diff --git a/docs/developer-guide/rule-testers.md b/docs/developer-guide/rule-testers.md
index 732a23f9b9..7853cb67f2 100644
--- a/docs/developer-guide/rule-testers.md
+++ b/docs/developer-guide/rule-testers.md
@@ -10,8 +10,6 @@ When developing plugins, you can use the following rule testers or create your o
 -   stylelint-test-rule-mocha
 -   stylelint-test-rule-ava
 
-The rule tester used within the stylelint codebase is at `lib/testUtils/testRule.js`. (It is the same as `stylelint-test-rule-tape`.)
-
 ## Using a rule tester
 
 To use the rule tester of your choice, do the following:
diff --git a/lib/testUtils/testRule.js b/lib/testUtils/testRule.js
deleted file mode 100644
index 8650dfc29d..0000000000
--- a/lib/testUtils/testRule.js
+++ /dev/null
@@ -1,20 +0,0 @@
-"use strict"
-
-const createRuleTester = require("./createRuleTester")
-const test = require("tape")
-
-// This code is included here instead of using stylelint-test-rule-tape
-// because tests performs significantly faster this way
-function assertEquality(processCss, context) {
-  const testFn = context.only ? test.only : test
-  testFn(context.caseDescription, t => {
-    t.plan(context.comparisonCount)
-    processCss.then(comparisons => {
-      comparisons.forEach((comparison) => {
-        t.equal(comparison.actual, comparison.expected, comparison.description)
-      })
-    })
-  })
-}
-
-module.exports = createRuleTester(assertEquality)