
new file mode 100644
index 00000000..f81d258d
--- /dev/null
+++ b/test/programmatic/issues/json_env_passing_4080.mocha.js
@@ -0,0 +1,48 @@
+var PM2    = require('../../..');
+var should = require('should');
+
+describe('Programmatic log feature test', function() {
+  var proc1 = null;
+  var procs = [];
+
+  var pm2 = new PM2.custom({
+    cwd : __dirname + '/../fixtures/json-env-passing'
+  });
+
+  before(function(done) {
+    pm2.delete('all', function() {
+      done();
+    });
+  });
+
+  after(function(done) {
+    pm2.delete('all', function() {
+      pm2.disconnect(done);
+    });
+  });
+
+  it('should start a process with object as environment variable', function(done) {
+    pm2.start({
+      script: 'echo.js',
+      env: {
+        NORMAL: 'STR',
+        JSONTEST: { si: 'si' }
+      },
+      env_production: {
+        NODE_ENV: 'production'
+      }
+    }, function(err, procs) {
+      should(err).be.null()
+      should(procs.length).eql(1)
+      done()
+    })
+  })
+
+  it('should retrieve environment variable stringified', function(done) {
+    pm2.list((err, procs) => {
+      should(procs[0].pm2_env.JSONTEST).eql('{"si":"si"}')
+      should(procs[0].pm2_env.NORMAL).eql('STR')
+      done()
+    })
+  })
+})
diff --git a/test/unit.sh b/test/unit.sh
index e7c6fad9..7b7e55a2 100644
--- a/test/unit.sh
+++ b/test/unit.sh
@@ -10,8 +10,9 @@ function reset {
 }
 
 function runUnitTest {
+    echo "[~] Starting test $1"
     START=$(date +%s)
-    mocha --exit --opts ./mocha.opts $1
+    mocha --exit --bail --opts ./mocha.opts $1
     RET=$?
 
     if [ $RET -ne 0 ];
@@ -21,12 +22,12 @@ function runUnitTest {
         echo $STR >> unit_time
 
         reset
-        mocha --exit --opts ./mocha.opts $1
+        mocha --bail --exit --opts ./mocha.opts $1
         RET=$?
 
         if [ $RET -ne 0 ];
         then
-            echo -e "######## \033[31m  ✘ $1\033[0m"
+            echo -e "######## TEST ✘ $1 FAILED TWICE!!"
             exit 1
         fi
     fi
@@ -49,7 +50,7 @@ cd test/programmatic
 
 
 # Abort script at first error
-set -e
+# set -e
 
 runUnitTest ./programmatic.js
 runUnitTest ./instances.mocha.js
@@ -80,6 +81,8 @@ runUnitTest ./configuration.mocha.js
 runUnitTest ./id.mocha.js
 runUnitTest ./god.mocha.js
 
+runUnitTest ./issues/json_env_passing_4080.mocha.js
+
 cd ../interface
 
 runUnitTest ./bus.spec.mocha.js