diff --git a/test/chain-test.js b/test/chain-test.js
index 727c8ba3..bb364d19 100644
--- a/test/chain-test.js
+++ b/test/chain-test.js
@@ -222,7 +222,7 @@ describe('Chain', function() {
     assert.equal(yield addBlock(attempt), 'bad-txns-inputs-missingorspent');
   }));
 
-  it('should fail to connect block with coins on an alternate chain', co(function* () {
+  it('should fail to connect coins on an alternate chain', co(function* () {
     var block = yield chain.db.getBlock(tip1.hash);
     var cb = block.txs[0];
     var mtx = new MTX();
diff --git a/test/coins-test.js b/test/coins-test.js
new file mode 100644
index 00000000..a9eb064c
--- /dev/null
+++ b/test/coins-test.js
@@ -0,0 +1,139 @@
+'use strict';
+
+var assert = require('assert');
+var util = require('../lib/utils/util');
+var encoding = require('../lib/utils/encoding');
+var crypto = require('../lib/crypto/crypto');
+var consensus = require('../lib/protocol/consensus');
+var Network = require('../lib/protocol/network');
+var TX = require('../lib/primitives/tx');
+var Block = require('../lib/primitives/block');
+var Coin = require('../lib/primitives/coin');
+var Output = require('../lib/primitives/output');
+var Script = require('../lib/script/script');
+var Witness = require('../lib/script/witness');
+var Input = require('../lib/primitives/input');
+var Outpoint = require('../lib/primitives/outpoint');
+var CoinView = require('../lib/coins/coinview');
+var Coins = require('../lib/coins/coins');
+var UndoCoins = require('../lib/coins/undocoins');
+var StaticWriter = require('../lib/utils/staticwriter');
+var BufferReader = require('../lib/utils/reader');
+var KeyRing = require('../lib/primitives/keyring');
+var parseTX = require('./util/common').parseTX;
+var opcodes = Script.opcodes;
+
+var data = parseTX('data/tx1.hex');
+var tx1 = data.tx;
+
+function collect(coins) {
+  var outputs = [];
+  var i;
+
+  for (i = 0; i < coins.outputs.length; i++) {
+    if (!coins.isUnspent(i))
+      continue;
+    outputs.push(coins.getOutput(i));
+  }
+
+  return outputs;
+}
+
+function reserialize(coins) {
+  var raw = coins.toRaw();
+  return Coins.fromRaw(raw);
+}
+
+function deepCoinsEqual(a, b) {
+  assert(a.outputs.length > 0);
+  assert(b.outputs.length > 0);
+
+  assert.strictEqual(a.version, b.version);
+  assert.strictEqual(a.height, b.height);
+  assert.strictEqual(a.coinbase, b.coinbase);
+  assert.strictEqual(a.length(), b.length());
+  assert.deepStrictEqual(collect(a), collect(b));
+}
+
+describe('Coins', function() {
+  it('should instantiate coinview from tx', function() {
+    var hash = tx1.hash('hex');
+    var view = new CoinView();
+    var prevout = new Outpoint(hash, 0);
+    var input = Input.fromOutpoint(prevout);
+    var coins, entry, output;
+
+    view.addTX(tx1, 1);
+
+    coins = view.get(hash);
+
+    assert.equal(coins.version, 1);
+    assert.equal(coins.height, 1);
+    assert.equal(coins.coinbase, false);
+    assert.equal(coins.outputs.length, tx1.outputs.length);
+
+    entry = coins.get(0);
+    assert(entry);
+    assert(!entry.spent);
+
+    assert.equal(entry.offset, 0);
+    assert.equal(entry.size, 0);
+    assert.equal(entry.raw, null);
+    assert(entry.output instanceof Output);
+    assert.equal(entry.spent, false);
+
+    output = view.getOutput(input);
+    assert(output);
+
+    deepCoinsEqual(coins, reserialize(coins));
+  });
+
+  it('should spend an output', function() {
+    var hash = tx1.hash('hex');
+    var view = new CoinView();
+    var coins, entry, length;
+
+    view.addTX(tx1, 1);
+
+    coins = view.get(hash);
+    assert(coins);
+    length = coins.length();
+
+    view.spendOutput(hash, 0);
+
+    coins = view.get(hash);
+    assert(coins);
+
+    entry = coins.get(0);
+    assert(entry);
+    assert(entry.spent);
+
+    deepCoinsEqual(coins, reserialize(coins));
+    assert.strictEqual(coins.length(), length);
+
+    assert.equal(view.undo.items.length, 1);
+  });
+
+  it('should handle coin view', function() {
+    var hash = tx1.hash('hex');
+    var view = new CoinView();
+    var i, tx, size, bw, br;
+    var raw, res, prev, coins;
+
+    for (i = 1; i < data.txs.length; i++) {
+      tx = data.txs[i];
+      view.addTX(tx, 1);
+    }
+
+    size = view.getFastSize(tx1);
+    bw = new StaticWriter(size);
+    raw = view.toFast(bw, tx1).render();
+    br = new BufferReader(raw);
+    res = CoinView.fromFast(br, tx1);
+
+    prev = tx1.inputs[0].prevout;
+    coins = res.get(prev.hash);
+
+    assert.deepStrictEqual(coins.get(0), reserialize(coins).get(0));
+  });
+});
diff --git a/test/data/tx3.hex b/test/data/tx3.hex
index 550b1d80..4511bf0b 100644
--- a/test/data/tx3.hex
+++ b/test/data/tx3.hex
@@ -1,4 +1,3 @@
 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
 010000000143d4b858145e44fbd121dbc592ae931b459f9ec99418a83e8cb6d94330a80c24010000006b483045022100f85c9fceb6d4d38c82a9121acbf68ffffe784017b05554b586464fdbe473340d0220077780b2022c2d97752961c2cb03ed9202cbe57647510746c6bd31276c8a3c5201210314ffdda8717bc586284c05f37192990f774c391e2088516d2983094d3a33e7c3ffffffff02a0860100000000001976a91419660c27383b347112e92caba64fb1d07e9f63bf88ac40c33800000000001976a914825537afe6d73324f862027690651a64c688dfb788ac00000000
 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
-
diff --git a/test/tx-test.js b/test/tx-test.js
index 0807dfdb..d34a9264 100644
--- a/test/tx-test.js
+++ b/test/tx-test.js
@@ -16,6 +16,7 @@ var Witness = require('../lib/script/witness');
 var Input = require('../lib/primitives/input');
 var CoinView = require('../lib/coins/coinview');
 var KeyRing = require('../lib/primitives/keyring');
+var parseTX = require('./util/common').parseTX;
 var opcodes = Script.opcodes;
 
 var valid = require('./data/tx_valid.json');
@@ -28,23 +29,6 @@ var tx4 = parseTX('data/tx4.hex');
 var wtx = parseTX('data/wtx.hex');
 var coolest = parseTX('data/coolest-tx-ever-sent.hex');
 
-function parseTX(file) {
-  var data = fs.readFileSync(__dirname + '/' + file, 'utf8');
-  var parts = data.trim().split(/\n+/);
-  var raw = parts[0];
-  var tx = TX.fromRaw(raw.trim(), 'hex');
-  var view = new CoinView();
-  var i, prev;
-
-  for (i = 1; i < parts.length; i++) {
-    raw = parts[i];
-    prev = TX.fromRaw(raw.trim(), 'hex');
-    view.addTX(prev, -1);
-  }
-
-  return { tx: tx, view: view };
-}
-
 function clearCache(tx, noCache) {
   if (!noCache) {
     assert.equal(tx.hash('hex'), tx.clone().hash('hex'));
diff --git a/test/util/common.js b/test/util/common.js
new file mode 100644
index 00000000..5e1a6322
--- /dev/null
+++ b/test/util/common.js
@@ -0,0 +1,28 @@
+'use strict';
+
+var fs = require('fs');
+var TX = require('../../lib/primitives/tx');
+var CoinView = require('../../lib/coins/coinview');
+
+exports.parseTX = function parseTX(file) {
+  var data = fs.readFileSync(__dirname + '/../' + file, 'utf8');
+  var parts = data.trim().split(/\n+/);
+  var raw = parts[0];
+  var tx = TX.fromRaw(raw.trim(), 'hex');
+  var view = new CoinView();
+  var txs = [tx];
+  var i, prev;
+
+  for (i = 1; i < parts.length; i++) {
+    raw = parts[i];
+    prev = TX.fromRaw(raw.trim(), 'hex');
+    view.addTX(prev, -1);
+    txs.push(prev);
+  }
+
+  return {
+    tx: tx,
+    view: view,
+    txs: txs
+  };
+};