diff --git a/test/blockstore-test.js b/test/blockstore-test.js
index 048c438b..39a777dc 100644
--- a/test/blockstore-test.js
+++ b/test/blockstore-test.js
@@ -9,7 +9,7 @@ const assert = require('./util/assert');
 const common = require('./util/common');
 const {resolve} = require('path');
 const fs = require('bfile');
-const {rimraf} = require('./util/common');
+const {rimraf, testdir} = require('./util/common');
 const random = require('bcrypto/lib/random');
 
 const vectors = [
@@ -618,7 +618,7 @@ describe('BlockStore', function() {
   });
 
   describe('FileBlockStore (Integration 1)', function() {
-    const location = '/tmp/bcoin-blockstore-test';
+    const location = testdir('blockstore');
     let store = null;
 
     beforeEach(async () => {
@@ -948,7 +948,7 @@ describe('BlockStore', function() {
   });
 
   describe('FileBlockStore (Integration 2)', function() {
-    const location = '/tmp/bcoin-blockstore-test';
+    const location = testdir('blockstore');
     let store = null;
 
     beforeEach(async () => {
@@ -1101,7 +1101,7 @@ describe('BlockStore', function() {
   });
 
   describe('LevelBlockStore', function() {
-    const location = '/tmp/bcoin-blockstore-test';
+    const location = testdir('blockstore');
     let store = null;
 
     beforeEach(async () => {
diff --git a/test/util/common.js b/test/util/common.js
index bdaa8620..39177fc5 100644
--- a/test/util/common.js
+++ b/test/util/common.js
@@ -1,9 +1,11 @@
 'use strict';
 
 const assert = require('assert');
+const {tmpdir} = require('os');
 const path = require('path');
 const fs = require('bfile');
 const bio = require('bufio');
+const {randomBytes} = require('bcrypto/lib/random');
 const Block = require('../../lib/primitives/block');
 const MerkleBlock = require('../../lib/primitives/merkleblock');
 const Headers = require('../../lib/primitives/headers');
@@ -85,8 +87,15 @@ common.writeTX = function writeTX(name, tx, view) {
   common.writeFile(`${name}-undo.raw`, undoRaw);
 };
 
+common.testdir = function(name) {
+  assert(/^[a-z]+$/.test(name), 'Invalid name');
+
+  const uniq = randomBytes(4).toString('hex');
+  return path.join(tmpdir(), `bcoin-test-${name}-${uniq}`);
+};
+
 common.rimraf = async function(p) {
-  const allowed = new RegExp('^\/tmp\/(.*)$');
+  const allowed = /bcoin\-test\-[a-z]+\-[a-f0-9]{8}(\/[a-z]+)?$/;
   if (!allowed.test(p))
     throw new Error(`Path not allowed: ${p}.`);