diff --git a/lib/model/txproposal_legacy.js b/lib/model/txproposal_legacy.js
index a2af008..da39d8f 100644
--- a/lib/model/txproposal_legacy.js
+++ b/lib/model/txproposal_legacy.js
@@ -273,16 +273,19 @@ TxProposal.prototype.getRawTx = function() {
   return t.uncheckedSerialize();
 };
 
+TxProposal.prototype.getEstimatedSizeForSingleInput = function() {
+  return this.requiredSignatures * 72 + this.walletN * 36 + 44;
+};
+
 TxProposal.prototype.getEstimatedSize = function() {
   // Note: found empirically based on all multisig P2SH inputs and within m & n allowed limits.
   var safetyMargin = 0.05;
-  var walletM = this.requiredSignatures;
 
   var overhead = 4 + 4 + 9 + 9;
-  var inputSize = walletM * 72 + this.walletN * 36 + 44;
+  var inputSize = this.getEstimatedSizeForSingleInput();
   var outputSize = 34;
   var nbInputs = this.inputs.length;
-  var nbOutputs = (_.isArray(this.outputs) ? this.outputs.length : 1) + 1;
+  var nbOutputs = (_.isArray(this.outputs) ? Math.max(1, this.outputs.length) : 1) + 1;
 
   var size = overhead + inputSize * nbInputs + outputSize * nbOutputs;
 
diff --git a/test/integration/helpers.js b/test/integration/helpers.js
index 09192e8..1d43e8e 100644
--- a/test/integration/helpers.js
+++ b/test/integration/helpers.js
@@ -212,6 +212,40 @@ helpers.toSatoshi = function(btc) {
   }
 };
 
+helpers._parseAmount = function(str) {
+  var result = {
+    amount: +0,
+    confirmations: _.random(6, 100),
+  };
+
+  if (_.isNumber(str)) str = str.toString();
+
+  var re = /^((?:\d+c)|u)?\s*([\d\.]+)\s*(btc|bit|sat)?$/;
+  var match = str.match(re);
+
+  if (!match) throw new Error('Could not parse amount ' + str);
+
+  if (match[1]) {
+    if (match[1] == 'u') result.confirmations = 0;
+    if (_.endsWith(match[1], 'c')) result.confirmations = +match[1].slice(0, -1);
+  }
+
+  switch (match[3]) {
+    default:
+    case 'btc':
+      result.amount = Utils.strip(match[2] * 1e8);
+      break;
+    case 'bit':
+      result.amount = Utils.strip(match[2] * 1e6);
+      break
+    case 'sat':
+      result.amount = Utils.strip(match[2]);
+      break;
+  };
+
+  return result;
+};
+
 helpers.stubUtxos = function(server, wallet, amounts, opts, cb) {
   if (_.isFunction(opts)) {
     cb = opts;
@@ -233,17 +267,9 @@ helpers.stubUtxos = function(server, wallet, amounts, opts, cb) {
       addresses.should.not.be.empty;
 
       var utxos = _.compact(_.map([].concat(amounts), function(amount, i) {
-        var confirmations = _.random(6, 100);
-        if (_.isString(amount)) {
-          if (_.startsWith(amount, 'u')) {
-            amount = parseFloat(amount.substring(1));
-            confirmations = 0;
-          } else if (_.startsWith(amount, '<6')) {
-            amount = parseFloat(amount.substring(2));
-            confirmations = _.random(1, 5);
-          }
-        }
-        if (amount <= 0) return null;
+        var parsed = helpers._parseAmount(amount);
+        console.log('*** [helpers.js ln270] amount, result:', amount, parsed); // TODO
+        if (parsed.amount <= 0) return null;
 
         var address = addresses[i % addresses.length];
 
@@ -261,10 +287,10 @@ helpers.stubUtxos = function(server, wallet, amounts, opts, cb) {
         return {
           txid: helpers.randomTXID(),
           vout: _.random(0, 10),
-          satoshis: helpers.toSatoshi(amount),
+          satoshis: parsed.amount,
           scriptPubKey: scriptPubKey.toBuffer().toString('hex'),
           address: address.address,
-          confirmations: confirmations
+          confirmations: parsed.confirmations,
         };
       }));
 
diff --git a/test/integration/server.js b/test/integration/server.js
index 1effa87..0fcba03 100644
--- a/test/integration/server.js
+++ b/test/integration/server.js
@@ -5778,7 +5778,7 @@ describe('Wallet service', function() {
       });
     });
     it.skip('should select smallest big utxo if small utxos exceed maximum fee', function(done) {});
-    it.only('should ignore utxos not contributing enough to cover increase in fee', function(done) {
+    it('should ignore utxos not contributing enough to cover increase in fee', function(done) {
       helpers.stubUtxos(server, wallet, [0.0001, 0.0001, 0.0001], function() {
         var txOpts = {
           outputs: [{