diff --git a/test/common/README.md b/test/common/README.md
index b87976f1243d24..39b368ae209189 100644
--- a/test/common/README.md
+++ b/test/common/README.md
@@ -340,11 +340,6 @@ original state after calling [`common.hijackStdOut()`][].
 
 Path to the 'root' directory. either `/` or `c:\\` (windows)
 
-### projectDir
-* [<String>]
-
-Path to the project directory.
-
 ### skip(msg)
 * `msg` [<String>]
 
diff --git a/test/common/index.js b/test/common/index.js
index 57a09cf69f3a3d..b67b2f7b71175a 100644
--- a/test/common/index.js
+++ b/test/common/index.js
@@ -69,7 +69,6 @@ exports.enoughTestCpu = Array.isArray(cpus) &&
                         (cpus.length > 1 || cpus[0].speed > 999);
 
 exports.rootDir = exports.isWindows ? 'c:\\' : '/';
-exports.projectDir = path.resolve(__dirname, '..', '..');
 
 exports.buildType = process.config.target_defaults.default_configuration;
 
diff --git a/test/doctool/test-make-doc.js b/test/doctool/test-make-doc.js
index ad372d7121283d..74845b24446fc6 100644
--- a/test/doctool/test-make-doc.js
+++ b/test/doctool/test-make-doc.js
@@ -11,7 +11,7 @@ const assert = require('assert');
 const fs = require('fs');
 const path = require('path');
 
-const apiPath = path.resolve(common.projectDir, 'out', 'doc', 'api');
+const apiPath = path.resolve(__dirname, '..', '..', 'out', 'doc', 'api');
 const docs = fs.readdirSync(apiPath);
 assert.ok(docs.includes('_toc.html'));