diff --git a/src/v1/datastore_client.js b/src/v1/datastore_client.js
index cf13ffb9c..e68f873e3 100644
--- a/src/v1/datastore_client.js
+++ b/src/v1/datastore_client.js
@@ -60,6 +60,7 @@ class DatastoreClient {
    *     API remote host.
    */
   constructor(opts) {
+    opts = opts || {};
     this._descriptors = {};
 
     const servicePath =
diff --git a/synth.metadata b/synth.metadata
index a3ea73a3c..bf505af74 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-06-04T19:30:55.849433Z",
+  "updateTime": "2019-06-05T11:08:22.444988Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.23.0",
-        "dockerImage": "googleapis/artman@sha256:846102ebf7ea2239162deea69f64940443b4147f7c2e68d64b332416f74211ba"
+        "version": "0.23.1",
+        "dockerImage": "googleapis/artman@sha256:9d5cae1454da64ac3a87028f8ef486b04889e351c83bb95e83b8fab3959faed0"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "0026f4b890ed9e2388fb0573c0727defa6f5b82e",
-        "internalRef": "251265049"
+        "sha": "4f3516a6f96dac182973a3573ff5117e8e4f76c7",
+        "internalRef": "251559960"
       }
     },
     {
diff --git a/test/gapic-v1.js b/test/gapic-v1.js
index f1df1c551..000067e40 100644
--- a/test/gapic-v1.js
+++ b/test/gapic-v1.js
@@ -39,6 +39,11 @@ describe('DatastoreClient', () => {
     assert(typeof port === 'number');
   });
 
+  it('should create a client with no options', () => {
+    const client = new datastoreModule.v1.DatastoreClient();
+    assert(client);
+  });
+
   describe('lookup', () => {
     it('invokes lookup without error', done => {
       const client = new datastoreModule.v1.DatastoreClient({