diff --git a/.jshintrc b/.jshintrc
deleted file mode 100644
index 81cea2a..0000000
--- a/.jshintrc
+++ /dev/null
@@ -1,17 +0,0 @@
-{
-    "node": true,
-    "esnext": true,
-    "bitwise": true,
-    "camelcase": true,
-    "curly": true,
-    "eqeqeq": true,
-    "immed": true,
-    "latedef": true,
-    "newcap": true,
-    "noarg": true,
-    "quotmark": "single",
-    "regexp": true,
-    "undef": true,
-    "unused": true,
-    "strict": true
-}
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..3acd86e
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,8 @@
+.editorconfig
+.eslintrc
+.gitignore
+.npmignore
+.travis.yml
+node_modules/
+npm-debug.log
+test/
diff --git a/.travis.yml b/.travis.yml
index e8aa5e2..c97c0bd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 sudo: false
 language: node_js
 node_js:
-  - stable
-  - lts/*
-  - 6
+  - "12"
+  - "10"
+  - "8"
+  - "6"
diff --git a/README.md b/README.md
index 47b95c8..8e30ff0 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # gulp-jsonlint [![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Dependency Status][depstat-image]][depstat-url]
 
-> jsonlint plugin for [gulp](http://gulpjs.com/)
+> [JSON]/[JSON5] file syntax validation plugin for [`gulp`] using [`jsonlint`]
 
 ## Usage
 
@@ -39,7 +39,45 @@ gulp.src('./src/*.json')
 
 ### jsonlint(options)
 
-For now, `options` are not supported yet.
+Options can be passed as keys in an object to the `jsonlint` function. The following are their defaults:
+
+    jsonlint({
+        // parsing
+        mode: 'json',
+        ignoreComments: false,
+        ignoreTrailingCommas: false,
+        allowSingleQuotedStrings: false,
+        allowDuplicateObjectKeys: true,
+        // formatting
+        format: false,
+        indent: 2,
+        sortKeys: false
+    })
+
+* `mode`, when set to "cjson" or "json5", enables some other flags automatically
+* `ignoreComments`, when `true` JavaScript-style single-line and multiple-line comments will be recognised and ignored
+* `ignoreTrailingCommas`, when `true` trailing commas in objects and arrays will be ignored
+* `allowSingleQuotedStrings`, when `true` single quotes will be accepted as alternative delimiters for strings
+* `allowDuplicateObjectKeys`, when `false` duplicate keys in objects will be reported as an error
+
+* `format`, when `true` `JSON.stringify` will be used to format the JavaScript (if it is valid)
+* `indent`, the value passed to `JSON.stringify`, it can be the number of spaces, or string like "\t"
+* `sortKeys`, when `true` keys of objects in the output JSON will be sorted alphabetically (`format` has to be set to `true` too)
+
+#### Schema Validation
+
+You can validate JSON files using JSON Schema drafts 04, 06 or 07, if you specify the schema in addition to other options:
+
+    jsonlint({
+      schema: {
+        src: 'some/manifest-schema.json',
+        environment: 'json-schema-draft-04'
+      }
+    })
+
+* `schema`, when set the source file will be validated using ae JSON Schema in addition to the syntax checks
+* `src`, when filled with a file path, the file will be used as a source of the JSON Schema
+* `environment`, can specify the version of the JSON Schema draft to use for validation: "json-schema-draft-04", "json-schema-draft-06" or "json-schema-draft-07" (if not set, the schema draft version will be inferred automatically)
 
 ### jsonlint.reporter(customReporter)
 
@@ -75,7 +113,7 @@ Stop a task/stream if an jsonlint error has been reported for any file, but wait
 
 ## License
 
-[MIT License](http://en.wikipedia.org/wiki/MIT_License)
+[MIT License]
 
 [npm-url]: https://npmjs.org/package/gulp-jsonlint
 [npm-image]: https://badge.fury.io/js/gulp-jsonlint.svg
@@ -85,3 +123,10 @@ Stop a task/stream if an jsonlint error has been reported for any file, but wait
 
 [depstat-url]: https://david-dm.org/rogeriopvl/gulp-jsonlint
 [depstat-image]: https://david-dm.org/rogeriopvl/gulp-jsonlint.svg
+
+[MIT License]: http://en.wikipedia.org/wiki/MIT_License
+[`gulp`]: http://gulpjs.com/
+[`jsonlint`]: https://prantlf.github.io/jsonlint/
+[JSON]: https://tools.ietf.org/html/rfc8259
+[JSON5]: https://spec.json5.org
+[JSON Schema]: https://json-schema.org
diff --git a/index.js b/index.js
index a07a004..ad831c7 100644
--- a/index.js
+++ b/index.js
@@ -1,38 +1,118 @@
 'use strict'
 
+var fs = require('fs')
 var mapStream = require('map-stream')
 var colors = require('ansi-colors')
-var jsonlint = require('jsonlint')
+var jsonlint = require('@prantlf/jsonlint')
+var validator = require('@prantlf/jsonlint/lib/validator')
+var sorter = require('@prantlf/jsonlint/lib/sorter')
 var through = require('through2')
 var PluginError = require('plugin-error')
 var log = require('fancy-log')
 
-var formatOutput = function(msg) {
-  var output = {}
-
-  if (msg) {
-    output.message = msg
+var jsonLintPlugin = function(options) {
+  options = Object.assign(
+    {
+      mode: 'json',
+      ignoreComments: false,
+      ignoreTrailingCommas: false,
+      allowSingleQuotedStrings: false,
+      allowDuplicateObjectKeys: true,
+      schema: {},
+      format: false,
+      indent: 2,
+      sortKeys: false
+    },
+    options
+  )
+  var schema = options.schema
+  var parserOptions = {
+    mode: options.mode,
+    ignoreComments:
+      options.ignoreComments ||
+      options.cjson ||
+      options.mode === 'cjson' ||
+      options.mode === 'json5',
+    ignoreTrailingCommas:
+      options.ignoreTrailingCommas || options.mode === 'json5',
+    allowSingleQuotedStrings:
+      options.allowSingleQuotedStrings || options.mode === 'json5',
+    allowDuplicateObjectKeys: options.allowDuplicateObjectKeys,
+    environment: schema.environment,
+    limitedErrorInfo: !(
+      options.ignoreComments ||
+      options.cjson ||
+      options.allowSingleQuotedStrings
+    )
+  }
+  var schemaContent
+
+  function createResult(message) {
+    var result = {}
+    if (message) {
+      result.message = message
+      result.success = false
+    } else {
+      result.success = true
+    }
+    return result
   }
 
-  output.success = msg ? false : true
+  function formatOutput(parsedData, file) {
+    if (options.format) {
+      if (options.sortKeys) {
+        parsedData = sorter.sortObject(parsedData)
+      }
+      var formatted = JSON.stringify(parsedData, null, options.indent) + '\n'
+      file.contents = new Buffer(formatted)
+    }
+  }
 
-  return output
-}
+  function validateSchema(parsedData, file, finish) {
+    var errorMessage
+    try {
+      var validate = validator.compile(schemaContent, parserOptions)
+      validate(parsedData)
+      formatOutput(parsedData, file)
+    } catch (error) {
+      errorMessage = error.message
+    }
+    finish(errorMessage)
+  }
 
-var jsonLintPlugin = function(options) {
-  options = options || {}
+  function loadAndValidateSchema(parsedData, file, finish) {
+    if (schemaContent) {
+      validateSchema(parsedData, finish)
+    } else {
+      fs.readFile(schema.src, 'utf-8', function(error, fileContent) {
+        if (error) {
+          finish(error.message)
+        } else {
+          schemaContent = fileContent
+          validateSchema(parsedData, file, finish)
+        }
+      })
+    }
+  }
 
   return mapStream(function(file, cb) {
-    var errorMessage = ''
+    var errorMessage
+    function finish(errorMessage) {
+      file.jsonlint = createResult(errorMessage)
+      cb(null, file)
+    }
 
     try {
-      jsonlint.parse(String(file.contents))
-    } catch (err) {
-      errorMessage = err.message
+      var parsedData = jsonlint.parse(String(file.contents), parserOptions)
+      if (schema.src) {
+        loadAndValidateSchema(parsedData, file, finish)
+        return
+      }
+      formatOutput(parsedData, file)
+    } catch (error) {
+      errorMessage = error.message
     }
-    file.jsonlint = formatOutput(errorMessage)
-
-    cb(null, file)
+    finish(errorMessage)
   })
 }
 
diff --git a/package-lock.json b/package-lock.json
index 577f938..3c0ddca 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,43 +22,16 @@
         "chalk": "^2.0.0",
         "esutils": "^2.0.2",
         "js-tokens": "^4.0.0"
-      },
-      "dependencies": {
-        "ansi-styles": {
-          "version": "3.2.1",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
-          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
-          "dev": true,
-          "requires": {
-            "color-convert": "^1.9.0"
-          }
-        },
-        "chalk": {
-          "version": "2.4.2",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
-          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
-          "dev": true,
-          "requires": {
-            "ansi-styles": "^3.2.1",
-            "escape-string-regexp": "^1.0.5",
-            "supports-color": "^5.3.0"
-          }
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
       }
     },
-    "JSV": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/JSV/-/JSV-4.0.2.tgz",
-      "integrity": "sha1-0Hf2glVx+CEy+d/67Vh7QCn+/1c="
+    "@prantlf/jsonlint": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@prantlf/jsonlint/-/jsonlint-7.0.0.tgz",
+      "integrity": "sha512-vlPZH9HzSiEXWtN8USQJ0xjkgeaHR/b+DNFc5kfEpoTmQC9jsrQjaazYo/d0d02clJOPK5oFyTJRQFL4rOUvsg==",
+      "requires": {
+        "ajv": "6.10.0",
+        "commander": "2.20.0"
+      }
     },
     "acorn": {
       "version": "6.1.1",
@@ -76,7 +49,6 @@
       "version": "6.10.0",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
       "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
-      "dev": true,
       "requires": {
         "fast-deep-equal": "^2.0.1",
         "fast-json-stable-stringify": "^2.0.0",
@@ -85,9 +57,9 @@
       }
     },
     "ansi-colors": {
-      "version": "3.2.3",
-      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.3.tgz",
-      "integrity": "sha512-LEHHyuhlPY3TmuUYMh2oz89lTShfvgbmzaBcxve9t/9Wuy7Dwf4yoAKcND7KFT1HAQfqZ12qtc+DUrBMeKF9nw=="
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.4.tgz",
+      "integrity": "sha512-hHUXGagefjN2iRrID63xckIvotOXOojhQKWIPUZ4mNUZ9nLZW+7FMNoE1lOkEhNWYsx/7ysGIuJYCiMAA9FnrA=="
     },
     "ansi-escapes": {
       "version": "3.2.0",
@@ -110,9 +82,13 @@
       "dev": true
     },
     "ansi-styles": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-1.0.0.tgz",
-      "integrity": "sha1-yxAt8cVvUSPquLZ817mAJ6AnkXg="
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "dev": true,
+      "requires": {
+        "color-convert": "^1.9.0"
+      }
     },
     "ansi-wrap": {
       "version": "0.1.0",
@@ -133,12 +109,6 @@
       "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
       "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA="
     },
-    "arr-flatten": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
-      "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==",
-      "dev": true
-    },
     "arr-union": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
@@ -154,12 +124,6 @@
         "es-abstract": "^1.7.0"
       }
     },
-    "array-unique": {
-      "version": "0.3.2",
-      "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
-      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
-      "dev": true
-    },
     "assign-symbols": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
@@ -171,73 +135,12 @@
       "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
       "dev": true
     },
-    "atob": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
-      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==",
-      "dev": true
-    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
       "dev": true
     },
-    "base": {
-      "version": "0.11.2",
-      "resolved": "https://registry.npmjs.org/base/-/base-0.11.2.tgz",
-      "integrity": "sha512-5T6P4xPgpp0YDFvSWwEZ4NoE3aM4QBQXDzmVbraCkFj8zHM+mba8SyqB5DbZWyR7mYHo6Y7BdQo3MoA4m0TeQg==",
-      "dev": true,
-      "requires": {
-        "cache-base": "^1.0.1",
-        "class-utils": "^0.3.5",
-        "component-emitter": "^1.2.1",
-        "define-property": "^1.0.0",
-        "isobject": "^3.0.1",
-        "mixin-deep": "^1.2.0",
-        "pascalcase": "^0.1.1"
-      },
-      "dependencies": {
-        "define-property": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/define-property/-/define-property-1.0.0.tgz",
-          "integrity": "sha1-dp66rz9KY6rTr56NMEybvnm/sOY=",
-          "dev": true,
-          "requires": {
-            "is-descriptor": "^1.0.0"
-          }
-        },
-        "is-accessor-descriptor": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-1.0.0.tgz",
-          "integrity": "sha512-m5hnHTkcVsPfqx3AKlyttIPb7J+XykHvJP2B9bZDjlhLIoEq4XoK64Vg7boZlVWYK6LUY94dYPEE7Lh0ZkZKcQ==",
-          "dev": true,
-          "requires": {
-            "kind-of": "^6.0.0"
-          }
-        },
-        "is-data-descriptor": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz",
-          "integrity": "sha512-jbRXy1FmtAoCjQkVmIVYwuuqDFUbaOeDjmed1tOGPrsMhtJA4rD9tkgA0F1qJ3gRFRXcHYVkdeaP50Q5rE/jLQ==",
-          "dev": true,
-          "requires": {
-            "kind-of": "^6.0.0"
-          }
-        },
-        "is-descriptor": {
-          "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/is-descriptor/-/is-descriptor-1.0.2.tgz",
-          "integrity": "sha512-2eis5WqQGV7peooDyLmNEPUrps9+SXX5c9pL3xEB+4e9HnGuDa7mB7kHxHw4CbqS9k1T2hOH3miL8n8WtiYVtg==",
-          "dev": true,
-          "requires": {
-            "is-accessor-descriptor": "^1.0.0",
-            "is-data-descriptor": "^1.0.0",
-            "kind-of": "^6.0.2"
-          }
-        }
-      }
-    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -248,64 +151,12 @@
         "concat-map": "0.0.1"
       }
     },
-    "braces": {
-      "version": "2.3.2",
-      "resolved": "https://registry.npmjs.org/braces/-/braces-2.3.2.tgz",
-      "integrity": "sha512-aNdbnj9P8PjdXU4ybaWLK2IF3jc/EoDYbC7AazW6to3TRsfXxscC9UXOB5iDiEQrkyIbWp2SLQda4+QAa7nc3w==",
-      "dev": true,
-      "requires": {
-        "arr-flatten": "^1.1.0",
-        "array-unique": "^0.3.2",
-        "extend-shallow": "^2.0.1",
-        "fill-range": "^4.0.0",
-        "isobject": "^3.0.1",
-        "repeat-element": "^1.1.2",
-        "snapdragon": "^0.8.1",
-        "snapdragon-node": "^2.0.1",
-        "split-string": "^3.0.2",
-        "to-regex": "^3.0.1"
-      },
-      "dependencies": {
-        "extend-shallow": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
-          "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
-          "dev": true,
-          "requires": {
-            "is-extendable": "^0.1.0"
-          }
-        },
-        "is-extendable": {
-          "version": "0.1.1",
-          "resolved": "https://registry.npmjs.org/is-extendable/-/is-extendable-0.1.1.tgz",
-          "integrity": "sha1-YrEQ4omkcUGOPsNqYX1HLjAd/Ik=",
-          "dev": true
-        }
-      }
-    },
     "browser-stdout": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
       "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
       "dev": true
     },
-    "cache-base": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/cache-base/-/cache-base-1.0.1.tgz",
-      "integrity": "sha512-AKcdTnFSWATd5/GCPRxr2ChwIJ85CeyrEyjRHlKxQ56d4XJMGym0uAiKn0xbLOGOl3+yRpOTi484dVCEc5AUzQ==",
-      "dev": true,
-      "requires": {
-        "collection-visit": "^1.0.0",
-        "component-emitter": "^1.2.1",
-        "get-value": "^2.0.6",
-        "has-value": "^1.0.0",
-        "isobject": "^3.0.1",
-        "set-value": "^2.0.0",
-        "to-object-path": "^0.3.0",
-        "union-value": "^1.0.0",
-        "unset-value": "^1.0.0"
-      }
-    },
     "callsites": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
@@ -313,50 +164,39 @@
       "dev": true
     },
     "camelcase": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.0.0.tgz",
-      "integrity": "sha512-faqwZqnWxbxn+F1d399ygeamQNy3lPp/H9H6rNrqYh4FSVCtcY+3cub1MxA8o9mDd55mM8Aghuu/kuyYA6VTsA==",
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+      "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
       "dev": true
     },
     "chalk": {
-      "version": "0.4.0",
-      "resolved": "http://registry.npmjs.org/chalk/-/chalk-0.4.0.tgz",
-      "integrity": "sha1-UZmj3c0MHv4jvAjBsCewYXbgxk8=",
-      "requires": {
-        "ansi-styles": "~1.0.0",
-        "has-color": "~0.1.0",
-        "strip-ansi": "~0.1.0"
-      }
-    },
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@@ -3572,6 +2338,50 @@
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+          "dev": true,
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diff --git a/package.json b/package.json
index 639a3a6..f498378 100644
--- a/package.json
+++ b/package.json
@@ -30,12 +30,12 @@
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-    "jsonlint": "1.6.3",
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-    "through2": "^3.0.0"
+    "through2": "3.0.1"
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@@ -44,14 +44,13 @@
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+    "mocha": "6.1.4",
     "prettier": "^1.18.2",
     "should": "13.2.3",
-    "vinyl": "^2.2.0"
+    "vinyl": "2.2.0"
   },
   "engines": {
-    "node": ">= 4",
-    "npm": ">=1.2.10"
+    "node": ">=6"
   },
   "licenses": [
     {
diff --git a/test/fixtures/comments.json b/test/fixtures/comments.json
new file mode 100644
index 0000000..dc761b1
--- /dev/null
+++ b/test/fixtures/comments.json
@@ -0,0 +1,6 @@
+/* Commented configuration */
+{
+    "key2": 2,
+    // String parameter
+    "key1": 1
+}
diff --git a/test/fixtures/data.json b/test/fixtures/data.json
new file mode 100644
index 0000000..21da3b2
--- /dev/null
+++ b/test/fixtures/data.json
@@ -0,0 +1,3 @@
+{
+    "key": "value"
+}
diff --git a/test/fixtures/duplicate-object-keys.json b/test/fixtures/duplicate-object-keys.json
new file mode 100644
index 0000000..13b7ad4
--- /dev/null
+++ b/test/fixtures/duplicate-object-keys.json
@@ -0,0 +1,4 @@
+{
+    "key": "value",
+    "key": 123
+}
diff --git a/test/fixtures/json5.json b/test/fixtures/json5.json
new file mode 100644
index 0000000..29ad04a
--- /dev/null
+++ b/test/fixtures/json5.json
@@ -0,0 +1,4 @@
+{
+    // String parameter
+    "key": 'value',
+}
diff --git a/test/fixtures/schema.json b/test/fixtures/schema.json
new file mode 100644
index 0000000..b82365a
--- /dev/null
+++ b/test/fixtures/schema.json
@@ -0,0 +1,14 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
+  "title": "Schema for data.json",
+  "properties": {
+    "key": {
+      "type": "string",
+      "title": "Required property"
+    }
+  },
+  "required": [
+    "key"
+  ]
+}
diff --git a/test/fixtures/single-quotes.json b/test/fixtures/single-quotes.json
new file mode 100644
index 0000000..659e36d
--- /dev/null
+++ b/test/fixtures/single-quotes.json
@@ -0,0 +1,3 @@
+{
+    'key1': 'value'
+}
diff --git a/test/fixtures/trailing-commas.json b/test/fixtures/trailing-commas.json
new file mode 100644
index 0000000..8de42f2
--- /dev/null
+++ b/test/fixtures/trailing-commas.json
@@ -0,0 +1,3 @@
+{
+    "key": "value",
+}
diff --git a/test/main.js b/test/main.js
index 5a07512..56593bd 100644
--- a/test/main.js
+++ b/test/main.js
@@ -21,6 +21,49 @@ var getFile = function(filePath) {
   })
 }
 
+function parseValidFile(filePath, done, options) {
+  var file = getFile(filePath)
+  var stream = jsonLintPlugin(options)
+
+  stream.on('data', function(f) {
+    should.exist(f.jsonlint.success)
+    f.jsonlint.success.should.equal(true)
+  })
+
+  stream.once('end', done)
+  stream.write(file)
+  stream.end()
+}
+
+function parseInvalidFile(filePath, done, options) {
+  var file = getFile(filePath)
+  var stream = jsonLintPlugin(options)
+
+  stream.on('data', function(f) {
+    should.exist(f.jsonlint.success)
+    f.jsonlint.success.should.equal(false)
+  })
+
+  stream.once('end', done)
+  stream.write(file)
+  stream.end()
+}
+
+function formatValidFile(filePath, done, options, newContent) {
+  var file = getFile(filePath)
+  var stream = jsonLintPlugin(options)
+
+  stream.on('data', function(f) {
+    should.exist(f)
+    should.exist(f.contents)
+    String(f.contents).should.equal(newContent + '\n')
+  })
+
+  stream.once('end', done)
+  stream.write(file)
+  stream.end()
+}
+
 describe('gulp-jsonlint', function() {
   it('should pass file through', function(done) {
     var cbCounter = 0
@@ -104,7 +147,6 @@ describe('gulp-jsonlint', function() {
     stream.on('data', function() {
       ++cbCounter
     })
-
     stream.once('end', function() {
       cbCounter.should.equal(2)
       done()
@@ -114,4 +156,98 @@ describe('gulp-jsonlint', function() {
     stream.write(file2)
     stream.end()
   })
+
+  it('supports option for ignoring comments', function(done) {
+    parseValidFile('fixtures/comments.json', done, {
+      ignoreComments: true
+    })
+  })
+
+  it('supports option for ignoring trailing commas', function(done) {
+    parseValidFile('fixtures/trailing-commas.json', done, {
+      ignoreTrailingCommas: true
+    })
+  })
+
+  it('supports option for allowing single-quoted strings', function(done) {
+    parseValidFile('fixtures/single-quotes.json', done, {
+      allowSingleQuotedStrings: true
+    })
+  })
+
+  it('does not report duplicate object keys as an error by default', function(done) {
+    parseValidFile('fixtures/duplicate-object-keys.json', done)
+  })
+
+  it('supports option for disallowing single-quoted strings', function(done) {
+    parseInvalidFile('fixtures/duplicate-object-keys.json', done, {
+      allowDuplicateObjectKeys: false
+    })
+  })
+
+  it('ignores comments in the "cjson" mode', function(done) {
+    parseValidFile('fixtures/comments.json', done, {
+      mode: 'cjson'
+    })
+  })
+
+  it('accepts JSON5 format in the "json5" mode', function(done) {
+    parseValidFile('fixtures/json5.json', done, {
+      mode: 'json5'
+    })
+  })
+
+  it('succeeds validation using JSON Schema', function(done) {
+    parseValidFile('fixtures/data.json', done, {
+      schema: {
+        src: 'test/fixtures/schema.json'
+      }
+    })
+  })
+
+  it('fails validation using JSON Schema', function(done) {
+    var file = getFile('fixtures/valid.json')
+    var stream = jsonLintPlugin({
+      schema: {
+        src: 'test/fixtures/schema.json'
+      }
+    })
+
+    stream.on('data', function(f) {
+      should.exist(f.jsonlint.success)
+      f.jsonlint.success.should.equal(false)
+      should.exist(f.jsonlint.message)
+      f.jsonlint.message.should.match(/should have required property/)
+    })
+
+    stream.once('end', done)
+    stream.write(file)
+    stream.end()
+  })
+
+  it('can format the output', function(done) {
+    formatValidFile(
+      'fixtures/json5.json',
+      done,
+      {
+        mode: 'json5',
+        format: true
+      },
+      '{\n  "key": "value"\n}'
+    )
+  })
+
+  it('can sort object keys in the output', function(done) {
+    formatValidFile(
+      'fixtures/comments.json',
+      done,
+      {
+        ignoreComments: true,
+        format: true,
+        indent: 0,
+        sortKeys: true
+      },
+      '{"key1":1,"key2":2}'
+    )
+  })
 })