diff --git a/.eslintrc.js b/.eslintrc.js
index 6f44cd7f..310c44ea 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -239,7 +239,7 @@ module.exports = {
         {
           files: [
             'packages/puppeteer-core/src/**/*.test.ts',
-            'tools/mochaRunner/src/test.ts',
+            'tools/mocha-runner/src/test.ts',
           ],
           rules: {
             // With the Node.js test runner, `describe` and `it` are technically
diff --git a/.github/workflows/changed-packages.yml b/.github/workflows/changed-packages.yml
index 15044bf1..45ee1476 100644
--- a/.github/workflows/changed-packages.yml
+++ b/.github/workflows/changed-packages.yml
@@ -41,7 +41,7 @@ jobs:
               - 'docker/**'
               - 'test/**'
               - 'test-d/**'
-              - 'tools/mochaRunner/**'
+              - 'tools/mocha-runner/**'
               - '.mocharc.cjs'
               - 'tools/doctest/**'
             website:
diff --git a/docs/contributing.md b/docs/contributing.md
index 4bddec35..6cbcaf18 100644
--- a/docs/contributing.md
+++ b/docs/contributing.md
@@ -107,7 +107,7 @@ Puppeteer uses a custom test runner on top of Mocha that consults the
 [TestExpectations.json](https://github.com/puppeteer/puppeteer/blob/main/test/TestExpectations.json)
 to see if a given test result is expected or not. See more info about the test
 runner in
-[`tools/mochaRunner`](https://github.com/puppeteer/puppeteer/tree/main/tools/mochaRunner).
+[`tools/mocha-runner`](https://github.com/puppeteer/puppeteer/tree/main/tools/mocha-runner).
 
 ### Unit tests
 
@@ -155,7 +155,7 @@ The following is a description of the primary folders in Puppeteer:
 - `test-d` contains type tests using
   [`tsd`](https://github.com/SamVerschueren/tsd).
 - `tools` contains miscellaneous scripts that are used in building and etc.
-- `tools/mochaRunner` - contains the source code for our test runner.
+- `tools/mocha-runner` - contains the source code for our test runner.
 
 ## API guidelines
 
@@ -248,7 +248,7 @@ for details.
 If a test is expected to fail on certain configurations or became flaky, update
 [TestExpectations.json](https://github.com/puppeteer/puppeteer/blob/main/test/TestExpectations.json)
 to reflect that. See more info about TestExpectations.json in
-[`tools/mochaRunner`](https://github.com/puppeteer/puppeteer/tree/main/tools/mochaRunner).
+[`tools/mocha-runner`](https://github.com/puppeteer/puppeteer/tree/main/tools/mocha-runner).
 
 ## API Coverage
 
diff --git a/package.json b/package.json
index 31675a43..694724e9 100644
--- a/package.json
+++ b/package.json
@@ -110,7 +110,7 @@
       ]
     },
     "test": {
-      "command": "cross-env PUPPETEER_DEFERRED_PROMISE_DEBUG_TIMEOUT=20000 node tools/mochaRunner/lib/main.js --min-tests 1003",
+      "command": "cross-env PUPPETEER_DEFERRED_PROMISE_DEBUG_TIMEOUT=20000 node tools/mocha-runner/lib/main.js --min-tests 1003",
       "dependencies": [
         "./test:build"
       ]
diff --git a/test/README.md b/test/README.md
index 1513a1b2..72085ecf 100644
--- a/test/README.md
+++ b/test/README.md
@@ -25,7 +25,7 @@ The best place to look is an existing test to see how they use the helpers.
 
 ## Skipping tests in specific conditions
 
-To skip tests edit the [TestExpectations](https://github.com/puppeteer/puppeteer/blob/main/test/TestExpectations.json) file. See [test runner documentation](https://github.com/puppeteer/puppeteer/tree/main/tools/mochaRunner) for more details.
+To skip tests edit the [TestExpectations](https://github.com/puppeteer/puppeteer/blob/main/test/TestExpectations.json) file. See [test runner documentation](https://github.com/puppeteer/puppeteer/tree/main/tools/mocha-runner) for more details.
 
 ## Running tests
 
diff --git a/test/package.json b/test/package.json
index 8f97ca95..ee07d0f7 100644
--- a/test/package.json
+++ b/test/package.json
@@ -15,7 +15,7 @@
         "../packages/testserver:build"
       ],
       "files": [
-        "../tools/mochaRunner/**",
+        "../tools/mocha-runner/**",
         "src/**"
       ],
       "output": [
diff --git a/test/tsconfig.json b/test/tsconfig.json
index 46d51dda..a5e22137 100644
--- a/test/tsconfig.json
+++ b/test/tsconfig.json
@@ -7,5 +7,5 @@
     "rootDir": "src"
   },
   "include": ["src"],
-  "references": [{"path": "../tools/mochaRunner/tsconfig.json"}]
+  "references": [{"path": "../tools/mocha-runner/tsconfig.json"}]
 }
diff --git a/tools/mochaRunner/README.md b/tools/mocha-runner/README.md
similarity index 98%
rename from tools/mochaRunner/README.md
rename to tools/mocha-runner/README.md
index 1e4398a6..f0107f19 100644
--- a/tools/mochaRunner/README.md
+++ b/tools/mocha-runner/README.md
@@ -6,7 +6,7 @@ It uses `/test/TestSuites.json` and `/test/TestExpectations.json` files to run m
 ## Running tests for Mocha Runner itself.
 
 ```bash
-npm run build && npx c8 node tools/mochaRunner/lib/test.js
+npm run build && npx c8 node tools/mocha-runner/lib/test.js
 ```
 
 ## Running tests using Mocha Runner
diff --git a/tools/mochaRunner/src/interface.ts b/tools/mocha-runner/src/interface.ts
similarity index 100%
rename from tools/mochaRunner/src/interface.ts
rename to tools/mocha-runner/src/interface.ts
diff --git a/tools/mochaRunner/src/main.ts b/tools/mocha-runner/src/main.ts
similarity index 100%
rename from tools/mochaRunner/src/main.ts
rename to tools/mocha-runner/src/main.ts
diff --git a/tools/mochaRunner/src/reporter.ts b/tools/mocha-runner/src/reporter.ts
similarity index 100%
rename from tools/mochaRunner/src/reporter.ts
rename to tools/mocha-runner/src/reporter.ts
diff --git a/tools/mochaRunner/src/test.ts b/tools/mocha-runner/src/test.ts
similarity index 100%
rename from tools/mochaRunner/src/test.ts
rename to tools/mocha-runner/src/test.ts
diff --git a/tools/mochaRunner/src/types.ts b/tools/mocha-runner/src/types.ts
similarity index 98%
rename from tools/mochaRunner/src/types.ts
rename to tools/mocha-runner/src/types.ts
index e270ce3a..360e3c32 100644
--- a/tools/mochaRunner/src/types.ts
+++ b/tools/mocha-runner/src/types.ts
@@ -59,7 +59,7 @@ export interface MochaResults {
   pending: MochaTestResult[];
   passes: MochaTestResult[];
   failures: MochaTestResult[];
-  // Added by mochaRunner.
+  // Added by mocha-runner.
   updates?: RecommendedExpectation[];
   parameters?: string[];
   platform?: string;
diff --git a/tools/mochaRunner/src/utils.ts b/tools/mocha-runner/src/utils.ts
similarity index 100%
rename from tools/mochaRunner/src/utils.ts
rename to tools/mocha-runner/src/utils.ts
diff --git a/tools/mochaRunner/tsconfig.json b/tools/mocha-runner/tsconfig.json
similarity index 100%
rename from tools/mochaRunner/tsconfig.json
rename to tools/mocha-runner/tsconfig.json