diff --git a/IM/SSH.py b/IM/SSH.py
index 966793fc..8090e5cd 100644
--- a/IM/SSH.py
+++ b/IM/SSH.py
@@ -118,8 +118,10 @@ def __init__(self, host, user, passwd=None, private_key=None, port=22, proxy_hos
             private_key_obj = StringIO()
             if os.path.isfile(private_key):
                 pkfile = open(private_key)
+                self.private_key = ""
                 for line in pkfile.readlines():
                     private_key_obj.write(line)
+                    self.private_key += line
                 pkfile.close()
             else:
                 # Avoid windows line endings
@@ -128,18 +130,31 @@ def __init__(self, host, user, passwd=None, private_key=None, port=22, proxy_hos
                 if not private_key.endswith("\n"):
                     private_key += "\n"
                 private_key_obj.write(private_key)
+                self.private_key = private_key
 
-            self.private_key = private_key
-            private_key_obj.seek(0)
+            self.private_key_obj = self._load_private_key(private_key_obj)
 
-            if "BEGIN RSA PRIVATE KEY" in private_key:
-                self.private_key_obj = paramiko.RSAKey.from_private_key(private_key_obj)
-            elif "BEGIN DSA PRIVATE KEY" in private_key:
-                self.private_key_obj = paramiko.DSSKey.from_private_key(private_key_obj)
-            elif "BEGIN EC PRIVATE KEY" in private_key:
-                self.private_key_obj = paramiko.ECDSAKey.from_private_key(private_key_obj)
-            elif "BEGIN OPENSSH PRIVATE KEY" in private_key:
-                self.private_key_obj = paramiko.Ed25519Key.from_private_key(private_key_obj)
+    @staticmethod
+    def _load_private_key(private_key_obj):
+        """ Load a private key from a file-like object"""
+        private_key_obj.seek(0)
+        try:
+            return paramiko.RSAKey.from_private_key(private_key_obj)
+        except Exception:
+            private_key_obj.seek(0)
+        try:
+            return paramiko.DSSKey.from_private_key(private_key_obj)
+        except Exception:
+            private_key_obj.seek(0)
+        try:
+            return paramiko.ECDSAKey.from_private_key(private_key_obj)
+        except Exception:
+            private_key_obj.seek(0)
+        try:
+            return paramiko.Ed25519Key.from_private_key(private_key_obj)
+        except Exception:
+            private_key_obj.seek(0)
+        raise Exception("Invalid private key")
 
     def __del__(self):
         self.close()
diff --git a/contextualization/ctxt_agent_dist.py b/contextualization/ctxt_agent_dist.py
index af981185..f96a8a01 100755
--- a/contextualization/ctxt_agent_dist.py
+++ b/contextualization/ctxt_agent_dist.py
@@ -211,7 +211,7 @@ def get_master_ssh(self, general_conf_data):
         return SSHRetry(vm_ip, ctxt_vm['user'], passwd, private_key, ctxt_vm['remote_port'])
 
     @staticmethod
-    def get_ssh(vm, pk_file, changed_pass=None):
+    def get_ssh(vm, pk_file, changed_pass=None, use_proxy=False):
         passwd = vm['passwd']
         if 'new_passwd' in vm and vm['new_passwd'] and changed_pass:
             passwd = vm['new_passwd']
diff --git a/test/integration/TestIM.py b/test/integration/TestIM.py
index 1b937d36..94728e5c 100755
--- a/test/integration/TestIM.py
+++ b/test/integration/TestIM.py
@@ -261,7 +261,7 @@ def test_19_addresource(self):
         Test AddResource function
         """
         (success, res) = self.server.AddResource(
-            self.inf_id, RADL_ADD_WIN, self.auth_data)
+            self.inf_id, RADL_ADD, self.auth_data)
         self.assertTrue(success, msg="ERROR calling AddResource: " + str(res))
 
         (success, vm_ids) = self.server.GetInfrastructureInfo(
@@ -272,7 +272,7 @@ def test_19_addresource(self):
                                               str(len(vm_ids)) + "). It must be 4"))
 
         all_configured = self.wait_inf_state(
-            self.inf_id, VirtualMachine.CONFIGURED, 2700)
+            self.inf_id, VirtualMachine.CONFIGURED, 2400)
         self.assertTrue(
             all_configured, msg="ERROR waiting the infrastructure to be configured (timeout).")