diff --git a/test/test.js b/test/test.js
index 90089cffe1..891f8d0516 100644
--- a/test/test.js
+++ b/test/test.js
@@ -73,20 +73,22 @@ test('stripFinalNewline in sync mode on failure', t => {
 	t.is(stderr, 'foo');
 });
 
+const pathKey = process.platform === 'win32' ? 'Path' : 'PATH';
+
 test('preferLocal: true', async t => {
-	await t.notThrowsAsync(execa('ava', ['--version'], {preferLocal: true, env: {PATH: ''}}));
+	await t.notThrowsAsync(execa('ava', ['--version'], {preferLocal: true, env: {[pathKey]: ''}}));
 });
 
 test('preferLocal: false', async t => {
-	await t.throwsAsync(execa('ava', ['--version'], {preferLocal: false, env: {PATH: ''}}), ENOENT_REGEXP);
+	await t.throwsAsync(execa('ava', ['--version'], {preferLocal: false, env: {[pathKey]: ''}}), ENOENT_REGEXP);
 });
 
 test('preferLocal: undefined', async t => {
-	await t.throwsAsync(execa('ava', ['--version'], {env: {PATH: ''}}), ENOENT_REGEXP);
+	await t.throwsAsync(execa('ava', ['--version'], {env: {[pathKey]: ''}}), ENOENT_REGEXP);
 });
 
 test('localDir option', async t => {
-	const command = process.platform === 'win32' ? 'echo %PATH%' : 'echo $PATH';
+	const command = process.platform === 'win32' ? `echo %${pathKey}%` : `echo $${pathKey}`;
 	const {stdout} = await execa(command, {shell: true, preferLocal: true, localDir: '/test'});
 	const envPaths = stdout.split(path.delimiter).map(envPath =>
 		envPath.replace(/\\/g, '/').replace(/^[^/]+/, '')