diff --git a/package.json b/package.json
index b8e4908272..e9849d8ede 100644
--- a/package.json
+++ b/package.json
@@ -9,10 +9,10 @@
 		"bench:run": "lerna exec ${PACKAGE:+--scope=@jpmorganchase/${PACKAGE}} -- npm run bench:run",
 		"bench": "npm-run-all bench:build bench:run",
 		"test:build": "[[ -z \"${PSP_DOCKER}\" ]] && npm run _build_test || npm run _emsdk -- npm run _build_test",
-		"test:run": "npm run _test_perspective && npm run _test_viewer && npm run _test_hypergrid && npm run _test_highcharts",
+		"test:run": "npm run --silent _test_perspective && npm run --silent _test_viewer && npm run --silent _test_hypergrid && npm run --silent _test_highcharts",
 		"test": "npm-run-all test:build test:run",
 		"clean": "lerna run clean --stream",
-		"quiet_test": "npm run _puppeteer -- npm run _quiet_test",
+		"quiet_test": "npm run --silent _puppeteer -- npm run --silent _quiet_test",
 		"write_tests": "WRITE_TESTS=1 npm run test:run",
 		"postinstall": "lerna bootstrap --hoist",
 		"_build": "lerna run build ${PACKAGE:+--scope=@jpmorganchase/${PACKAGE}} --stream",
@@ -20,9 +20,9 @@
 		"_emsdk": "docker run --rm -it -v $(pwd):/src -e PACKAGE=${PACKAGE} perspective/emsdk",
 		"_puppeteer": "docker run -it --rm --shm-size=2g -u root -e WRITE_TESTS=${WRITE_TESTS} -v $(pwd):/src -w /src/packages/${PACKAGE} perspective/puppeteer",
 		"_quiet_test": "lerna run test:run ${PACKAGE:+--scope=@jpmorganchase/${PACKAGE}}",
-		"_test_perspective": "PACKAGE=perspective npm run _puppeteer -- npm run test:run",
-		"_test_viewer": "PACKAGE=perspective-viewer npm run _puppeteer -- npm run test:run",
-		"_test_hypergrid": "PACKAGE=perspective-viewer-hypergrid npm run _puppeteer -- npm run test:run",
-		"_test_highcharts": "PACKAGE=perspective-viewer-highcharts npm run _puppeteer -- npm run test:run"
+		"_test_perspective": "PACKAGE=perspective npm run --silent _puppeteer -- npm run --silent test:run",
+		"_test_viewer": "PACKAGE=perspective-viewer npm run --silent _puppeteer -- npm run --silent test:run",
+		"_test_hypergrid": "PACKAGE=perspective-viewer-hypergrid npm run --silent _puppeteer -- npm --silent run test:run",
+		"_test_highcharts": "PACKAGE=perspective-viewer-highcharts npm run --silent _puppeteer -- npm --silent run test:run"
 	}
 }
diff --git a/packages/perspective-viewer-highcharts/test/results/results.json b/packages/perspective-viewer-highcharts/test/results/results.json
index 53caac7198..a63e03761e 100644
--- a/packages/perspective-viewer-highcharts/test/results/results.json
+++ b/packages/perspective-viewer-highcharts/test/results/results.json
@@ -61,5 +61,10 @@
     "treemap.html/filters by a numeric column.": "e79978195df664206e4d8e233a408b6f",
     "treemap.html/sorts by an alpha column.": "cf3c51e9b18fddade098bd7203ed4832",
     "treemap.html/displays visible columns.": "7f8e4756e554bc34920ea32eaf0373ae",
-    "treemap.html/tooltip shows on hover.": "d82160988637350390ed0f1c13794762"
+    "treemap.html/tooltip shows on hover.": "d82160988637350390ed0f1c13794762",
+    "scatter.html/pivots by a column.": "a1bf47633d4f11fa9e026df63a6a2983",
+    "heatmap.html/pivots by a column.": "a30c031a166ce10b925fade0fa727568",
+    "line.html/pivots by a column.": "a9cdbcf9dc241c5a11077c325765eac4",
+    "bar.html/pivots by a column.": "e38874f04098eabf0feb0dad278d7a05",
+    "treemap.html/pivots by a column.": "716d4b3985568360c5f61f9c8f20ac69"
 }
\ No newline at end of file
diff --git a/packages/perspective-viewer-hypergrid/test/results/results.json b/packages/perspective-viewer-hypergrid/test/results/results.json
index a2f7647f5f..e2d90ed7a7 100644
--- a/packages/perspective-viewer-hypergrid/test/results/results.json
+++ b/packages/perspective-viewer-hypergrid/test/results/results.json
@@ -10,5 +10,6 @@
     "superstore.html/resets viewable area when the logical size expands.": "b7bf4b0d438ccd2141f56d5582d7d1af",
     "superstore.html/resets viewable area when the physical size expands.": "5c9f7fcce4e9bb1f144409afbc43b0fa",
     "superstore.html/sorts by a hidden column.": "9b7f9c4f32d5c55d30294391cba272a6",
-    "superstore.html/filters by a numeric column.": "52f89aceca9f801cbcb7932535a14370"
+    "superstore.html/filters by a numeric column.": "52f89aceca9f801cbcb7932535a14370",
+    "superstore.html/pivots by a column.": "3179b8b88a1915425ec41406cd7516cd"
 }
\ No newline at end of file
diff --git a/packages/perspective-viewer/test/js/simple_tests.js b/packages/perspective-viewer/test/js/simple_tests.js
index 8e92e06238..4706b93e88 100644
--- a/packages/perspective-viewer/test/js/simple_tests.js
+++ b/packages/perspective-viewer/test/js/simple_tests.js
@@ -24,6 +24,12 @@ exports.default = function() {
         await page.evaluate(element => element.setAttribute('row-pivots', '["Category","Sub-Category"]'), viewer);
     });
 
+    test.capture("pivots by a column.", async page => {        
+        await page.click('#config_button');
+        const viewer = await page.$('perspective-viewer');
+        await page.evaluate(element => element.setAttribute('column-pivots', '["Category"]'), viewer);
+    });
+
     test.capture("pivots by a row and a column.", async page => {        
         await page.click('#config_button');
         const viewer = await page.$('perspective-viewer');
diff --git a/packages/perspective-viewer/test/results/results.json b/packages/perspective-viewer/test/results/results.json
index c063186648..722e2a26ef 100644
--- a/packages/perspective-viewer/test/results/results.json
+++ b/packages/perspective-viewer/test/results/results.json
@@ -10,5 +10,6 @@
     "superstore.html/sorts by a hidden column.": "ea40ec5853b636e0d218815b7ffd5ba8",
     "superstore.html/filters by a numeric column.": "d8d1fecdb6ae6cf8b07f5d38b03944c0",
     "superstore.html/shows horizontal columns on small viewports.": "64f400a8d9ec3c345bb61d097c3c1c55",
-    "blank.html/Handles reloading with a schema.": "12aece0a0c593b9fe8fd7966abd75b32"
+    "blank.html/Handles reloading with a schema.": "12aece0a0c593b9fe8fd7966abd75b32",
+    "superstore.html/pivots by a column.": "743cae89803c62ef46eeff5c89b7dae3"
 }
\ No newline at end of file
diff --git a/packages/perspective/src/js/perspective.js b/packages/perspective/src/js/perspective.js
index 859142db60..ea4ec7ba2f 100644
--- a/packages/perspective/src/js/perspective.js
+++ b/packages/perspective/src/js/perspective.js
@@ -581,7 +581,7 @@ const to_format = async function (options, formatter) {
         formatter.addRow(data, row);
     }
     if (this.config.row_pivot[0] === 'psp_okey') {
-        data = data.slice(this.config.column_pivot.length);
+        data = formatter.slice(data, this.config.column_pivot.length);
     }
     
     return formatter.formatData(data, options.config)
diff --git a/packages/perspective/src/js/view_formatters.js b/packages/perspective/src/js/view_formatters.js
index a5104ae623..caadf8c570 100644
--- a/packages/perspective/src/js/view_formatters.js
+++ b/packages/perspective/src/js/view_formatters.js
@@ -16,7 +16,8 @@ const jsonFormatter = {
     setColumnValue: (data, row, colName, value) => row[colName] = value,
     addColumnValue: (data, row, colName, value) => row[colName].unshift(value),
     addRow: (data, row) => data.push(row),
-    formatData: data => data
+    formatData: data => data,
+    slice: (data, start, length) => data.slice(start, length)
 };
 
 const csvFormatter = Object.assign({}, jsonFormatter, {
@@ -39,7 +40,13 @@ const jsonTableFormatter = {
         data[colName].push([]);
     },
     addRow: (data, row) => {},
-    formatData: data => data
+    formatData: data => data,
+    slice: (data, start, length) => {
+        for (let x in data) {
+            data[x].splice(start, length);
+        }
+        return data;
+    }
 }
 
 export default {