diff --git a/src/core/components/parameter-row.jsx b/src/core/components/parameter-row.jsx
index 8ed25ecc..d935e91e 100644
--- a/src/core/components/parameter-row.jsx
+++ b/src/core/components/parameter-row.jsx
@@ -188,7 +188,7 @@ export default class ParameterRow extends Component {
                               required={ required }
                               description={param.get("description") ? `${param.get("name")} - ${param.get("description")}` : `${param.get("name")}`}
                               onChange={ this.onChangeWrapper }
-                              errors={ param.get("errors") }
+                              errors={ paramWithMeta.get("errors") }
                               schema={ isOAS3 && isOAS3() ? param.get("schema") : param }/>
           }
 
diff --git a/test/e2e/scenarios/bugs/4374.js b/test/e2e/scenarios/bugs/4374.js
new file mode 100644
index 00000000..601a6d91
--- /dev/null
+++ b/test/e2e/scenarios/bugs/4374.js
@@ -0,0 +1,32 @@
+describe("bug #4374: OAS3 parameters should be visibly validated in Try-It-Out", function () {
+    let mainPage
+    beforeEach(function (client, done) {
+        mainPage = client
+            .url("localhost:3230")
+            .page.main()
+
+        client.waitForElementVisible(".download-url-input", 10000)
+            .pause(1000)
+            .clearValue(".download-url-input")
+            .setValue(".download-url-input", "http://localhost:3230/test-specs/bugs/4374.yaml")
+            .click("button.download-url-button")
+            .pause(1000)
+
+        done()
+    })
+    afterEach(function (client, done) {
+        done()
+    })
+    it("indicates an error when a required parameter is not selected", function (client) {
+        client.waitForElementVisible(".opblock-tag-section", 10000)
+            .assert.containsText(".opblock-summary-path span", "/pet/findByStatus")
+            .click(".opblock")
+            .waitForElementVisible(".opblock.is-open", 5000)
+            .click(".try-out__btn")
+            .click(".btn.execute")
+            .pause(100)
+            .assert.cssClassPresent(".parameters-col_description select", "invalid")
+
+        client.end()
+    })
+})
diff --git a/test/e2e/specs/bugs/4374.yaml b/test/e2e/specs/bugs/4374.yaml
new file mode 100644
index 00000000..61ecf810
--- /dev/null
+++ b/test/e2e/specs/bugs/4374.yaml
@@ -0,0 +1,228 @@
+---
+openapi: 3.0.0
+servers:
+- url: http://localhost:3204/
+info:
+  description: 'This is a sample server Petstore server.  You can find out more about
+    Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net, #swagger](http://swagger.io/irc/).  For
+    this sample, you can use the api key `special-key` to test the authorization filters.'
+  version: 1.0.0
+  title: Swagger Petstore
+  termsOfService: http://swagger.io/terms/
+  contact:
+    email: apiteam@swagger.io
+  license:
+    name: Apache 2.0
+    url: http://www.apache.org/licenses/LICENSE-2.0.html
+tags:
+- name: pet
+  description: Everything about your Pets
+  externalDocs:
+    description: Find out more
+    url: http://swagger.io
+- name: store
+  description: Access to Petstore orders
+- name: user
+  description: Operations about user
+  externalDocs:
+    description: Find out more about our store
+    url: http://swagger.io
+paths:
+  "/pet/findByStatus":
+    get:
+      tags:
+      - pet
+      summary: Finds Pets by status
+      description: Multiple status values can be provided with comma separated strings
+      operationId: findPetsByStatus
+      parameters:
+      - name: status
+        in: query
+        description: Status values that need to be considered for filter
+        required: true
+        explode: true
+        schema:
+          type: array
+          items:
+            type: string
+            enum:
+            - available
+            - pending
+            - sold
+            default: available
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/xml:
+              schema:
+                type: array
+                items:
+                  "$ref": "#/components/schemas/Pet"
+            application/json:
+              schema:
+                type: array
+                items:
+                  "$ref": "#/components/schemas/Pet"
+        '400':
+          description: Invalid status value
+      security:
+      - petstore_auth:
+        - write:pets
+        - read:pets
+externalDocs:
+  description: Find out more about Swagger
+  url: http://swagger.io
+components:
+  schemas:
+    Order:
+      type: object
+      properties:
+        id:
+          type: integer
+          format: int64
+        petId:
+          type: integer
+          format: int64
+        quantity:
+          type: integer
+          format: int32
+        shipDate:
+          type: string
+          format: date-time
+        status:
+          type: string
+          description: Order Status
+          enum:
+          - placed
+          - approved
+          - delivered
+        complete:
+          type: boolean
+          default: false
+      xml:
+        name: Order
+    Category:
+      type: object
+      properties:
+        id:
+          type: integer
+          format: int64
+        name:
+          type: string
+      xml:
+        name: Category
+    User:
+      type: object
+      properties:
+        id:
+          type: integer
+          format: int64
+        username:
+          type: string
+        firstName:
+          type: string
+        lastName:
+          type: string
+        email:
+          type: string
+        password:
+          type: string
+        phone:
+          type: string
+        userStatus:
+          type: integer
+          format: int32
+          description: User Status
+      xml:
+        name: User
+    Tag:
+      type: object
+      properties:
+        id:
+          type: integer
+          format: int64
+        name:
+          type: string
+      xml:
+        name: Tag
+    Pet:
+      type: object
+      required:
+      - name
+      - photoUrls
+      properties:
+        id:
+          type: integer
+          format: int64
+        category:
+          "$ref": "#/components/schemas/Category"
+        name:
+          type: string
+          example: doggie
+        photoUrls:
+          type: array
+          xml:
+            name: photoUrl
+            wrapped: true
+          items:
+            type: string
+        tags:
+          type: array
+          xml:
+            name: tag
+            wrapped: true
+          items:
+            "$ref": "#/components/schemas/Tag"
+        status:
+          type: string
+          description: pet status in the store
+          enum:
+          - available
+          - pending
+          - sold
+      xml:
+        name: Pet
+    ApiResponse:
+      type: object
+      properties:
+        code:
+          type: integer
+          format: int32
+        type:
+          type: string
+        message:
+          type: string
+  requestBodies:
+    Pet:
+      content:
+        application/json:
+          schema:
+            "$ref": "#/components/schemas/Pet"
+        application/xml:
+          schema:
+            "$ref": "#/components/schemas/Pet"
+      description: Pet object that needs to be added to the store
+      required: true
+    UserArray:
+      content:
+        application/json:
+          schema:
+            type: array
+            items:
+              "$ref": "#/components/schemas/User"
+      description: List of user object
+      required: true
+  securitySchemes:
+    petstore_auth:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: http://petstore.swagger.io/oauth/dialog
+          scopes:
+            write:pets: modify pets in your account
+            read:pets: read your pets
+    api_key:
+      type: apiKey
+      name: api_key
+      in: header