diff --git a/lib/cartodb/models/aggregation/aggregation-validator.js b/lib/cartodb/models/aggregation/aggregation-validator.js
index 25c06ec4..97f31b27 100644
--- a/lib/cartodb/models/aggregation/aggregation-validator.js
+++ b/lib/cartodb/models/aggregation/aggregation-validator.js
@@ -31,13 +31,31 @@ module.exports.createPositiveNumberValidator = function (mapconfig) {
 };
 
 module.exports.createAggregationColumnsValidator = function (mapconfig, validAggregatedFunctions) {
+    const validateAggregationColumnNames = createAggregationColumnNamesValidator(mapconfig);
+    const validateAggregateFunction = createAggregateFunctionValidator(mapconfig, validAggregatedFunctions);
+    const validateAggregatedColumn = createAggregatedColumnValidator(mapconfig);
+
     return function validateAggregationColumns (value, key, index) {
+        validateAggregationColumnNames(value, key, index);
+        validateAggregateFunction(value, key, index);
+        validateAggregatedColumn(value, key, index);
+    };
+};
+
+function createAggregationColumnNamesValidator(mapconfig) {
+    return function validateAggregationColumnNames (value, key, index) {
         Object.keys(value).forEach((columnName) => {
             if (columnName.length <= 0) {
                 const message = `Invalid column name, should be a non empty string`;
                 throw createLayerError(message, mapconfig, index);
             }
+        });
+    };
+}
 
+function createAggregateFunctionValidator (mapconfig, validAggregatedFunctions) {
+    return function validateAggregateFunction (value, key, index) {
+        Object.keys(value).forEach((columnName) => {
             const { aggregate_function } = value[columnName];
 
             if (!validAggregatedFunctions.includes(aggregate_function)) {
@@ -45,7 +63,13 @@ module.exports.createAggregationColumnsValidator = function (mapconfig, validAgg
                                 ` valid ones: ${validAggregatedFunctions.join(', ')}`;
                 throw createLayerError(message, mapconfig, index);
             }
+        });
+    };
+}
 
+function createAggregatedColumnValidator (mapconfig) {
+    return function validateAggregatedColumn (value, key, index) {
+        Object.keys(value).forEach((columnName) => {
             const { aggregated_column } = value[columnName];
 
             if (typeof aggregated_column !== 'string' || aggregated_column <= 0) {
@@ -54,7 +78,7 @@ module.exports.createAggregationColumnsValidator = function (mapconfig, validAgg
             }
         });
     };
-};
+}
 
 function createLayerError(message, mapconfig, index) {
     const error = new Error(message);