diff --git a/lib/bcoin/env.js b/lib/bcoin/env.js
index ac638874..86175d04 100644
--- a/lib/bcoin/env.js
+++ b/lib/bcoin/env.js
@@ -99,6 +99,7 @@ function Environment(options) {
   this.lru = require('./lru');
   this.bloom = require('./bloom');
   this.bst = require('./bst');
+  this.lowlevelup = require('./lowlevelup');
 
   this.protocol = require('./protocol')(this);
   this.profiler = require('./profiler')(this);
diff --git a/lib/bcoin/ldb.js b/lib/bcoin/ldb.js
index b54d739e..7f1edadb 100644
--- a/lib/bcoin/ldb.js
+++ b/lib/bcoin/ldb.js
@@ -7,7 +7,7 @@
 
 module.exports = function(bcoin) {
 
-var EventEmitter = require('events').EventEmitter;
+var LowlevelUp = require('./lowlevelup');
 var utils = bcoin.utils;
 var network = bcoin.protocol.network;
 var db = {};
@@ -105,117 +105,12 @@ function repair(options, callback) {
   backend.repair(file, callback);
 }
 
-/**
- * LowlevelUp
- *
- * Extremely low-level version of levelup.
- * The only levelup feature it provides is
- * error-wrapping. It gives a nice recallable
- * `open()` method and event. It assumes ascii
- * keys and binary values.
- *
- * This avoids pulling in extra deps and
- * lowers memory usage.
- */
-
-function LowlevelUp(file, options) {
-  var self = this;
-
-  if (!(this instanceof LowlevelUp))
-    return new LowlevelUp(file, options);
-
-  EventEmitter.call(this);
-
-  this.loaded = false;
-
-  this.db = new options.db(file);
-
-  // Stay as close to the metal as possible.
-  // We want to make calls to C++ directly.
-  while (this.db.db && this.db.db.put && this.db.db !== this.db)
-    this.db = this.db.db;
-
-  this.binding = this.db;
-
-  if (this.db.binding)
-    this.binding = this.db.binding;
-
-  this.binding.open(options, function(err) {
-    if (err)
-      return self.emit('error', err);
-
-    self.loaded = true;
-    self.emit('open');
-  });
-}
-
-utils.inherits(LowlevelUp, EventEmitter);
-
-LowlevelUp.prototype.open = function open(callback) {
-  if (this.loaded)
-    return utils.nextTick(callback);
-
-  this.once('open', callback);
-};
-
-LowlevelUp.prototype.get = function get(key, options, callback) {
-  if (typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  return this.binding.get(key, options, function(err, result) {
-    if (err) {
-      if (err.notFound || /not\s*found/i.test(err.message)) {
-        err.notFound = true;
-        err.type = 'NotFoundError';
-      }
-      return callback(err);
-    }
-    return callback(null, result);
-  });
-};
-
-LowlevelUp.prototype.close = function close(callback) {
-  return this.binding.close(callback);
-};
-
-LowlevelUp.prototype.put = function put(key, value, options, callback) {
-  return this.binding.put(key, value, options, callback);
-};
-
-LowlevelUp.prototype.del = function del(key, options, callback) {
-  return this.binding.del(key, options, callback);
-};
-
-LowlevelUp.prototype.batch = function batch(ops, options, callback) {
-  if (!ops)
-    return this.binding.batch();
-  return this.binding.batch(ops, options, callback);
-};
-
-LowlevelUp.prototype.iterator = function iterator(options) {
-  return this.db.iterator(options);
-};
-
-LowlevelUp.prototype.getProperty = function getProperty(name) {
-  if (!this.binding.getProperty)
-    return null;
-
-  return this.binding.getProperty(name);
-};
-
-LowlevelUp.prototype.approximateSize = function approximateSize(start, end, callback) {
-  return this.binding.approximateSize(start, end, callback);
-};
-
 /**
  * Expose
  */
 
-var exports = ldb;
-exports.LowlevelUp = LowlevelUp;
-exports.destroy = destroy;
-exports.repair = repair;
+ldb.destroy = destroy;
+ldb.repair = repair;
 
-return exports;
+return ldb;
 };
diff --git a/lib/bcoin/lowlevelup.js b/lib/bcoin/lowlevelup.js
new file mode 100644
index 00000000..0d8a0b3e
--- /dev/null
+++ b/lib/bcoin/lowlevelup.js
@@ -0,0 +1,118 @@
+/**
+ * lowlevelup.js - low level levelup
+ * Copyright (c) 2014-2015, Fedor Indutny (MIT License)
+ * Copyright (c) 2014-2016, Christopher Jeffrey (MIT License).
+ * https://github.com/indutny/bcoin
+ */
+
+var utils = require('./utils');
+var EventEmitter = require('events').EventEmitter;
+
+/**
+ * LowlevelUp
+ *
+ * Extremely low-level version of levelup.
+ * The only levelup feature it provides is
+ * error-wrapping. It gives a nice recallable
+ * `open()` method and event. It assumes ascii
+ * keys and binary values.
+ *
+ * This avoids pulling in extra deps and
+ * lowers memory usage.
+ */
+
+function LowlevelUp(file, options) {
+  var self = this;
+
+  if (!(this instanceof LowlevelUp))
+    return new LowlevelUp(file, options);
+
+  EventEmitter.call(this);
+
+  this.loaded = false;
+
+  this.db = new options.db(file);
+
+  // Stay as close to the metal as possible.
+  // We want to make calls to C++ directly.
+  while (this.db.db && this.db.db.put && this.db.db !== this.db)
+    this.db = this.db.db;
+
+  this.binding = this.db;
+
+  if (this.db.binding)
+    this.binding = this.db.binding;
+
+  this.binding.open(options, function(err) {
+    if (err)
+      return self.emit('error', err);
+
+    self.loaded = true;
+    self.emit('open');
+  });
+}
+
+utils.inherits(LowlevelUp, EventEmitter);
+
+LowlevelUp.prototype.open = function open(callback) {
+  if (this.loaded)
+    return utils.nextTick(callback);
+
+  this.once('open', callback);
+};
+
+LowlevelUp.prototype.get = function get(key, options, callback) {
+  if (typeof options === 'function') {
+    callback = options;
+    options = {};
+  }
+  return this.binding.get(key, options, function(err, result) {
+    if (err) {
+      if (err.notFound || /not\s*found/i.test(err.message)) {
+        err.notFound = true;
+        err.type = 'NotFoundError';
+      }
+      return callback(err);
+    }
+    return callback(null, result);
+  });
+};
+
+LowlevelUp.prototype.close = function close(callback) {
+  return this.binding.close(callback);
+};
+
+LowlevelUp.prototype.put = function put(key, value, options, callback) {
+  return this.binding.put(key, value, options, callback);
+};
+
+LowlevelUp.prototype.del = function del(key, options, callback) {
+  return this.binding.del(key, options, callback);
+};
+
+LowlevelUp.prototype.batch = function batch(ops, options, callback) {
+  if (!ops)
+    return this.binding.batch();
+  return this.binding.batch(ops, options, callback);
+};
+
+LowlevelUp.prototype.iterator = function iterator(options) {
+  return this.db.iterator(options);
+};
+
+LowlevelUp.prototype.getProperty = function getProperty(name) {
+  if (!this.binding.getProperty)
+    return null;
+
+  return this.binding.getProperty(name);
+};
+
+LowlevelUp.prototype.approximateSize = function approximateSize(start, end, callback) {
+  return this.binding.approximateSize(start, end, callback);
+};
+
+/**
+ * Expose
+ */
+
+module.exports = LowlevelUp;
diff --git a/test/wallet-test.js b/test/wallet-test.js
index b7eda7d1..5a63ea3c 100644
--- a/test/wallet-test.js
+++ b/test/wallet-test.js
@@ -1,5 +1,5 @@
 var bn = require('bn.js');
-var bcoin = require('../')({ db: 'memory' });
+var bcoin = require('../')({ db: process.env.BCOIN_TEST_DB || 'memory' });
 var constants = bcoin.protocol.constants;
 var utils = bcoin.utils;
 var assert = utils.assert;