Finish async when failing async test

1 files changed, 1 insertions, 1 deletions

diff --git a/test/unit/tx-controller-test.js b/test/unit/tx-controller-test.js
index f05ae479b..f0d8a706e 100644
--- a/test/unit/tx-controller-test.js
+++ b/test/unit/tx-controller-test.js
@@ -314,7 +314,7 @@ describe('Transaction Controller', function () {
     it('prepares a tx with the chainId set', function (done) {
       txController.addTx({ id: '1', status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
       txController.signTransaction('1', (err, rawTx) => {
-        if (err) return assert.fail('it should not fail')
+        if (err) return done('it should not fail')
         const ethTx = new EthTx(ethUtil.toBuffer(rawTx))
         assert.equal(ethTx.getChainId(), currentNetworkId)
         done()