diff --git a/README.md b/README.md
index 9acf38b..fa36569 100644
--- a/README.md
+++ b/README.md
@@ -36,28 +36,6 @@ test('test title', ({ assert }) => {
 })
 ```
 
-## Register open API schemas
-You can register open API schema and then assert HTTP responses against.
-
-```ts
-configure({
-  plugins: [assert({
-    openApi: {
-      schemas: [new URL('../api-spec.json', import.meta.url)]
-    }
-  })]
-})
-```
-
-Validate response as follows.
-
-```ts
-test('get users', ({ assert }) => {
-  const response = await supertest(baseUrl).get('/users')
-  assert.isValidApiResponse(response)
-})
-```
-
 [github-actions-url]: https://github.com/japa/assert/actions/workflows/checks.yml
 [github-actions-image]: https://img.shields.io/github/actions/workflow/status/japa/assert/checks.yml?style=for-the-badge "github-actions"
 
diff --git a/api-spec.json b/api-spec.json
deleted file mode 100644
index f8f4d85..0000000
--- a/api-spec.json
+++ /dev/null
@@ -1,898 +0,0 @@
-{
-  "swagger": "2.0",
-  "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"
-    }
-  },
-  "host": "petstore.swagger.io",
-  "basePath": "/v2",
-  "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"
-      }
-    }
-  ],
-  "schemes": ["https", "http"],
-  "paths": {
-    "/pet": {
-      "post": {
-        "tags": ["pet"],
-        "summary": "Add a new pet to the store",
-        "description": "",
-        "operationId": "addPet",
-        "consumes": ["application/json", "application/xml"],
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "in": "body",
-            "name": "body",
-            "description": "Pet object that needs to be added to the store",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/Pet"
-            }
-          }
-        ],
-        "responses": {
-          "405": {
-            "description": "Invalid input"
-          }
-        },
-        "security": [
-          {
-            "petstore_auth": ["write:pets", "read:pets"]
-          }
-        ]
-      },
-      "put": {
-        "tags": ["pet"],
-        "summary": "Update an existing pet",
-        "description": "",
-        "operationId": "updatePet",
-        "consumes": ["application/json", "application/xml"],
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "in": "body",
-            "name": "body",
-            "description": "Pet object that needs to be added to the store",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/Pet"
-            }
-          }
-        ],
-        "responses": {
-          "400": {
-            "description": "Invalid ID supplied"
-          },
-          "404": {
-            "description": "Pet not found"
-          },
-          "405": {
-            "description": "Validation exception"
-          }
-        },
-        "security": [
-          {
-            "petstore_auth": ["write:pets", "read:pets"]
-          }
-        ]
-      }
-    },
-    "/pet/findByStatus": {
-      "get": {
-        "tags": ["pet"],
-        "summary": "Finds Pets by status",
-        "description": "Multiple status values can be provided with comma separated strings",
-        "operationId": "findPetsByStatus",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "status",
-            "in": "query",
-            "description": "Status values that need to be considered for filter",
-            "required": true,
-            "type": "array",
-            "items": {
-              "type": "string",
-              "enum": ["available", "pending", "sold"],
-              "default": "available"
-            },
-            "collectionFormat": "multi"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "type": "array",
-              "items": {
-                "$ref": "#/definitions/Pet"
-              }
-            }
-          },
-          "400": {
-            "description": "Invalid status value"
-          }
-        },
-        "security": [
-          {
-            "petstore_auth": ["write:pets", "read:pets"]
-          }
-        ]
-      }
-    },
-    "/pet/findByTags": {
-      "get": {
-        "tags": ["pet"],
-        "summary": "Finds Pets by tags",
-        "description": "Muliple tags can be provided with comma separated strings. Use         tag1, tag2, tag3 for testing.",
-        "operationId": "findPetsByTags",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "tags",
-            "in": "query",
-            "description": "Tags to filter by",
-            "required": true,
-            "type": "array",
-            "items": {
-              "type": "string"
-            },
-            "collectionFormat": "multi"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "type": "array",
-              "items": {
-                "$ref": "#/definitions/Pet"
-              }
-            }
-          },
-          "400": {
-            "description": "Invalid tag value"
-          }
-        },
-        "security": [
-          {
-            "petstore_auth": ["write:pets", "read:pets"]
-          }
-        ],
-        "deprecated": true
-      }
-    },
-    "/pet/{petId}": {
-      "get": {
-        "tags": ["pet"],
-        "summary": "Find pet by ID",
-        "description": "Returns a single pet",
-        "operationId": "getPetById",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "petId",
-            "in": "path",
-            "description": "ID of pet to return",
-            "required": true,
-            "type": "integer",
-            "format": "int64"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "$ref": "#/definitions/Pet"
-            }
-          },
-          "400": {
-            "description": "Invalid ID supplied",
-            "schema": {
-              "type": "object",
-              "required": ["message"],
-              "properties": {
-                "message": {
-                  "type": "string"
-                }
-              }
-            }
-          },
-          "404": {
-            "description": "Pet not found"
-          }
-        },
-        "security": [
-          {
-            "api_key": []
-          }
-        ]
-      },
-      "post": {
-        "tags": ["pet"],
-        "summary": "Updates a pet in the store with form data",
-        "description": "",
-        "operationId": "updatePetWithForm",
-        "consumes": ["application/x-www-form-urlencoded"],
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "petId",
-            "in": "path",
-            "description": "ID of pet that needs to be updated",
-            "required": true,
-            "type": "integer",
-            "format": "int64"
-          },
-          {
-            "name": "name",
-            "in": "formData",
-            "description": "Updated name of the pet",
-            "required": false,
-            "type": "string"
-          },
-          {
-            "name": "status",
-            "in": "formData",
-            "description": "Updated status of the pet",
-            "required": false,
-            "type": "string"
-          }
-        ],
-        "responses": {
-          "405": {
-            "description": "Invalid input"
-          }
-        },
-        "security": [
-          {
-            "petstore_auth": ["write:pets", "read:pets"]
-          }
-        ]
-      },
-      "delete": {
-        "tags": ["pet"],
-        "summary": "Deletes a pet",
-        "description": "",
-        "operationId": "deletePet",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "api_key",
-            "in": "header",
-            "required": false,
-            "type": "string"
-          },
-          {
-            "name": "petId",
-            "in": "path",
-            "description": "Pet id to delete",
-            "required": true,
-            "type": "integer",
-            "format": "int64"
-          }
-        ],
-        "responses": {
-          "400": {
-            "description": "Invalid ID supplied"
-          },
-          "404": {
-            "description": "Pet not found"
-          }
-        },
-        "security": [
-          {
-            "petstore_auth": ["write:pets", "read:pets"]
-          }
-        ]
-      }
-    },
-    "/pet/{petId}/uploadImage": {
-      "post": {
-        "tags": ["pet"],
-        "summary": "uploads an image",
-        "description": "",
-        "operationId": "uploadFile",
-        "consumes": ["multipart/form-data"],
-        "produces": ["application/json"],
-        "parameters": [
-          {
-            "name": "petId",
-            "in": "path",
-            "description": "ID of pet to update",
-            "required": true,
-            "type": "integer",
-            "format": "int64"
-          },
-          {
-            "name": "additionalMetadata",
-            "in": "formData",
-            "description": "Additional data to pass to server",
-            "required": false,
-            "type": "string"
-          },
-          {
-            "name": "file",
-            "in": "formData",
-            "description": "file to upload",
-            "required": false,
-            "type": "file"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "$ref": "#/definitions/ApiResponse"
-            }
-          }
-        },
-        "security": [
-          {
-            "petstore_auth": ["write:pets", "read:pets"]
-          }
-        ]
-      }
-    },
-    "/store/inventory": {
-      "get": {
-        "tags": ["store"],
-        "summary": "Returns pet inventories by status",
-        "description": "Returns a map of status codes to quantities",
-        "operationId": "getInventory",
-        "produces": ["application/json"],
-        "parameters": [],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "type": "object",
-              "additionalProperties": {
-                "type": "integer",
-                "format": "int32"
-              }
-            }
-          }
-        },
-        "security": [
-          {
-            "api_key": []
-          }
-        ]
-      }
-    },
-    "/store/order": {
-      "post": {
-        "tags": ["store"],
-        "summary": "Place an order for a pet",
-        "description": "",
-        "operationId": "placeOrder",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "in": "body",
-            "name": "body",
-            "description": "order placed for purchasing the pet",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/Order"
-            }
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "$ref": "#/definitions/Order"
-            }
-          },
-          "400": {
-            "description": "Invalid Order"
-          }
-        }
-      }
-    },
-    "/store/order/{orderId}": {
-      "get": {
-        "tags": ["store"],
-        "summary": "Find purchase order by ID",
-        "description": "For valid response try integer IDs with value >= 1 and <= 10.         Other values will generated exceptions",
-        "operationId": "getOrderById",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "orderId",
-            "in": "path",
-            "description": "ID of pet that needs to be fetched",
-            "required": true,
-            "type": "integer",
-            "maximum": 10,
-            "minimum": 1,
-            "format": "int64"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "$ref": "#/definitions/Order"
-            }
-          },
-          "400": {
-            "description": "Invalid ID supplied"
-          },
-          "404": {
-            "description": "Order not found"
-          }
-        }
-      },
-      "delete": {
-        "tags": ["store"],
-        "summary": "Delete purchase order by ID",
-        "description": "For valid response try integer IDs with positive integer value.         Negative or non-integer values will generate API errors",
-        "operationId": "deleteOrder",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "orderId",
-            "in": "path",
-            "description": "ID of the order that needs to be deleted",
-            "required": true,
-            "type": "integer",
-            "minimum": 1,
-            "format": "int64"
-          }
-        ],
-        "responses": {
-          "400": {
-            "description": "Invalid ID supplied"
-          },
-          "404": {
-            "description": "Order not found"
-          }
-        }
-      }
-    },
-    "/user": {
-      "post": {
-        "tags": ["user"],
-        "summary": "Create user",
-        "description": "This can only be done by the logged in user.",
-        "operationId": "createUser",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "in": "body",
-            "name": "body",
-            "description": "Created user object",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/User"
-            }
-          }
-        ],
-        "responses": {
-          "default": {
-            "description": "successful operation"
-          }
-        }
-      }
-    },
-    "/user/createWithArray": {
-      "post": {
-        "tags": ["user"],
-        "summary": "Creates list of users with given input array",
-        "description": "",
-        "operationId": "createUsersWithArrayInput",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "in": "body",
-            "name": "body",
-            "description": "List of user object",
-            "required": true,
-            "schema": {
-              "type": "array",
-              "items": {
-                "$ref": "#/definitions/User"
-              }
-            }
-          }
-        ],
-        "responses": {
-          "default": {
-            "description": "successful operation"
-          }
-        }
-      }
-    },
-    "/user/createWithList": {
-      "post": {
-        "tags": ["user"],
-        "summary": "Creates list of users with given input array",
-        "description": "",
-        "operationId": "createUsersWithListInput",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "in": "body",
-            "name": "body",
-            "description": "List of user object",
-            "required": true,
-            "schema": {
-              "type": "array",
-              "items": {
-                "$ref": "#/definitions/User"
-              }
-            }
-          }
-        ],
-        "responses": {
-          "default": {
-            "description": "successful operation"
-          }
-        }
-      }
-    },
-    "/user/login": {
-      "get": {
-        "tags": ["user"],
-        "summary": "Logs user into the system",
-        "description": "",
-        "operationId": "loginUser",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "username",
-            "in": "query",
-            "description": "The user name for login",
-            "required": true,
-            "type": "string"
-          },
-          {
-            "name": "password",
-            "in": "query",
-            "description": "The password for login in clear text",
-            "required": true,
-            "type": "string"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "type": "string"
-            },
-            "headers": {
-              "X-Rate-Limit": {
-                "type": "integer",
-                "format": "int32",
-                "description": "calls per hour allowed by the user"
-              },
-              "X-Expires-After": {
-                "type": "string",
-                "format": "date-time",
-                "description": "date in UTC when token expires"
-              }
-            }
-          },
-          "400": {
-            "description": "Invalid username/password supplied"
-          }
-        }
-      }
-    },
-    "/user/logout": {
-      "get": {
-        "tags": ["user"],
-        "summary": "Logs out current logged in user session",
-        "description": "",
-        "operationId": "logoutUser",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [],
-        "responses": {
-          "default": {
-            "description": "successful operation"
-          }
-        }
-      }
-    },
-    "/user/{username}": {
-      "get": {
-        "tags": ["user"],
-        "summary": "Get user by user name",
-        "description": "",
-        "operationId": "getUserByName",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "username",
-            "in": "path",
-            "description": "The name that needs to be fetched. Use user1 for testing. ",
-            "required": true,
-            "type": "string"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "successful operation",
-            "schema": {
-              "$ref": "#/definitions/User"
-            }
-          },
-          "400": {
-            "description": "Invalid username supplied"
-          },
-          "404": {
-            "description": "User not found"
-          }
-        }
-      },
-      "put": {
-        "tags": ["user"],
-        "summary": "Updated user",
-        "description": "This can only be done by the logged in user.",
-        "operationId": "updateUser",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "username",
-            "in": "path",
-            "description": "name that need to be updated",
-            "required": true,
-            "type": "string"
-          },
-          {
-            "in": "body",
-            "name": "body",
-            "description": "Updated user object",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/User"
-            }
-          }
-        ],
-        "responses": {
-          "400": {
-            "description": "Invalid user supplied"
-          },
-          "404": {
-            "description": "User not found"
-          }
-        }
-      },
-      "delete": {
-        "tags": ["user"],
-        "summary": "Delete user",
-        "description": "This can only be done by the logged in user.",
-        "operationId": "deleteUser",
-        "produces": ["application/xml", "application/json"],
-        "parameters": [
-          {
-            "name": "username",
-            "in": "path",
-            "description": "The name that needs to be deleted",
-            "required": true,
-            "type": "string"
-          }
-        ],
-        "responses": {
-          "400": {
-            "description": "Invalid username supplied"
-          },
-          "404": {
-            "description": "User not found"
-          }
-        }
-      }
-    }
-  },
-  "securityDefinitions": {
-    "petstore_auth": {
-      "type": "oauth2",
-      "authorizationUrl": "http://petstore.swagger.io/oauth/dialog",
-      "flow": "implicit",
-      "scopes": {
-        "write:pets": "modify pets in your account",
-        "read:pets": "read your pets"
-      }
-    },
-    "api_key": {
-      "type": "apiKey",
-      "name": "api_key",
-      "in": "header"
-    }
-  },
-  "definitions": {
-    "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": {
-          "$ref": "#/definitions/Category"
-        },
-        "name": {
-          "type": "string",
-          "example": "doggie"
-        },
-        "photoUrls": {
-          "type": "array",
-          "xml": {
-            "name": "photoUrl",
-            "wrapped": true
-          },
-          "items": {
-            "type": "string"
-          }
-        },
-        "tags": {
-          "type": "array",
-          "xml": {
-            "name": "tag",
-            "wrapped": true
-          },
-          "items": {
-            "$ref": "#/definitions/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"
-        }
-      }
-    }
-  },
-  "externalDocs": {
-    "description": "Find out more about Swagger",
-    "url": "http://swagger.io"
-  }
-}
diff --git a/index.ts b/index.ts
index 4348170..d27e4b1 100644
--- a/index.ts
+++ b/index.ts
@@ -22,14 +22,7 @@ declare module '@japa/runner/core' {
 /**
  * Plugin for "@japa/runner"
  */
-export function assert(options?: PluginConfig): PluginFn {
-  if (options?.openApi) {
-    Assert.registerApiSpecs(options.openApi.schemas, {
-      exportCoverage: options.openApi.exportCoverage,
-      reportCoverage: options.openApi.reportCoverage,
-    })
-  }
-
+export function assert(_options?: PluginConfig): PluginFn {
   return function () {
     TestContext.getter('assert', () => new Assert(), true)
     Test.executed(function (test: Test<any>, hasError) {
diff --git a/package.json b/package.json
index 1ba0493..ac6b386 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,6 @@
   "dependencies": {
     "@poppinss/macroable": "^1.0.2",
     "@types/chai": "^4.3.14",
-    "api-contract-validator": "^2.2.8",
     "chai": "^5.1.0"
   },
   "peerDependencies": {
diff --git a/src/assert.ts b/src/assert.ts
index 8d257b7..726fbc6 100644
--- a/src/assert.ts
+++ b/src/assert.ts
@@ -7,10 +7,8 @@
  * file that was distributed with this source code.
  */
 
-import { fileURLToPath } from 'node:url'
 import Macroable from '@poppinss/macroable'
-import { chaiPlugin } from 'api-contract-validator'
-import { assert, Assertion, AssertionError, use, expect } from 'chai'
+import { assert, Assertion, AssertionError } from 'chai'
 
 import { subsetCompare } from './utils.js'
 import type { AssertContract, ChaiAssert } from './types.js'
@@ -27,23 +25,6 @@ import type { AssertContract, ChaiAssert } from './types.js'
  * assert.deepEqual({ id: 1 }, { id: 1 })
  */
 export class Assert extends Macroable implements AssertContract {
-  protected static hasInstalledApiValidator = false
-
-  /**
-   * Register api specs to be used for validating responses
-   */
-  static registerApiSpecs(
-    schemaPathsOrURLs: (string | URL)[],
-    options?: { reportCoverage?: boolean; exportCoverage?: boolean }
-  ) {
-    this.hasInstalledApiValidator = true
-    const paths = schemaPathsOrURLs.map((schemaPathsOrURL) => {
-      return schemaPathsOrURL instanceof URL ? fileURLToPath(schemaPathsOrURL) : schemaPathsOrURL
-    })
-
-    use(chaiPlugin({ apiDefinitionsPath: paths, ...options }))
-  }
-
   /**
    * Tracking assertions
    */
@@ -1534,12 +1515,10 @@ export class Assert extends Macroable implements AssertContract {
    * ) // fails
    */
   notIncludeDeepMembers(
-    ...args: Parameters<ChaiAssert['includeDeepMembers']>
-  ): ReturnType<ChaiAssert['includeDeepMembers']> {
+    ...args: Parameters<ChaiAssert['notIncludeDeepMembers']>
+  ): ReturnType<ChaiAssert['notIncludeDeepMembers']> {
     this.incrementAssertionsCount()
-
-    // @ts-expect-error not in @types/chai
-    return assert['notIncludeDeepMembers'](...args)
+    return assert.notIncludeDeepMembers(...args)
   }
 
   /**
@@ -2173,15 +2152,4 @@ export class Assert extends Macroable implements AssertContract {
    * Use {@link Assert.doesNotReject} without the "s"
    */
   doesNotRejects = this.doesNotReject.bind(this)
-
-  /**
-   * Assert the response confirms to open API spec
-   */
-  isValidApiResponse(response: any) {
-    // @ts-ignore
-    if (!this.constructor['hasInstalledApiValidator']) {
-      throw new Error('Cannot validate responses without defining api schemas')
-    }
-    return expect(response).to.matchApiSchema()
-  }
 }
diff --git a/src/types.ts b/src/types.ts
index f8a1c48..80d18e2 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -74,10 +74,4 @@ export type AssertContract = Omit<
   | 'notDeepOwnInclude'
 >
 
-export type PluginConfig = {
-  openApi?: {
-    schemas: (string | URL)[]
-    reportCoverage?: boolean
-    exportCoverage?: boolean
-  }
-}
+export type PluginConfig = {}
diff --git a/tests/assert/assert.spec.ts b/tests/assert/assert.spec.ts
index 7a48438..1b25252 100644
--- a/tests/assert/assert.spec.ts
+++ b/tests/assert/assert.spec.ts
@@ -2023,19 +2023,19 @@ test.describe('assert', function () {
 
     expectError(function () {
       assert.closeTo([1.5] as any, 1.0, 0.5, 'blah')
-    }, 'blah: expected [ 1.5 ] to be a number')
+    }, 'blah: expected [ 1.5 ] to be numeric')
 
     expectError(function () {
       assert.closeTo(1.5, '1.0' as any, 0.5, 'blah')
-    }, 'blah: the arguments to closeTo or approximately must be numbers')
+    }, "blah: expected '1.0' to be numeric")
 
     expectError(function () {
       assert.closeTo(1.5, 1.0, true as any, 'blah')
-    }, 'blah: the arguments to closeTo or approximately must be numbers')
+    }, 'blah: expected true to be numeric')
 
     expectError(function () {
       assert.closeTo(1.5, 1.0, undefined as any, 'blah')
-    }, 'blah: the arguments to closeTo or approximately must be numbers, and a delta is required')
+    }, 'blah: A `delta` value is required for `closeTo`')
   })
 
   test('approximately', function () {
@@ -2055,19 +2055,19 @@ test.describe('assert', function () {
 
     expectError(function () {
       assert.approximately([1.5] as any, 1.0, 0.5)
-    }, 'expected [ 1.5 ] to be a number')
+    }, 'expected [ 1.5 ] to be numeric')
 
     expectError(function () {
       assert.approximately(1.5, '1.0' as any, 0.5, 'blah')
-    }, 'blah: the arguments to closeTo or approximately must be numbers')
+    }, "blah: expected '1.0' to be numeric")
 
     expectError(function () {
       assert.approximately(1.5, 1.0, true as any, 'blah')
-    }, 'blah: the arguments to closeTo or approximately must be numbers')
+    }, 'blah: expected true to be numeric')
 
     expectError(function () {
       assert.approximately(1.5, 1.0, undefined as any, 'blah')
-    }, 'blah: the arguments to closeTo or approximately must be numbers, and a delta is required')
+    }, 'blah: A `delta` value is required for `closeTo`')
   })
 
   test('sameMembers', function () {
diff --git a/tests/assert/openapi.spec.ts b/tests/assert/openapi.spec.ts
deleted file mode 100644
index 51b8d27..0000000
--- a/tests/assert/openapi.spec.ts
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * @japa/assert
- *
- * (c) Japa.dev
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-import { test } from 'node:test'
-import { Assert } from '../../src/assert.js'
-import { expectError } from '../../tests_helpers/index.js'
-
-Assert.registerApiSpecs([new URL('../../api-spec.json', import.meta.url)])
-
-test.describe('assert | open api', () => {
-  test('pass when response confirms to the api spec', () => {
-    const assert = new Assert()
-
-    assert.isValidApiResponse({
-      path: '/v2/pet/1',
-      method: 'get',
-      status: 200,
-      body: {
-        name: 'Pet 1',
-        photoUrls: ['/a', 'b'],
-      },
-      headers: {},
-    })
-  })
-
-  test('fail when response does not confirms to the api spec', () => {
-    const assert = new Assert()
-
-    expectError(() => {
-      assert.isValidApiResponse({
-        path: '/v2/pet/1',
-        method: 'get',
-        status: 200,
-        body: {},
-        headers: {},
-      })
-    }, 'expected response to match API schema')
-  })
-
-  test('validate error messages response', () => {
-    const assert = new Assert()
-
-    assert.isValidApiResponse({
-      path: '/v2/pet/1',
-      method: 'get',
-      status: 400,
-      body: {
-        message: 'Invalid id',
-      },
-      headers: {},
-    })
-  })
-
-  test('fail when response status code is not in the spec', () => {
-    const assert = new Assert()
-
-    expectError(() => {
-      assert.isValidApiResponse({
-        path: '/v2/pet/1',
-        method: 'get',
-        status: 401,
-        body: {},
-        headers: {},
-      })
-    }, 'schema not found for {"path":"/v2/pet/1","method":"get","status":401}')
-  })
-
-  test('fail when endpoint is not in the spec', () => {
-    const assert = new Assert()
-
-    expectError(() => {
-      assert.isValidApiResponse({
-        path: '/v2/pets/1',
-        method: 'get',
-        status: 200,
-        body: {},
-        headers: {},
-      })
-    }, 'schema not found for {"path":"/v2/pets/1","method":"get","status":200}')
-  })
-
-  test('fail when response headers mis-match', () => {
-    const assert = new Assert()
-
-    expectError(() => {
-      assert.isValidApiResponse({
-        path: '/v2/user/login',
-        method: 'get',
-        status: 200,
-        body: 'dads',
-        headers: {
-          'x-rate-limit': 'abc',
-        },
-      })
-    }, 'expected response to match API schema')
-  })
-})