diff --git a/lib/options.json b/lib/options.json
index ac7906848b..602850e698 100644
--- a/lib/options.json
+++ b/lib/options.json
@@ -16,10 +16,6 @@
         },
         "publicPath": {
           "anyOf": [
-            {
-              "type": "string",
-              "minLength": 1
-            },
             {
               "type": "array",
               "items": {
@@ -27,6 +23,10 @@
                 "minLength": 1
               },
               "minItems": 1
+            },
+            {
+              "type": "string",
+              "minLength": 1
             }
           ],
           "description": "The bundled files will be available in the browser under this path."
@@ -74,13 +74,6 @@
       "properties": {
         "target": {
           "anyOf": [
-            {
-              "type": "boolean"
-            },
-            {
-              "type": "string",
-              "minLength": 1
-            },
             {
               "type": "array",
               "items": {
@@ -88,16 +81,19 @@
                 "minLength": 1
               },
               "minItems": 1
+            },
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "string",
+              "minLength": 1
             }
           ],
           "description": "Open specified route in browser."
         },
         "app": {
           "anyOf": [
-            {
-              "type": "string",
-              "minLength": 1
-            },
             {
               "type": "array",
               "items": {
@@ -105,6 +101,10 @@
                 "minLength": 1
               },
               "minItems": 1
+            },
+            {
+              "type": "string",
+              "minLength": 1
             }
           ],
           "description": "Open specified browser."
@@ -120,16 +120,16 @@
       "properties": {
         "paths": {
           "anyOf": [
-            {
-              "type": "string",
-              "minLength": 1
-            },
             {
               "type": "array",
               "items": {
                 "type": "string",
                 "minLength": 1
               }
+            },
+            {
+              "type": "string",
+              "minLength": 1
             }
           ]
         },
@@ -457,15 +457,6 @@
     },
     "open": {
       "anyOf": [
-        {
-          "$ref": "#/definitions/OpenBoolean"
-        },
-        {
-          "$ref": "#/definitions/OpenString"
-        },
-        {
-          "$ref": "#/definitions/OpenObject"
-        },
         {
           "type": "array",
           "items": {
@@ -479,6 +470,15 @@
             ]
           },
           "minItems": 1
+        },
+        {
+          "$ref": "#/definitions/OpenBoolean"
+        },
+        {
+          "$ref": "#/definitions/OpenString"
+        },
+        {
+          "$ref": "#/definitions/OpenObject"
         }
       ],
       "description": "Tells dev-server to open the browser after server had been started. Set it to true to open your default browser. https://webpack.js.org/configuration/dev-server/#devserveropen"
@@ -529,15 +529,6 @@
     },
     "static": {
       "anyOf": [
-        {
-          "type": "boolean"
-        },
-        {
-          "$ref": "#/definitions/StaticString"
-        },
-        {
-          "$ref": "#/definitions/StaticObject"
-        },
         {
           "type": "array",
           "items": {
@@ -551,18 +542,21 @@
             ]
           },
           "minItems": 1
+        },
+        {
+          "type": "boolean"
+        },
+        {
+          "$ref": "#/definitions/StaticString"
+        },
+        {
+          "$ref": "#/definitions/StaticObject"
         }
       ],
       "description": "It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic"
     },
     "watchFiles": {
       "anyOf": [
-        {
-          "$ref": "#/definitions/WatchFilesString"
-        },
-        {
-          "$ref": "#/definitions/WatchFilesObject"
-        },
         {
           "type": "array",
           "items": {
@@ -575,6 +569,12 @@
               }
             ]
           }
+        },
+        {
+          "$ref": "#/definitions/WatchFilesString"
+        },
+        {
+          "$ref": "#/definitions/WatchFilesObject"
         }
       ],
       "description": "List of files to watch for file changes and serve. https://webpack.js.org/configuration/dev-server/#devserverwatchfiles"
diff --git a/test/__snapshots__/validate-options.test.js.snap.webpack4 b/test/__snapshots__/validate-options.test.js.snap.webpack4
index 245477b9b2..06f80a1aae 100644
--- a/test/__snapshots__/validate-options.test.js.snap.webpack4
+++ b/test/__snapshots__/validate-options.test.js.snap.webpack4
@@ -335,16 +335,16 @@ exports[`options validate should throw an error on the "open" option with '[]' v
 exports[`options validate should throw an error on the "open" option with '{"app":true}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.open should be one of these:
-   boolean | non-empty string | object { target?, app? } | [non-empty string | object { target?, app? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { target?, app? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { target?, app? }
    -> Tells dev-server to open the browser after server had been started. Set it to true to open your default browser. https://webpack.js.org/configuration/dev-server/#devserveropen
    Details:
     * configuration.open.app should be one of these:
-      non-empty string | [non-empty string, ...] (should not have fewer than 1 item)
+      [non-empty string, ...] (should not have fewer than 1 item) | non-empty string
       -> Open specified browser.
       Details:
-       * configuration.open.app should be a non-empty string.
        * configuration.open.app should be an array:
-         [non-empty string, ...] (should not have fewer than 1 item)"
+         [non-empty string, ...] (should not have fewer than 1 item)
+       * configuration.open.app should be a non-empty string."
 `;
 
 exports[`options validate should throw an error on the "open" option with '{"foo":"bar"}' value 1`] = `
@@ -356,17 +356,17 @@ exports[`options validate should throw an error on the "open" option with '{"foo
 exports[`options validate should throw an error on the "open" option with '{"target":90}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.open should be one of these:
-   boolean | non-empty string | object { target?, app? } | [non-empty string | object { target?, app? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { target?, app? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { target?, app? }
    -> Tells dev-server to open the browser after server had been started. Set it to true to open your default browser. https://webpack.js.org/configuration/dev-server/#devserveropen
    Details:
     * configuration.open.target should be one of these:
-      boolean | non-empty string | [non-empty string, ...] (should not have fewer than 1 item)
+      [non-empty string, ...] (should not have fewer than 1 item) | boolean | non-empty string
       -> Open specified route in browser.
       Details:
-       * configuration.open.target should be a boolean.
-       * configuration.open.target should be a non-empty string.
        * configuration.open.target should be an array:
-         [non-empty string, ...] (should not have fewer than 1 item)"
+         [non-empty string, ...] (should not have fewer than 1 item)
+       * configuration.open.target should be a boolean.
+       * configuration.open.target should be a non-empty string."
 `;
 
 exports[`options validate should throw an error on the "port" option with 'false' value 1`] = `
@@ -440,22 +440,22 @@ exports[`options validate should throw an error on the "static" option with '{"d
 exports[`options validate should throw an error on the "static" option with '{"publicPath":false}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
     * configuration.static.publicPath should be one of these:
-      non-empty string | [non-empty string, ...] (should not have fewer than 1 item)
+      [non-empty string, ...] (should not have fewer than 1 item) | non-empty string
       -> The bundled files will be available in the browser under this path.
       Details:
-       * configuration.static.publicPath should be a non-empty string.
        * configuration.static.publicPath should be an array:
-         [non-empty string, ...] (should not have fewer than 1 item)"
+         [non-empty string, ...] (should not have fewer than 1 item)
+       * configuration.static.publicPath should be a non-empty string."
 `;
 
 exports[`options validate should throw an error on the "static" option with '{"serveIndex":"true"}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
     * configuration.static.serveIndex should be one of these:
@@ -470,7 +470,7 @@ exports[`options validate should throw an error on the "static" option with '{"s
 exports[`options validate should throw an error on the "static" option with '{"watch":10}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
     * configuration.static.watch should be one of these:
@@ -486,55 +486,55 @@ exports[`options validate should throw an error on the "static" option with '{"w
 exports[`options validate should throw an error on the "static" option with '0' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
+    * configuration.static should be an array:
+      [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
     * configuration.static should be a boolean.
     * configuration.static should be a non-empty string.
     * configuration.static should be an object:
-      object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
-    * configuration.static should be an array:
-      [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)"
+      object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }"
 `;
 
 exports[`options validate should throw an error on the "static" option with 'null' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
+    * configuration.static should be an array:
+      [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
     * configuration.static should be a boolean.
     * configuration.static should be a non-empty string.
     * configuration.static should be an object:
-      object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
-    * configuration.static should be an array:
-      [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)"
+      object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }"
 `;
 
 exports[`options validate should throw an error on the "watchFiles" option with '123' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.watchFiles should be one of these:
-   non-empty string | object { paths?, options? } | [non-empty string | object { paths?, options? }, ...]
+   [non-empty string | object { paths?, options? }, ...] | non-empty string | object { paths?, options? }
    -> List of files to watch for file changes and serve. https://webpack.js.org/configuration/dev-server/#devserverwatchfiles
    Details:
+    * configuration.watchFiles should be an array:
+      [non-empty string | object { paths?, options? }, ...]
     * configuration.watchFiles should be a non-empty string.
     * configuration.watchFiles should be an object:
-      object { paths?, options? }
-    * configuration.watchFiles should be an array:
-      [non-empty string | object { paths?, options? }, ...]"
+      object { paths?, options? }"
 `;
 
 exports[`options validate should throw an error on the "watchFiles" option with 'false' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.watchFiles should be one of these:
-   non-empty string | object { paths?, options? } | [non-empty string | object { paths?, options? }, ...]
+   [non-empty string | object { paths?, options? }, ...] | non-empty string | object { paths?, options? }
    -> List of files to watch for file changes and serve. https://webpack.js.org/configuration/dev-server/#devserverwatchfiles
    Details:
+    * configuration.watchFiles should be an array:
+      [non-empty string | object { paths?, options? }, ...]
     * configuration.watchFiles should be a non-empty string.
     * configuration.watchFiles should be an object:
-      object { paths?, options? }
-    * configuration.watchFiles should be an array:
-      [non-empty string | object { paths?, options? }, ...]"
+      object { paths?, options? }"
 `;
 
 exports[`options validate should throw an error on the "webSocketServer" option with '{"notAnOption":true}' value 1`] = `
diff --git a/test/__snapshots__/validate-options.test.js.snap.webpack5 b/test/__snapshots__/validate-options.test.js.snap.webpack5
index 245477b9b2..06f80a1aae 100644
--- a/test/__snapshots__/validate-options.test.js.snap.webpack5
+++ b/test/__snapshots__/validate-options.test.js.snap.webpack5
@@ -335,16 +335,16 @@ exports[`options validate should throw an error on the "open" option with '[]' v
 exports[`options validate should throw an error on the "open" option with '{"app":true}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.open should be one of these:
-   boolean | non-empty string | object { target?, app? } | [non-empty string | object { target?, app? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { target?, app? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { target?, app? }
    -> Tells dev-server to open the browser after server had been started. Set it to true to open your default browser. https://webpack.js.org/configuration/dev-server/#devserveropen
    Details:
     * configuration.open.app should be one of these:
-      non-empty string | [non-empty string, ...] (should not have fewer than 1 item)
+      [non-empty string, ...] (should not have fewer than 1 item) | non-empty string
       -> Open specified browser.
       Details:
-       * configuration.open.app should be a non-empty string.
        * configuration.open.app should be an array:
-         [non-empty string, ...] (should not have fewer than 1 item)"
+         [non-empty string, ...] (should not have fewer than 1 item)
+       * configuration.open.app should be a non-empty string."
 `;
 
 exports[`options validate should throw an error on the "open" option with '{"foo":"bar"}' value 1`] = `
@@ -356,17 +356,17 @@ exports[`options validate should throw an error on the "open" option with '{"foo
 exports[`options validate should throw an error on the "open" option with '{"target":90}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.open should be one of these:
-   boolean | non-empty string | object { target?, app? } | [non-empty string | object { target?, app? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { target?, app? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { target?, app? }
    -> Tells dev-server to open the browser after server had been started. Set it to true to open your default browser. https://webpack.js.org/configuration/dev-server/#devserveropen
    Details:
     * configuration.open.target should be one of these:
-      boolean | non-empty string | [non-empty string, ...] (should not have fewer than 1 item)
+      [non-empty string, ...] (should not have fewer than 1 item) | boolean | non-empty string
       -> Open specified route in browser.
       Details:
-       * configuration.open.target should be a boolean.
-       * configuration.open.target should be a non-empty string.
        * configuration.open.target should be an array:
-         [non-empty string, ...] (should not have fewer than 1 item)"
+         [non-empty string, ...] (should not have fewer than 1 item)
+       * configuration.open.target should be a boolean.
+       * configuration.open.target should be a non-empty string."
 `;
 
 exports[`options validate should throw an error on the "port" option with 'false' value 1`] = `
@@ -440,22 +440,22 @@ exports[`options validate should throw an error on the "static" option with '{"d
 exports[`options validate should throw an error on the "static" option with '{"publicPath":false}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
     * configuration.static.publicPath should be one of these:
-      non-empty string | [non-empty string, ...] (should not have fewer than 1 item)
+      [non-empty string, ...] (should not have fewer than 1 item) | non-empty string
       -> The bundled files will be available in the browser under this path.
       Details:
-       * configuration.static.publicPath should be a non-empty string.
        * configuration.static.publicPath should be an array:
-         [non-empty string, ...] (should not have fewer than 1 item)"
+         [non-empty string, ...] (should not have fewer than 1 item)
+       * configuration.static.publicPath should be a non-empty string."
 `;
 
 exports[`options validate should throw an error on the "static" option with '{"serveIndex":"true"}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
     * configuration.static.serveIndex should be one of these:
@@ -470,7 +470,7 @@ exports[`options validate should throw an error on the "static" option with '{"s
 exports[`options validate should throw an error on the "static" option with '{"watch":10}' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
     * configuration.static.watch should be one of these:
@@ -486,55 +486,55 @@ exports[`options validate should throw an error on the "static" option with '{"w
 exports[`options validate should throw an error on the "static" option with '0' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
+    * configuration.static should be an array:
+      [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
     * configuration.static should be a boolean.
     * configuration.static should be a non-empty string.
     * configuration.static should be an object:
-      object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
-    * configuration.static should be an array:
-      [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)"
+      object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }"
 `;
 
 exports[`options validate should throw an error on the "static" option with 'null' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.static should be one of these:
-   boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? } | [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
+   [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item) | boolean | non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
    -> It is possible to configure advanced options for serving static files from directory. See the Express documentation for the possible options. https://webpack.js.org/configuration/dev-server/#devserverstatic
    Details:
+    * configuration.static should be an array:
+      [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)
     * configuration.static should be a boolean.
     * configuration.static should be a non-empty string.
     * configuration.static should be an object:
-      object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }
-    * configuration.static should be an array:
-      [non-empty string | object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }, ...] (should not have fewer than 1 item)"
+      object { directory?, staticOptions?, publicPath?, serveIndex?, watch? }"
 `;
 
 exports[`options validate should throw an error on the "watchFiles" option with '123' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.watchFiles should be one of these:
-   non-empty string | object { paths?, options? } | [non-empty string | object { paths?, options? }, ...]
+   [non-empty string | object { paths?, options? }, ...] | non-empty string | object { paths?, options? }
    -> List of files to watch for file changes and serve. https://webpack.js.org/configuration/dev-server/#devserverwatchfiles
    Details:
+    * configuration.watchFiles should be an array:
+      [non-empty string | object { paths?, options? }, ...]
     * configuration.watchFiles should be a non-empty string.
     * configuration.watchFiles should be an object:
-      object { paths?, options? }
-    * configuration.watchFiles should be an array:
-      [non-empty string | object { paths?, options? }, ...]"
+      object { paths?, options? }"
 `;
 
 exports[`options validate should throw an error on the "watchFiles" option with 'false' value 1`] = `
 "ValidationError: Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
  - configuration.watchFiles should be one of these:
-   non-empty string | object { paths?, options? } | [non-empty string | object { paths?, options? }, ...]
+   [non-empty string | object { paths?, options? }, ...] | non-empty string | object { paths?, options? }
    -> List of files to watch for file changes and serve. https://webpack.js.org/configuration/dev-server/#devserverwatchfiles
    Details:
+    * configuration.watchFiles should be an array:
+      [non-empty string | object { paths?, options? }, ...]
     * configuration.watchFiles should be a non-empty string.
     * configuration.watchFiles should be an object:
-      object { paths?, options? }
-    * configuration.watchFiles should be an array:
-      [non-empty string | object { paths?, options? }, ...]"
+      object { paths?, options? }"
 `;
 
 exports[`options validate should throw an error on the "webSocketServer" option with '{"notAnOption":true}' value 1`] = `