diff --git a/specification/resources/resource-manager/Microsoft.Resources/stable/2019-08-01/resources.json b/specification/resources/resource-manager/Microsoft.Resources/stable/2019-08-01/resources.json
index cc3f05489187..8ac65488e72d 100644
--- a/specification/resources/resource-manager/Microsoft.Resources/stable/2019-08-01/resources.json
+++ b/specification/resources/resource-manager/Microsoft.Resources/stable/2019-08-01/resources.json
@@ -285,6 +285,12 @@
               "$ref": "#/definitions/DeploymentValidateResult"
             }
           },
+          "400": {
+            "description": "Returns the validation result.",
+            "schema": {
+              "$ref": "#/definitions/DeploymentValidateResult"
+            }
+          },
           "default": {
             "description": "Error response describing why the operation failed.",
             "schema": {
@@ -580,6 +586,12 @@
               "$ref": "#/definitions/DeploymentValidateResult"
             }
           },
+          "400": {
+            "description": "Returns the validation result.",
+            "schema": {
+              "$ref": "#/definitions/DeploymentValidateResult"
+            }
+          },
           "default": {
             "description": "Error response describing why the operation failed.",
             "schema": {
@@ -887,6 +899,12 @@
               "$ref": "#/definitions/DeploymentValidateResult"
             }
           },
+          "400": {
+            "description": "Returns the validation result.",
+            "schema": {
+              "$ref": "#/definitions/DeploymentValidateResult"
+            }
+          },
           "default": {
             "description": "Error response describing why the operation failed.",
             "schema": {
@@ -1195,6 +1213,12 @@
               "$ref": "#/definitions/DeploymentValidateResult"
             }
           },
+          "400": {
+            "description": "Returns the validation result.",
+            "schema": {
+              "$ref": "#/definitions/DeploymentValidateResult"
+            }
+          },
           "default": {
             "description": "Error response describing why the operation failed.",
             "schema": {
@@ -1571,6 +1595,12 @@
               "$ref": "#/definitions/DeploymentValidateResult"
             }
           },
+          "400": {
+            "description": "Returns the validation result.",
+            "schema": {
+              "$ref": "#/definitions/DeploymentValidateResult"
+            }
+          },
           "default": {
             "description": "Error response describing why the operation failed.",
             "schema": {
@@ -4270,6 +4300,10 @@
     },
     "DeploymentValidateResult": {
       "properties": {
+        "error": {
+          "$ref": "../../../../../common-types/resource-management/v1/types.json#/definitions/ErrorResponse",
+          "description": "The deployment validation error."
+        },
         "properties": {
           "$ref": "#/definitions/DeploymentPropertiesExtended",
           "description": "The template deployment properties."