diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c
index c29f2f2b1..e12632656 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c
@@ -1195,7 +1195,7 @@ ecma_builtin_array_prototype_object_sort (ecma_value_t this_arg, /**< this argum
   /* Check if the provided compare function is callable. */
   if (!ecma_is_value_undefined (arg1) && !ecma_op_is_callable (arg1))
   {
-    return ecma_raise_type_error (ECMA_ERR_MSG (""));
+    return ecma_raise_type_error (ECMA_ERR_MSG ("Compare function is not callable."));
   }
 
   ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
@@ -1992,7 +1992,7 @@ ecma_builtin_array_prototype_object_every (ecma_value_t this_arg, /**< this argu
   /* 4. */
   if (!ecma_op_is_callable (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Callback function is not callable."));
   }
   else
   {
@@ -2091,7 +2091,7 @@ ecma_builtin_array_prototype_object_some (ecma_value_t this_arg, /**< this argum
   /* 4. */
   if (!ecma_op_is_callable (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Callback function is not callable."));
   }
   else
   {
@@ -2190,7 +2190,7 @@ ecma_builtin_array_prototype_object_for_each (ecma_value_t this_arg, /**< this a
   /* 4. */
   if (!ecma_op_is_callable (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Callback function is not callable."));
   }
   else
   {
@@ -2283,7 +2283,7 @@ ecma_builtin_array_prototype_object_map (ecma_value_t this_arg, /**< this argume
   /* 4. */
   if (!ecma_op_is_callable (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Callback function is not callable."));
   }
   else
   {
@@ -2395,7 +2395,7 @@ ecma_builtin_array_prototype_object_filter (ecma_value_t this_arg, /**< this arg
   /* 4. */
   if (!ecma_op_is_callable (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Callback function is not callable."));
   }
   else
   {
@@ -2517,7 +2517,7 @@ ecma_builtin_array_prototype_object_reduce (ecma_value_t this_arg, /**< this arg
   /* 4. */
   if (!ecma_op_is_callable (callbackfn))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Callback function is not callable."));
   }
   else
   {
@@ -2530,7 +2530,7 @@ ecma_builtin_array_prototype_object_reduce (ecma_value_t this_arg, /**< this arg
     /* 5. */
     if (len_number == ECMA_NUMBER_ZERO && ecma_is_value_undefined (initial_value))
     {
-      ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+      ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Initial value cannot be undefined."));
     }
     else
     {
@@ -2577,7 +2577,7 @@ ecma_builtin_array_prototype_object_reduce (ecma_value_t this_arg, /**< this arg
         /* 8.c */
         if (!k_present)
         {
-          ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+          ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Missing array element."));
         }
       }
       /* 9. */
@@ -2672,7 +2672,7 @@ ecma_builtin_array_prototype_object_reduce_right (ecma_value_t this_arg, /**< th
   /* 4. */
   if (!ecma_op_is_callable (callbackfn))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Callback function is not callable."));
   }
   else
   {
@@ -2684,7 +2684,7 @@ ecma_builtin_array_prototype_object_reduce_right (ecma_value_t this_arg, /**< th
     /* 5. */
     if (len_number == ECMA_NUMBER_ZERO && ecma_is_value_undefined (initial_value))
     {
-      ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+      ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Initial value cannot be undefined."));
     }
     else
     {
@@ -2733,7 +2733,7 @@ ecma_builtin_array_prototype_object_reduce_right (ecma_value_t this_arg, /**< th
         /* 8.c */
         if (!k_present)
         {
-          ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+          ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Missing array element."));
         }
       }
       /* 9. */
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-boolean-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-boolean-prototype.c
index 4249f0320..fd4812419 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-boolean-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-boolean-prototype.c
@@ -112,7 +112,7 @@ ecma_builtin_boolean_prototype_object_value_of (ecma_value_t this_arg) /**< this
     }
   }
 
-  return ecma_raise_type_error (ECMA_ERR_MSG (""));
+  return ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a Boolean object."));
 } /* ecma_builtin_boolean_prototype_object_value_of */
 
 /**
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.c
index d29302f8b..fd6fe182b 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.c
@@ -257,7 +257,7 @@ ecma_builtin_date_prototype_get_time (ecma_value_t this_arg) /**< this argument
     }
   }
 
-  return ecma_raise_type_error (ECMA_ERR_MSG (""));
+  return ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a Date object."));
 } /* ecma_builtin_date_prototype_get_time */
 
 /**
@@ -1137,7 +1137,7 @@ ecma_builtin_date_prototype_to_iso_string (ecma_value_t this_arg) /**< this argu
 
   if (ecma_number_is_nan (prim_num) || ecma_number_is_infinity (prim_num))
   {
-    ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_range_error (ECMA_ERR_MSG ("Time must be a finite number."));
   }
   else
   {
@@ -1199,7 +1199,7 @@ ecma_builtin_date_prototype_to_json (ecma_value_t this_arg, /**< this argument *
     /* 5. */
     if (!ecma_op_is_callable (to_iso))
     {
-      ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+      ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("'toISOString' is missing or not a function."));
     }
     /* 6. */
     else
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-error-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-error-prototype.c
index a9834bc46..e8c82d126 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-error-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-error-prototype.c
@@ -61,7 +61,7 @@ ecma_builtin_error_prototype_object_to_string (ecma_value_t this_arg) /**< this
   // 2.
   if (!ecma_is_value_object (this_arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not an object."));
   }
   else
   {
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-function-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-function-prototype.c
index 8b7e9ac58..6d2971a97 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-function-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-function-prototype.c
@@ -60,7 +60,7 @@ ecma_builtin_function_prototype_object_to_string (ecma_value_t this_arg) /**< th
 
   if (!ecma_op_is_callable (this_arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a function."));
   }
   else
   {
@@ -89,7 +89,7 @@ ecma_builtin_function_prototype_object_apply (ecma_value_t this_arg, /**< this a
   /* 1. */
   if (!ecma_op_is_callable (this_arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a function."));
   }
   else
   {
@@ -105,7 +105,7 @@ ecma_builtin_function_prototype_object_apply (ecma_value_t this_arg, /**< this a
       /* 3. */
       if (!ecma_is_value_object (arg2))
       {
-        ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+        ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
       }
       else
       {
@@ -188,7 +188,7 @@ ecma_builtin_function_prototype_object_call (ecma_value_t this_arg, /**< this ar
 {
   if (!ecma_op_is_callable (this_arg))
   {
-    return ecma_raise_type_error (ECMA_ERR_MSG (""));
+    return ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a function."));
   }
   else
   {
@@ -231,7 +231,7 @@ ecma_builtin_function_prototype_object_bind (ecma_value_t this_arg, /**< this ar
   /* 2. */
   if (!ecma_op_is_callable (this_arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a function."));
   }
   else
   {
@@ -387,7 +387,7 @@ ecma_builtin_function_prototype_dispatch_construct (const ecma_value_t *argument
 {
   JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL);
 
-  return ecma_raise_type_error (ECMA_ERR_MSG (""));
+  return ecma_raise_type_error (ECMA_ERR_MSG ("'Function.prototype' is not a constructor."));
 } /* ecma_builtin_function_prototype_dispatch_construct */
 
 /**
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-global.c b/jerry-core/ecma/builtin-objects/ecma-builtin-global.c
index e2ca19a8f..7b233ffe5 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-global.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-global.c
@@ -774,7 +774,7 @@ ecma_builtin_global_object_decode_uri_helper (ecma_value_t uri, /**< uri argumen
 
     if (!lit_read_code_unit_from_hex (input_char_p + 1, 2, &decoded_byte))
     {
-      ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+      ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Invalid hexadecimal value."));
       break;
     }
 
@@ -830,7 +830,7 @@ ecma_builtin_global_object_decode_uri_helper (ecma_value_t uri, /**< uri argumen
 
       if (!lit_read_code_unit_from_hex (input_char_p + 1, 2, &decoded_byte))
       {
-        ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+        ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Invalid hexadecimal value."));
         break;
       }
 
@@ -868,7 +868,7 @@ ecma_builtin_global_object_decode_uri_helper (ecma_value_t uri, /**< uri argumen
         }
         else
         {
-          ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+          ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Invalid UTF8 character."));
           break;
         }
 
@@ -902,7 +902,7 @@ ecma_builtin_global_object_decode_uri_helper (ecma_value_t uri, /**< uri argumen
         if (!is_valid
             || !lit_is_utf8_string_valid (octets, bytes_count))
         {
-          ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+          ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Invalid UTF8 string."));
           break;
         }
 
@@ -912,7 +912,7 @@ ecma_builtin_global_object_decode_uri_helper (ecma_value_t uri, /**< uri argumen
         if (lit_is_code_point_utf16_high_surrogate (cp)
             || lit_is_code_point_utf16_low_surrogate (cp))
         {
-          ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+          ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Invalid UTF8 codepoint."));
           break;
         }
 
@@ -931,7 +931,7 @@ ecma_builtin_global_object_decode_uri_helper (ecma_value_t uri, /**< uri argumen
       }
       else
       {
-        ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+        ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Invalid CESU8 string."));
       }
     }
 
@@ -1042,7 +1042,7 @@ ecma_builtin_global_object_encode_uri_helper (ecma_value_t uri, /**< uri argumen
 
     if (lit_is_code_point_utf16_low_surrogate (ch))
     {
-      ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+      ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Unicode surrogate pair missing."));
       break;
     }
 
@@ -1052,7 +1052,7 @@ ecma_builtin_global_object_encode_uri_helper (ecma_value_t uri, /**< uri argumen
     {
       if (input_char_p == input_end_p)
       {
-        ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+        ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Unicode surrogate pair missing."));
         break;
       }
 
@@ -1066,7 +1066,7 @@ ecma_builtin_global_object_encode_uri_helper (ecma_value_t uri, /**< uri argumen
       }
       else
       {
-        ret_value = ecma_raise_uri_error (ECMA_ERR_MSG (""));
+        ret_value = ecma_raise_uri_error (ECMA_ERR_MSG ("Unicode surrogate pair missing."));
         break;
       }
     }
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-helpers.c b/jerry-core/ecma/builtin-objects/ecma-builtin-helpers.c
index 8b6e80de0..9f405426e 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-helpers.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-helpers.c
@@ -165,7 +165,7 @@ ecma_builtin_helper_get_to_locale_string_at_index (ecma_object_t *obj_p, /**< th
     }
     else
     {
-      ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+      ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("'toLocaleString' is missing or not a function."));
     }
 
     ECMA_FINALIZE (to_locale_value);
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-json.c b/jerry-core/ecma/builtin-objects/ecma-builtin-json.c
index 5f5522e89..62d9c661b 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-json.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-json.c
@@ -737,7 +737,7 @@ ecma_builtin_json_parse (ecma_value_t this_arg, /**< 'this' argument */
 
   if (ecma_is_value_undefined (final_result))
   {
-    ret_value = ecma_raise_syntax_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_syntax_error (ECMA_ERR_MSG ("Could not parse JSON string."));
   }
   else
   {
@@ -1412,7 +1412,7 @@ ecma_builtin_json_object (ecma_object_t *obj_p, /**< the object*/
   /* 1. */
   if (ecma_has_object_value_in_collection (context_p->occurence_stack_p, obj_value))
   {
-    return ecma_raise_type_error (ECMA_ERR_MSG (""));
+    return ecma_raise_type_error (ECMA_ERR_MSG ("The structure is cyclical."));
   }
 
   ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
@@ -1612,7 +1612,7 @@ ecma_builtin_json_array (ecma_object_t *obj_p, /**< the array object*/
   /* 1. */
   if (ecma_has_object_value_in_collection (context_p->occurence_stack_p, obj_value))
   {
-    return ecma_raise_type_error (ECMA_ERR_MSG (""));
+    return ecma_raise_type_error (ECMA_ERR_MSG ("The structure is cyclical."));
   }
 
   ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-number-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-number-prototype.c
index 83e2e0e2d..b1869a7c7 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-number-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-number-prototype.c
@@ -221,7 +221,7 @@ ecma_builtin_number_prototype_object_to_string (ecma_value_t this_arg, /**< this
 
     if (radix < 2 || radix > 36)
     {
-      ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
+      ret_value = ecma_raise_range_error (ECMA_ERR_MSG ("Radix must be between 2 and 36."));
     }
     else if (radix == 10)
     {
@@ -463,7 +463,7 @@ ecma_builtin_number_prototype_object_value_of (ecma_value_t this_arg) /**< this
     }
   }
 
-  return ecma_raise_type_error (ECMA_ERR_MSG (""));
+  return ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a Number or a Number object."));
 } /* ecma_builtin_number_prototype_object_value_of */
 
 /**
@@ -489,7 +489,7 @@ ecma_builtin_number_prototype_object_to_fixed (ecma_value_t this_arg, /**< this
   /* 2. */
   if (arg_num <= -1 || arg_num >= 21)
   {
-    ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_range_error (ECMA_ERR_MSG ("Fraction digits must be between 0 and 20."));
   }
   else
   {
@@ -628,7 +628,7 @@ ecma_builtin_number_prototype_object_to_exponential (ecma_value_t this_arg, /**<
   /* 7. */
   if (arg_num <= -1.0 || arg_num >= 21.0)
   {
-    ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_range_error (ECMA_ERR_MSG ("Fraction digits must be between 0 and 20."));
   }
   else
   {
@@ -816,7 +816,7 @@ ecma_builtin_number_prototype_object_to_precision (ecma_value_t this_arg, /**< t
       /* 8. */
       else if (arg_num < 1.0 || arg_num >= 22.0)
       {
-        ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
+        ret_value = ecma_raise_range_error (ECMA_ERR_MSG ("Precision must be between 1 and 21."));
       }
       else
       {
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-object-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-object-prototype.c
index 11ab8e053..e3ad1cc16 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-object-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-object-prototype.c
@@ -104,7 +104,7 @@ ecma_builtin_object_prototype_object_to_locale_string (ecma_value_t this_arg) /*
   /* 3. */
   if (!ecma_op_is_callable (to_string_val))
   {
-    return_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    return_value = ecma_raise_type_error (ECMA_ERR_MSG ("'toString is missing or not a function.'"));
   }
   else
   {
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-object.c b/jerry-core/ecma/builtin-objects/ecma-builtin-object.c
index 8a54b1d3d..950ccc4ae 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-object.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-object.c
@@ -114,7 +114,7 @@ ecma_builtin_object_object_get_prototype_of (ecma_value_t this_arg, /**< 'this'
   /* 1. */
   if (!ecma_is_value_object (arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -155,7 +155,7 @@ ecma_builtin_object_object_get_own_property_names (ecma_value_t this_arg, /**< '
   if (!ecma_is_value_object (arg))
   {
     /* 1. */
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -186,7 +186,7 @@ ecma_builtin_object_object_seal (ecma_value_t this_arg, /**< 'this' argument */
   // 1.
   if (!ecma_is_value_object (arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -260,7 +260,7 @@ ecma_builtin_object_object_freeze (ecma_value_t this_arg, /**< 'this' argument *
   // 1.
   if (!ecma_is_value_object (arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -340,7 +340,7 @@ ecma_builtin_object_object_prevent_extensions (ecma_value_t this_arg, /**< 'this
 
   if (!ecma_is_value_object (arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -372,7 +372,7 @@ ecma_builtin_object_object_is_sealed (ecma_value_t this_arg, /**< 'this' argumen
   // 1.
   if (!ecma_is_value_object (arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -444,7 +444,7 @@ ecma_builtin_object_object_is_frozen (ecma_value_t this_arg, /**< 'this' argumen
   // 1.
   if (!ecma_is_value_object (arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -522,7 +522,7 @@ ecma_builtin_object_object_is_extensible (ecma_value_t this_arg, /**< 'this' arg
 
   if (!ecma_is_value_object (arg))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -556,7 +556,7 @@ ecma_builtin_object_object_keys (ecma_value_t this_arg, /**< 'this' argument */
   if (!ecma_is_value_object (arg))
   {
     /* 1. */
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -588,7 +588,7 @@ ecma_builtin_object_object_get_own_property_descriptor (ecma_value_t this_arg, /
   // 1.
   if (!ecma_is_value_object (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
     return ret_value;
   }
 
@@ -642,7 +642,7 @@ ecma_builtin_object_object_create (ecma_value_t this_arg, /**< 'this' argument *
   // 1.
   if (!ecma_is_value_object (arg1) && !ecma_is_value_null (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -698,7 +698,7 @@ ecma_builtin_object_object_define_properties (ecma_value_t this_arg, /**< 'this'
   // 1.
   if (!ecma_is_value_object (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
@@ -805,7 +805,7 @@ ecma_builtin_object_object_define_property (ecma_value_t this_arg, /**< 'this' a
 
   if (!ecma_is_value_object (arg1))
   {
-    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an object."));
   }
   else
   {
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c b/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
index 1cda83ecc..c16996f83 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
@@ -84,7 +84,7 @@ ecma_builtin_string_prototype_object_to_string (ecma_value_t this_arg) /**< this
     }
   }
 
-  return ecma_raise_type_error (ECMA_ERR_MSG (""));
+  return ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a String or a String object."));
 } /* ecma_builtin_string_prototype_object_to_string */
 
 /**