diff --git a/bigquery/synth.metadata b/bigquery/synth.metadata
index 4320d1d271bfc..20fa1a3c09e1e 100644
--- a/bigquery/synth.metadata
+++ b/bigquery/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-04-03T23:38:10.307198Z",
+  "updateTime": "2019-05-14T12:12:02.278804Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.23",
-        "dockerImage": "googleapis/artman@sha256:f3a3f88000dc1cd1b4826104c5574aa5c534f6793fbf66e888d11c0d7ef5762e"
+        "version": "0.19.0",
+        "dockerImage": "googleapis/artman@sha256:d3df563538225ac6caac45d8ad86499500211d1bcb2536955a6dbda15e1b368e"
       }
     },
     {
       "git": {
         "name": "googleapis",
-        "remote": "git@github.com:googleapis/googleapis.git",
-        "sha": "04193ea2f8121388c998ab49c382f2c03417dcce",
-        "internalRef": "241828309"
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "ffa256646fb15c4a6c720f0ed8f984a0ea513416",
+        "internalRef": "248066377"
       }
     }
   ],
diff --git a/bigquery/tests/unit/test_table.py b/bigquery/tests/unit/test_table.py
index 816ba4ec48da8..378323ce2932f 100644
--- a/bigquery/tests/unit/test_table.py
+++ b/bigquery/tests/unit/test_table.py
@@ -1960,7 +1960,8 @@ def test_to_dataframe_w_bqstorage_multiple_streams_return_unique_index(self):
         session.avro_schema.schema = json.dumps({"fields": [{"name": "colA"}]})
 
         bqstorage_client = mock.create_autospec(
-            bigquery_storage_v1beta1.BigQueryStorageClient)
+            bigquery_storage_v1beta1.BigQueryStorageClient
+        )
         bqstorage_client.create_read_session.return_value = session
 
         mock_rowstream = mock.create_autospec(reader.ReadRowsStream)
@@ -1970,7 +1971,8 @@ def test_to_dataframe_w_bqstorage_multiple_streams_return_unique_index(self):
         mock_rowstream.rows.return_value = mock_rows
 
         page_data_frame = pandas.DataFrame(
-            [{"colA": 1}, {"colA": -1}], columns=["colA"])
+            [{"colA": 1}, {"colA": -1}], columns=["colA"]
+        )
         mock_page = mock.create_autospec(reader.ReadRowsPage)
         mock_page.to_dataframe.return_value = page_data_frame
         mock_pages = (mock_page, mock_page, mock_page)
@@ -2184,14 +2186,15 @@ def test_to_dataframe_w_bqstorage_fallback_to_tabledata_list(self):
         self.assertEqual(df.age.dtype.name, "int64")
 
     @unittest.skipIf(pandas is None, "Requires `pandas`")
-    @mock.patch("google.cloud.bigquery.table.RowIterator.pages",
-                new_callable=mock.PropertyMock)
-    def test_to_dataframe_tabledata_list_w_multiple_pages_return_unique_index(self, mock_pages):
+    @mock.patch(
+        "google.cloud.bigquery.table.RowIterator.pages", new_callable=mock.PropertyMock
+    )
+    def test_to_dataframe_tabledata_list_w_multiple_pages_return_unique_index(
+        self, mock_pages
+    ):
         from google.cloud.bigquery import schema
 
-        iterator_schema = [
-            schema.SchemaField("name", "STRING", mode="REQUIRED"),
-        ]
+        iterator_schema = [schema.SchemaField("name", "STRING", mode="REQUIRED")]
         pages = [[{"name": "Bengt"}], [{"name": "Sven"}]]
 
         mock_pages.return_value = pages