diff --git a/flavors/swagger-ui-react/index.jsx b/flavors/swagger-ui-react/index.jsx
index 0c5ec434312..43aff411e1b 100644
--- a/flavors/swagger-ui-react/index.jsx
+++ b/flavors/swagger-ui-react/index.jsx
@@ -142,7 +142,7 @@ SwaggerUI.defaultProps = {
   deepLinking: false,
   showExtensions: false,
   showCommonExtensions: false,
-  filter: null,
+  filter: false,
   requestSnippetsEnabled: false,
   requestSnippets: {
     generators: {
@@ -164,7 +164,7 @@ SwaggerUI.defaultProps = {
   },
   tryItOutEnabled: false,
   displayRequestDuration: false,
-  withCredentials: undefined,
+  withCredentials: false,
   persistAuthorization: false,
   oauth2RedirectUrl: undefined,
 }
diff --git a/src/core/components/live-response.jsx b/src/core/components/live-response.jsx
index eb7665a4ea2..38ddcafa6df 100644
--- a/src/core/components/live-response.jsx
+++ b/src/core/components/live-response.jsx
@@ -73,10 +73,10 @@ export default class LiveResponse extends React.Component {
 
     return (
       <div>
-        { curlRequest && (requestSnippetsEnabled === true || requestSnippetsEnabled === "true"
+        { curlRequest && requestSnippetsEnabled 
           ? <RequestSnippets request={ curlRequest }/>
           : <Curl request={ curlRequest } />
-        )}
+        }
         { url && <div>
             <div className="request-url">
               <h4>Request URL</h4>
diff --git a/src/core/components/operation-tag.jsx b/src/core/components/operation-tag.jsx
index 0880c079e82..9f8dcf46e99 100644
--- a/src/core/components/operation-tag.jsx
+++ b/src/core/components/operation-tag.jsx
@@ -47,8 +47,6 @@ export default class OperationTag extends React.Component {
       deepLinking,
     } = getConfigs()
 
-    const isDeepLinkingEnabled = deepLinking && deepLinking !== "false"
-
     const Collapse = getComponent("Collapse")
     const Markdown = getComponent("Markdown", true)
     const DeepLink = getComponent("DeepLink")
@@ -80,7 +78,7 @@ export default class OperationTag extends React.Component {
           data-is-open={showTag}
         >
           <DeepLink
-            enabled={isDeepLinkingEnabled}
+            enabled={deepLinking}
             isShown={showTag}
             path={createDeepLinkPath(tag)}
             text={tag} />
diff --git a/src/core/config/defaults.js b/src/core/config/defaults.js
index aa304ad1784..19c2a0a080b 100644
--- a/src/core/config/defaults.js
+++ b/src/core/config/defaults.js
@@ -11,8 +11,8 @@ const defaultOptions = Object.freeze({
   urls: null,
   layout: "BaseLayout",
   docExpansion: "list",
-  maxDisplayedTags: null,
-  filter: null,
+  maxDisplayedTags: -1,
+  filter: false,
   validatorUrl: "https://validator.swagger.io/validator",
   oauth2RedirectUrl: `${window.location.protocol}//${window.location.host}${window.location.pathname.substring(0, window.location.pathname.lastIndexOf("/"))}/oauth2-redirect.html`,
   persistAuthorization: false,
@@ -30,7 +30,7 @@ const defaultOptions = Object.freeze({
   defaultModelsExpandDepth: 1,
   showExtensions: false,
   showCommonExtensions: false,
-  withCredentials: undefined,
+  withCredentials: false,
   requestSnippetsEnabled: false,
   requestSnippets: {
     generators: {
diff --git a/src/core/config/factorization/store.js b/src/core/config/factorization/store.js
index 9d29c6c4ae1..055aba034e6 100644
--- a/src/core/config/factorization/store.js
+++ b/src/core/config/factorization/store.js
@@ -1,10 +1,10 @@
 /**
  * @prettier
  */
-import merge from "../merge"
+import deepExtend from "deep-extend"
 
 const storeFactorization = (options) => {
-  const state = merge(
+  const state = deepExtend(
     {
       layout: {
         layout: options.layout,
diff --git a/src/core/config/merge.js b/src/core/config/merge.js
index e56304fb885..04d02efaec3 100644
--- a/src/core/config/merge.js
+++ b/src/core/config/merge.js
@@ -7,12 +7,13 @@
  *
  * NOTE1: lodash.merge & lodash.mergeWith prefers to ignore undefined values
  * NOTE2: special handling of `domNode` option is now required as `deep-extend` will corrupt it (lodash.merge handles it correctly)
- * NOTE3: oauth2RedirectUrl and withCredentials options can be set to undefined. By expecting null instead of undefined, we can't use lodash.merge.
+ * NOTE3: oauth2RedirectUrl option can be set to undefined. By expecting null instead of undefined, we can't use lodash.merge.
  * NOTE4: urls.primaryName needs to handled in special way, because it's an arbitrary property on Array instance
  *
  * TODO(vladimir.gorej@gmail.com): remove deep-extend in favor of lodash.merge
  */
 import deepExtend from "deep-extend"
+import typeCast from "./type-cast"
 
 const merge = (target, ...sources) => {
   let domNode = Symbol.for("domNode")
@@ -51,7 +52,7 @@ const merge = (target, ...sources) => {
     merged.urls.primaryName = primaryName
   }
 
-  return merged
+  return typeCast(merged)
 }
 
 export default merge
diff --git a/src/core/config/type-cast/index.js b/src/core/config/type-cast/index.js
new file mode 100644
index 00000000000..608e0312b77
--- /dev/null
+++ b/src/core/config/type-cast/index.js
@@ -0,0 +1,24 @@
+/**
+ * @prettier
+ */
+import has from "lodash/has"
+import get from "lodash/get"
+import set from "lodash/fp/set"
+
+import typeCasters from "./mappings"
+
+const typeCast = (options) => {
+  return Object.entries(typeCasters).reduce(
+    (acc, [optionPath, { typeCaster, defaultValue }]) => {
+      if (has(acc, optionPath)) {
+        const uncasted = get(acc, optionPath)
+        const casted = typeCaster(uncasted, defaultValue)
+        acc = set(optionPath, casted, acc)
+      }
+      return acc
+    },
+    { ...options }
+  )
+}
+
+export default typeCast
diff --git a/src/core/config/type-cast/mappings.js b/src/core/config/type-cast/mappings.js
new file mode 100644
index 00000000000..30ef5e3dfd5
--- /dev/null
+++ b/src/core/config/type-cast/mappings.js
@@ -0,0 +1,115 @@
+/**
+ * @prettier
+ */
+import arrayTypeCaster from "./type-casters/array"
+import booleanTypeCaster from "./type-casters/boolean"
+import domNodeTypeCaster from "./type-casters/dom-node"
+import filterTypeCaster from "./type-casters/filter"
+import nullableArrayTypeCaster from "./type-casters/nullable-array"
+import nullableStringTypeCaster from "./type-casters/nullable-string"
+import numberTypeCaster from "./type-casters/number"
+import objectTypeCaster from "./type-casters/object"
+import stringTypeCaster from "./type-casters/string"
+import syntaxHighlightTypeCaster from "./type-casters/syntax-highlight"
+import undefinedStringTypeCaster from "./type-casters/undefined-string"
+import defaultOptions from "../defaults"
+
+const typeCasters = {
+  configUrl: { typeCaster: stringTypeCaster },
+  deepLinking: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.deepLinking,
+  },
+  defaultModelExpandDepth: {
+    typeCaster: numberTypeCaster,
+    defaultValue: defaultOptions.defaultModelExpandDepth,
+  },
+  defaultModelRendering: { typeCaster: stringTypeCaster },
+  defaultModelsExpandDepth: {
+    typeCaster: numberTypeCaster,
+    defaultValue: defaultOptions.defaultModelsExpandDepth,
+  },
+  displayOperationId: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.displayOperationId,
+  },
+  displayRequestDuration: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.displayRequestDuration,
+  },
+  docExpansion: { typeCaster: stringTypeCaster },
+  dom_id: { typeCaster: nullableStringTypeCaster },
+  domNode: { typeCaster: domNodeTypeCaster },
+  filter: { typeCaster: filterTypeCaster },
+  layout: { typeCaster: stringTypeCaster },
+  maxDisplayedTags: {
+    typeCaster: numberTypeCaster,
+    defaultValue: defaultOptions.maxDisplayedTags,
+  },
+  oauth2RedirectUrl: { typeCaster: undefinedStringTypeCaster },
+  persistAuthorization: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.persistAuthorization,
+  },
+  plugins: {
+    typeCaster: arrayTypeCaster,
+    defaultValue: defaultOptions.plugins,
+  },
+  pluginsOptions: {
+    typeCaster: objectTypeCaster,
+    pluginsOptions: defaultOptions.pluginsOptions,
+  },
+  "pluginsOptions.pluginsLoadType": { typeCaster: stringTypeCaster },
+  presets: {
+    typeCaster: arrayTypeCaster,
+    defaultValue: defaultOptions.presets,
+  },
+  requestSnippets: {
+    typeCaster: objectTypeCaster,
+    defaultValue: defaultOptions.requestSnippets,
+  },
+  requestSnippetsEnabled: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.requestSnippetsEnabled,
+  },
+  showCommonExtensions: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.showCommonExtensions,
+  },
+  showExtensions: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.showExtensions,
+  },
+  showMutatedRequest: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.showMutatedRequest,
+  },
+  spec: { typeCaster: objectTypeCaster, defaultValue: defaultOptions.spec },
+  supportedSubmitMethods: {
+    typeCaster: arrayTypeCaster,
+    defaultValue: defaultOptions.supportedSubmitMethods,
+  },
+  syntaxHighlight: {
+    typeCaster: syntaxHighlightTypeCaster,
+    defaultValue: defaultOptions.syntaxHighlight,
+  },
+  "syntaxHighlight.activated": {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.syntaxHighlight.activated,
+  },
+  "syntaxHighlight.theme": { typeCaster: stringTypeCaster },
+  tryItOutEnabled: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.tryItOutEnabled,
+  },
+  url: { typeCaster: stringTypeCaster },
+  urls: { typeCaster: nullableArrayTypeCaster },
+  "urls.primaryName": { typeCaster: stringTypeCaster },
+  validatorUrl: { typeCaster: nullableStringTypeCaster },
+  withCredentials: {
+    typeCaster: booleanTypeCaster,
+    defaultValue: defaultOptions.withCredentials,
+  },
+}
+
+export default typeCasters
diff --git a/src/core/config/type-cast/type-casters/array.js b/src/core/config/type-cast/type-casters/array.js
new file mode 100644
index 00000000000..d11dafa78fe
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/array.js
@@ -0,0 +1,7 @@
+/**
+ * @prettier
+ */
+const arrayTypeCaster = (value, defaultValue = []) =>
+  Array.isArray(value) ? value : defaultValue
+
+export default arrayTypeCaster
diff --git a/src/core/config/type-cast/type-casters/boolean.js b/src/core/config/type-cast/type-casters/boolean.js
new file mode 100644
index 00000000000..0cc584aad77
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/boolean.js
@@ -0,0 +1,11 @@
+/**
+ * @prettier
+ */
+const booleanTypeCaster = (value, defaultValue = false) =>
+  value === true || value === "true" || value === 1 || value === "1"
+    ? true
+    : value === false || value === "false" || value === 0 || value === "0"
+      ? false
+      : defaultValue
+
+export default booleanTypeCaster
diff --git a/src/core/config/type-cast/type-casters/dom-node.js b/src/core/config/type-cast/type-casters/dom-node.js
new file mode 100644
index 00000000000..4186981bcf5
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/dom-node.js
@@ -0,0 +1,7 @@
+/**
+ * @prettier
+ */
+const domNodeTypeCaster = (value) =>
+  value === null || value === "null" ? null : value
+
+export default domNodeTypeCaster
diff --git a/src/core/config/type-cast/type-casters/filter.js b/src/core/config/type-cast/type-casters/filter.js
new file mode 100644
index 00000000000..e13af3e787a
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/filter.js
@@ -0,0 +1,11 @@
+/**
+ * @prettier
+ */
+import booleanTypeCaster from "./boolean"
+
+const filterTypeCaster = (value) => {
+  const defaultValue = String(value)
+  return booleanTypeCaster(value, defaultValue)
+}
+
+export default filterTypeCaster
diff --git a/src/core/config/type-cast/type-casters/nullable-array.js b/src/core/config/type-cast/type-casters/nullable-array.js
new file mode 100644
index 00000000000..7606fe4c4a6
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/nullable-array.js
@@ -0,0 +1,6 @@
+/**
+ * @prettier
+ */
+const nullableArrayTypeCaster = (value) => (Array.isArray(value) ? value : null)
+
+export default nullableArrayTypeCaster
diff --git a/src/core/config/type-cast/type-casters/nullable-string.js b/src/core/config/type-cast/type-casters/nullable-string.js
new file mode 100644
index 00000000000..f4f0b23f95e
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/nullable-string.js
@@ -0,0 +1,7 @@
+/**
+ * @prettier
+ */
+const nullableStringTypeCaster = (value) =>
+  value === null || value === "null" ? null : String(value)
+
+export default nullableStringTypeCaster
diff --git a/src/core/config/type-cast/type-casters/number.js b/src/core/config/type-cast/type-casters/number.js
new file mode 100644
index 00000000000..7fa17ae17e5
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/number.js
@@ -0,0 +1,9 @@
+/**
+ * @prettier
+ */
+const numberTypeCaster = (value, defaultValue = -1) => {
+  const parsedValue = parseInt(value, 10)
+  return Number.isNaN(parsedValue) ? defaultValue : parsedValue
+}
+
+export default numberTypeCaster
diff --git a/src/core/config/type-cast/type-casters/object.js b/src/core/config/type-cast/type-casters/object.js
new file mode 100644
index 00000000000..f4a4db27e74
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/object.js
@@ -0,0 +1,9 @@
+/**
+ * @prettier
+ */
+import isPlainObject from "lodash/isPlainObject"
+
+const objectTypeCaster = (value, defaultValue = {}) =>
+  isPlainObject(value) ? value : defaultValue
+
+export default objectTypeCaster
diff --git a/src/core/config/type-cast/type-casters/string.js b/src/core/config/type-cast/type-casters/string.js
new file mode 100644
index 00000000000..ed562fd2ea4
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/string.js
@@ -0,0 +1,6 @@
+/**
+ * @prettier
+ */
+const stringTypeCaster = (value) => String(value)
+
+export default stringTypeCaster
diff --git a/src/core/config/type-cast/type-casters/syntax-highlight.js b/src/core/config/type-cast/type-casters/syntax-highlight.js
new file mode 100644
index 00000000000..a4d33c1c5db
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/syntax-highlight.js
@@ -0,0 +1,14 @@
+/**
+ * @prettier
+ */
+import isPlainObject from "lodash/isPlainObject"
+
+const syntaxHighlightTypeCaster = (value, defaultValue) => {
+  return isPlainObject(value)
+    ? value
+    : value === false || value === "false" || value === 0 || value === "0"
+      ? { activated: false }
+      : defaultValue
+}
+
+export default syntaxHighlightTypeCaster
diff --git a/src/core/config/type-cast/type-casters/undefined-string.js b/src/core/config/type-cast/type-casters/undefined-string.js
new file mode 100644
index 00000000000..21ef142d1a7
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/undefined-string.js
@@ -0,0 +1,7 @@
+/**
+ * @prettier
+ */
+const undefinedStringTypeCaster = (value) =>
+  value === undefined || value === "undefined" ? undefined : String(value)
+
+export default undefinedStringTypeCaster
diff --git a/src/core/containers/OperationContainer.jsx b/src/core/containers/OperationContainer.jsx
index 89ce7f51ae1..6efd7dfc2fb 100644
--- a/src/core/containers/OperationContainer.jsx
+++ b/src/core/containers/OperationContainer.jsx
@@ -11,7 +11,7 @@ export default class OperationContainer extends PureComponent {
     const { tryItOutEnabled } = props.getConfigs()
 
     this.state = {
-      tryItOutEnabled: tryItOutEnabled === true || tryItOutEnabled === "true",
+      tryItOutEnabled,
       executeInProgress: false
     }
   }
@@ -61,14 +61,13 @@ export default class OperationContainer extends PureComponent {
     const showSummary = layoutSelectors.showSummary()
     const operationId = op.getIn(["operation", "__originalOperationId"]) || op.getIn(["operation", "operationId"]) || opId(op.get("operation"), props.path, props.method) || op.get("id")
     const isShownKey = ["operations", props.tag, operationId]
-    const isDeepLinkingEnabled = deepLinking && deepLinking !== "false"
     const allowTryItOut = supportedSubmitMethods.indexOf(props.method) >= 0 && (typeof props.allowTryItOut === "undefined" ?
       props.specSelectors.allowTryItOutFor(props.path, props.method) : props.allowTryItOut)
     const security = op.getIn(["operation", "security"]) || props.specSelectors.security()
 
     return {
       operationId,
-      isDeepLinkingEnabled,
+      isDeepLinkingEnabled: deepLinking,
       showSummary,
       displayOperationId,
       displayRequestDuration,
diff --git a/src/core/containers/filter.jsx b/src/core/containers/filter.jsx
index 872297f055e..440b1ac4ad9 100644
--- a/src/core/containers/filter.jsx
+++ b/src/core/containers/filter.jsx
@@ -29,11 +29,11 @@ export default class FilterContainer extends React.Component {
 
     return (
       <div>
-        {filter === null || filter === false || filter === "false" ? null :
+        {filter === false ? null :
           <div className="filter-container">
             <Col className="filter wrapper" mobile={12}>
               <input className={classNames.join(" ")} placeholder="Filter by tag" type="text"
-                     onChange={this.onFilterChange} value={filter === true || filter === "true" ? "" : filter}
+                     onChange={this.onFilterChange} value={typeof filter === "string" ? filter : ""}
                      disabled={isLoading}/>
             </Col>
           </div>
diff --git a/src/core/plugins/layout/spec-extensions/wrap-selector.js b/src/core/plugins/layout/spec-extensions/wrap-selector.js
index 712980179e0..4aed3aa0b3c 100644
--- a/src/core/plugins/layout/spec-extensions/wrap-selector.js
+++ b/src/core/plugins/layout/spec-extensions/wrap-selector.js
@@ -9,12 +9,12 @@ export const taggedOperations = (oriSelector, system) => (state, ...args) => {
   // Filter, if requested
   let filter = layoutSelectors.currentFilter()
   if (filter) {
-    if (filter !== true && filter !== "true" && filter !== "false") {
+    if (filter !== true) {
       taggedOps = fn.opsFilter(taggedOps, filter)
     }
   }
   // Limit to [max] items, if specified
-  if (maxDisplayedTags && !isNaN(maxDisplayedTags) && maxDisplayedTags >= 0) {
+  if (maxDisplayedTags >= 0) {
     taggedOps = taggedOps.slice(0, maxDisplayedTags)
   }
 
diff --git a/src/core/plugins/swagger-client/configs-wrap-actions.js b/src/core/plugins/swagger-client/configs-wrap-actions.js
index 34d0e158af0..99770d6379a 100644
--- a/src/core/plugins/swagger-client/configs-wrap-actions.js
+++ b/src/core/plugins/swagger-client/configs-wrap-actions.js
@@ -2,7 +2,5 @@ export const loaded = (ori, system) => (...args) => {
   ori(...args)
   const value = system.getConfigs().withCredentials
   
-  if(value !== undefined) {
-    system.fn.fetch.withCredentials = typeof value === "string" ? (value === "true") : !!value
-  }
+  system.fn.fetch.withCredentials = value
 }
diff --git a/src/core/plugins/syntax-highlighting/components/SyntaxHighlighter.jsx b/src/core/plugins/syntax-highlighting/components/SyntaxHighlighter.jsx
index 43db2e2a70c..0ca96190937 100644
--- a/src/core/plugins/syntax-highlighting/components/SyntaxHighlighter.jsx
+++ b/src/core/plugins/syntax-highlighting/components/SyntaxHighlighter.jsx
@@ -4,7 +4,6 @@
 import React from "react"
 import PropTypes from "prop-types"
 import ReactSyntaxHighlighter from "react-syntax-highlighter/dist/esm/light"
-import get from "lodash/get"
 
 const SyntaxHighlighter = ({
   language,
@@ -13,8 +12,7 @@ const SyntaxHighlighter = ({
   syntaxHighlighting = {},
   children = "",
 }) => {
-  const configs = getConfigs()
-  const theme = get(configs, "syntaxHighlight.theme")
+  const theme = getConfigs().syntaxHighlight.theme
   const { styles, defaultStyle } = syntaxHighlighting
   const style = styles?.[theme] ?? defaultStyle
 
diff --git a/src/core/plugins/syntax-highlighting/wrap-components/SyntaxHighlighter.jsx b/src/core/plugins/syntax-highlighting/wrap-components/SyntaxHighlighter.jsx
index a9e557209f0..a505d1b8039 100644
--- a/src/core/plugins/syntax-highlighting/wrap-components/SyntaxHighlighter.jsx
+++ b/src/core/plugins/syntax-highlighting/wrap-components/SyntaxHighlighter.jsx
@@ -3,12 +3,10 @@
  */
 import React from "react"
 import PropTypes from "prop-types"
-import get from "lodash/get"
 
 const SyntaxHighlighterWrapper = (Original, system) => {
   const SyntaxHighlighter = ({ renderPlainText, children, ...rest }) => {
-    const configs = system.getConfigs()
-    const canSyntaxHighlight = !!get(configs, "syntaxHighlight.activated")
+    const canSyntaxHighlight = system.getConfigs().syntaxHighlight.activated
     const PlainTextViewer = system.getComponent("PlainTextViewer")
 
     if (!canSyntaxHighlight && typeof renderPlainText === "function") {
diff --git a/test/unit/components/filter.jsx b/test/unit/components/filter.jsx
index 4fd740a7896..caa85f0f4a7 100644
--- a/test/unit/components/filter.jsx
+++ b/test/unit/components/filter.jsx
@@ -30,21 +30,6 @@ describe("<FilterContainer/>", function(){
     expect(renderedColInsideFilter.length).toEqual(1)
   })
 
-  it("does not render FilterContainer if filter is null", function(){
-
-    // Given
-    let props = {...mockedProps}
-    props.layoutSelectors = {...mockedProps.specSelectors}
-    props.layoutSelectors.currentFilter = function() {return null}
-
-    // When
-    let wrapper = mount(<FilterContainer {...props}/>)
-
-    // Then
-    const renderedColInsideFilter = wrapper.find(Col)
-    expect(renderedColInsideFilter.length).toEqual(0)
-  })
-
   it("does not render FilterContainer if filter is false", function(){
 
     // Given
diff --git a/test/unit/core/config/type-cast/index.js b/test/unit/core/config/type-cast/index.js
new file mode 100644
index 00000000000..c233b13fbb7
--- /dev/null
+++ b/test/unit/core/config/type-cast/index.js
@@ -0,0 +1,104 @@
+/**
+ * @prettier
+ */
+import typeCast from "core/config/type-cast"
+
+jest.mock("core/presets/apis", () => {})
+
+describe("typeCast", () => {
+  it("should cast stringified `true` and `false` values to `boolean`", () => {
+    const config = {
+      deepLinking: "true",
+      tryItOutEnabled: "false",
+      withCredentials: "true",
+      filter: "false",
+    }
+
+    const expectedConfig = {
+      deepLinking: true,
+      tryItOutEnabled: false,
+      withCredentials: true,
+      filter: false,
+    }
+
+    expect(typeCast(config)).toStrictEqual(expectedConfig)
+  })
+
+  it("should cast stringified `number` values to `number`", () => {
+    const config = {
+      defaultModelExpandDepth: "5",
+      defaultModelsExpandDepth: "-1",
+      maxDisplayedTags: "1",
+    }
+
+    const expectedConfig = {
+      defaultModelExpandDepth: 5,
+      defaultModelsExpandDepth: -1,
+      maxDisplayedTags: 1,
+    }
+
+    expect(typeCast(config)).toStrictEqual(expectedConfig)
+  })
+
+  it("should cast stringified `null` values to `null`", () => {
+    const config = {
+      validatorUrl: "null",
+    }
+
+    const expectedConfig = {
+      validatorUrl: null,
+    }
+
+    expect(typeCast(config)).toStrictEqual(expectedConfig)
+  })
+
+  it("should cast `string` values to `string`", () => {
+    const config = { defaultModelRendering: "model", filter: "pet" }
+
+    const expectedConfig = { defaultModelRendering: "model", filter: "pet" }
+
+    expect(typeCast(config)).toStrictEqual(expectedConfig)
+  })
+
+  it("should cast stringified values to correct type", () => {
+    const config = {
+      dom_id: "null",
+      oauth2RedirectUrl: "undefined",
+      syntaxHighlight: "false",
+      urls: "null",
+    }
+
+    const expectedConfig = {
+      dom_id: null,
+      oauth2RedirectUrl: undefined,
+      syntaxHighlight: { activated: false },
+      urls: null,
+    }
+
+    expect(typeCast(config)).toStrictEqual(expectedConfig)
+  })
+
+  it("should cast incorrect value types to default value", () => {
+    const config = {
+      deepLinking: "deepLinking",
+      urls: "urls",
+      syntaxHighlight: "syntaxHighlight",
+      spec: "spec",
+      maxDisplayedTags: "null",
+      defaultModelExpandDepth: {},
+      defaultModelsExpandDepth: false,
+    }
+
+    const expectedConfig = {
+      deepLinking: false,
+      urls: null,
+      syntaxHighlight: { activated: true, theme: "agate" },
+      spec: {},
+      maxDisplayedTags: -1,
+      defaultModelExpandDepth: 1,
+      defaultModelsExpandDepth: 1,
+    }
+
+    expect(typeCast(config)).toStrictEqual(expectedConfig)
+  })
+})
diff --git a/test/unit/core/plugins/swagger-js/withCredentials.js b/test/unit/core/plugins/swagger-js/withCredentials.js
index 9153d548f80..ff2487abe6b 100644
--- a/test/unit/core/plugins/swagger-js/withCredentials.js
+++ b/test/unit/core/plugins/swagger-js/withCredentials.js
@@ -49,44 +49,6 @@ describe("swagger-client plugin - withCredentials", () => {
     const loadedFn = loaded(oriExecute, system)
     loadedFn()
 
-    expect(oriExecute.mock.calls.length).toBe(1)
-    expect(system.fn.fetch.withCredentials).toBe(false)
-  })
-
-   it("should allow setting flag to true via config as string", () => {
-    // for query string config
-    const system = {
-      fn: {
-        fetch: jest.fn().mockImplementation(() => Promise.resolve())
-      },
-      getConfigs: () => ({
-        withCredentials: "true"
-      })
-    }
-    const oriExecute = jest.fn()
-
-    const loadedFn = loaded(oriExecute, system)
-    loadedFn()
-
-    expect(oriExecute.mock.calls.length).toBe(1)
-    expect(system.fn.fetch.withCredentials).toBe(true)
-  })
-
-  it("should allow setting flag to false via config as string", () => {
-    // for query string config
-    const system = {
-      fn: {
-        fetch: jest.fn().mockImplementation(() => Promise.resolve())
-      },
-      getConfigs: () => ({
-        withCredentials: "false"
-      })
-    }
-    const oriExecute = jest.fn()
-
-    const loadedFn = loaded(oriExecute, system)
-    loadedFn()
-
     expect(oriExecute.mock.calls.length).toBe(1)
     expect(system.fn.fetch.withCredentials).toBe(false)
   })