diff --git a/warden3/warden_server/warden_server.py b/warden3/warden_server/warden_server.py
index e20d2d7adb59ab111296e5b2a7f9fdfea80cd9e2..3446bfe6c3e042c5d4850e19008a85d9e73fd99d 100755
--- a/warden3/warden_server/warden_server.py
+++ b/warden3/warden_server/warden_server.py
@@ -47,7 +47,7 @@ class Error(Exception):
     def get_http_err_msg(self):
         try:
             err = self.errors[0]["error"]
-            msg = self.errors[0]["message"]
+            msg = self.errors[0]["message"].replace("\n", " ")
         except (IndexError, KeyError):
             err = 500
             msg = "There's NO self-destruction button! Ah, you've just found it..."
@@ -57,7 +57,7 @@ class Error(Exception):
                 # errors not same, round to basic err code (400, 500)
                 # and use the highest one
                 err = max(err//100, next_err//100)*100
-            next_msg = e.get("message", "Unknown error")
+            next_msg = e.get("message", "Unknown error").replace("\n", " ")
             if msg != next_msg:
                 msg = "Multiple errors"
         return err, msg
@@ -430,11 +430,14 @@ class JSONSchemaValidator(NoValidator):
 
         res = []
         for error in sorted(self.validator.iter_errors(event), key=sortkey):
-            res.append({"error": 460,
-                "message": "Validation error: key \"%s\", value \"%s\", expected - %s" % (
+            res.append({
+                "error": 460,
+                "message": "Validation error: key \"%s\", value \"%s\"" % (
                     "/".join(str(v) for v in error.path),
-                    error.instance,
-                    error.schema.get('description', 'no additional info'))})
+                    error.instance
+                ),
+                "expected": error.schema.get('description', 'no additional info')
+            })
 
         return res