diff --git a/tests/lib/code-path-analysis/code-path-analyzer.js b/tests/lib/code-path-analysis/code-path-analyzer.js
index 3c5d71db21f..ee603ef47b4 100644
--- a/tests/lib/code-path-analysis/code-path-analyzer.js
+++ b/tests/lib/code-path-analysis/code-path-analyzer.js
@@ -14,7 +14,7 @@ const assert = require("assert"),
     fs = require("fs"),
     path = require("path"),
     Linter = require("../../../lib/linter"),
-    EventGeneratorTester = require("../../../lib/testers/event-generator-tester"),
+    EventGeneratorTester = require("../../../tools/internal-testers/event-generator-tester"),
     debug = require("../../../lib/code-path-analysis/debug-helpers"),
     CodePath = require("../../../lib/code-path-analysis/code-path"),
     CodePathAnalyzer = require("../../../lib/code-path-analysis/code-path-analyzer"),
diff --git a/tests/lib/rules/_set-default-parser.js b/tests/lib/rules/_set-default-parser.js
index 633a3ff6b87..0766407589b 100644
--- a/tests/lib/rules/_set-default-parser.js
+++ b/tests/lib/rules/_set-default-parser.js
@@ -16,5 +16,5 @@ const path = require("path");
 const RuleTester = require("../../../lib/testers/rule-tester");
 
 RuleTester.setDefaultConfig({
-    parser: path.resolve(__dirname, "../../../lib/testers/test-parser")
+    parser: path.resolve(__dirname, "../../../tools/internal-testers/test-parser")
 });
diff --git a/tests/lib/util/node-event-generator.js b/tests/lib/util/node-event-generator.js
index e297b5e4560..b59fabce7ea 100644
--- a/tests/lib/util/node-event-generator.js
+++ b/tests/lib/util/node-event-generator.js
@@ -13,7 +13,7 @@ const assert = require("assert"),
     sinon = require("sinon"),
     espree = require("espree"),
     estraverse = require("estraverse"),
-    EventGeneratorTester = require("../../../lib/testers/event-generator-tester"),
+    EventGeneratorTester = require("../../../tools/internal-testers/event-generator-tester"),
     NodeEventGenerator = require("../../../lib/util/node-event-generator");
 
 //------------------------------------------------------------------------------
diff --git a/lib/testers/event-generator-tester.js b/tools/internal-testers/event-generator-tester.js
similarity index 100%
rename from lib/testers/event-generator-tester.js
rename to tools/internal-testers/event-generator-tester.js
diff --git a/lib/testers/test-parser.js b/tools/internal-testers/test-parser.js
similarity index 95%
rename from lib/testers/test-parser.js
rename to tools/internal-testers/test-parser.js
index e7523f2e610..1ed49a1c529 100644
--- a/lib/testers/test-parser.js
+++ b/tools/internal-testers/test-parser.js
@@ -4,7 +4,7 @@
 "use strict";
 
 const espree = require("espree");
-const Traverser = require("../util/traverser");
+const Traverser = require("../../lib/util/traverser");
 
 /**
  * Define `start`/`end` properties as throwing error.