diff --git a/src/plots/cartesian/tick_label_defaults.js b/src/plots/cartesian/tick_label_defaults.js
index c899ff91def..446dbd6b7b2 100644
--- a/src/plots/cartesian/tick_label_defaults.js
+++ b/src/plots/cartesian/tick_label_defaults.js
@@ -25,10 +25,11 @@ module.exports = function handleTickLabelDefaults(containerIn, containerOut, coe
     var showTickLabels = coerce('showticklabels');
     if(showTickLabels) {
         var font = options.font || {};
+        var contColor = containerOut.color;
         // as with titlefont.color, inherit axis.color only if one was
         // explicitly provided
-        var dfltFontColor = (containerOut.color !== layoutAttributes.color.dflt) ?
-            containerOut.color : font.color;
+        var dfltFontColor = (contColor && contColor !== layoutAttributes.color.dflt) ?
+            contColor : font.color;
         Lib.coerceFont(coerce, 'tickfont', {
             family: font.family,
             size: font.size,
diff --git a/src/traces/box/plot.js b/src/traces/box/plot.js
index e8538b22957..236bfe2b7ea 100644
--- a/src/traces/box/plot.js
+++ b/src/traces/box/plot.js
@@ -90,7 +90,7 @@ function plotBoxAndWhiskers(sel, axes, trace, t) {
 
     var paths = sel.selectAll('path.box').data((
         trace.type !== 'violin' ||
-        trace.box
+        trace.box.visible
     ) ? Lib.identity : []);
 
     paths.enter().append('path')
@@ -292,7 +292,7 @@ function plotBoxMean(sel, axes, trace, t) {
 
     var paths = sel.selectAll('path.mean').data((
         (trace.type === 'box' && trace.boxmean) ||
-        (trace.type === 'violin' && trace.box && trace.meanline)
+        (trace.type === 'violin' && trace.box.visible && trace.meanline.visible)
     ) ? Lib.identity : []);
 
     paths.enter().append('path')
diff --git a/src/traces/violin/defaults.js b/src/traces/violin/defaults.js
index e0495e83c54..869e7b08320 100644
--- a/src/traces/violin/defaults.js
+++ b/src/traces/violin/defaults.js
@@ -46,10 +46,10 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     var boxLineColor = coerce2('box.line.color', lineColor);
     var boxLineWidth = coerce2('box.line.width', lineWidth);
     var boxVisible = coerce('box.visible', Boolean(boxWidth || boxFillColor || boxLineColor || boxLineWidth));
-    if(!boxVisible) delete traceOut.box;
+    if(!boxVisible) traceOut.box = {visible: false};
 
     var meanLineColor = coerce2('meanline.color', lineColor);
     var meanLineWidth = coerce2('meanline.width', lineWidth);
     var meanLineVisible = coerce('meanline.visible', Boolean(meanLineColor || meanLineWidth));
-    if(!meanLineVisible) delete traceOut.meanline;
+    if(!meanLineVisible) traceOut.meanline = {visible: false};
 };
diff --git a/src/traces/violin/plot.js b/src/traces/violin/plot.js
index 6912fd6f0f3..43b53a8046e 100644
--- a/src/traces/violin/plot.js
+++ b/src/traces/violin/plot.js
@@ -138,7 +138,7 @@ module.exports = function plot(gd, plotinfo, cdViolins, violinLayer) {
             d.pathLength = d.path.getTotalLength() / (hasBothSides ? 2 : 1);
         });
 
-        var boxAttrs = trace.box || {};
+        var boxAttrs = trace.box;
         var boxWidth = boxAttrs.width;
         var boxLineWidth = (boxAttrs.line || {}).width;
         var bdPosScaled;
@@ -170,7 +170,7 @@ module.exports = function plot(gd, plotinfo, cdViolins, violinLayer) {
         });
 
         var fn;
-        if(!(trace.box || {}).visible && (trace.meanline || {}).visible) {
+        if(!trace.box.visible && trace.meanline.visible) {
             fn = Lib.identity;
         }
 
diff --git a/test/jasmine/tests/colorbar_test.js b/test/jasmine/tests/colorbar_test.js
index 48ab85137d3..6456ea4eb1d 100644
--- a/test/jasmine/tests/colorbar_test.js
+++ b/test/jasmine/tests/colorbar_test.js
@@ -2,15 +2,46 @@ var d3 = require('d3');
 
 var Plotly = require('@lib/index');
 var Colorbar = require('@src/components/colorbar');
+
 var createGraphDiv = require('../assets/create_graph_div');
 var destroyGraphDiv = require('../assets/destroy_graph_div');
 var failTest = require('../assets/fail_test');
+var supplyAllDefaults = require('../assets/supply_defaults');
 var assertPlotSize = require('../assets/custom_assertions').assertPlotSize;
 
 
 describe('Test colorbar:', function() {
     'use strict';
 
+    describe('supplyDefaults:', function() {
+        function _supply(trace, layout) {
+            var gd = {
+                data: [trace],
+                layout: layout
+            };
+            supplyAllDefaults(gd);
+            return gd._fullData[0];
+        }
+
+        it('should fill in tickfont defaults', function() {
+            var out = _supply({
+                type: 'heatmap',
+                z: [[1, 2, 3], [2, 3, 6]]
+            });
+            expect(out.colorbar.tickfont.color).toBe('#444', 'dflt color');
+        });
+
+        it('should inherit tickfont defaults from global font', function() {
+            var out = _supply({
+                type: 'heatmap',
+                z: [[1, 2, 3], [2, 3, 6]]
+            }, {
+                font: {color: 'red'}
+            });
+            expect(out.colorbar.tickfont.color).toBe('red', 'from global font');
+        });
+    });
+
     describe('hasColorbar', function() {
         var hasColorbar = Colorbar.hasColorbar,
             trace;
diff --git a/test/jasmine/tests/gl2d_plot_interact_test.js b/test/jasmine/tests/gl2d_plot_interact_test.js
index 827d283c94d..6c456d5f9ee 100644
--- a/test/jasmine/tests/gl2d_plot_interact_test.js
+++ b/test/jasmine/tests/gl2d_plot_interact_test.js
@@ -27,7 +27,10 @@ describe('@gl Test removal of gl contexts', function() {
         gd = createGraphDiv();
     });
 
-    afterEach(destroyGraphDiv);
+    afterEach(function() {
+        Plotly.purge(gd);
+        destroyGraphDiv();
+    });
 
     it('Plots.cleanPlot should remove gl context from the graph div of a gl2d plot', function(done) {
         Plotly.plot(gd, [{
@@ -41,6 +44,7 @@ describe('@gl Test removal of gl contexts', function() {
 
             expect(!!gd._fullLayout._plots.xy._scene).toBe(false);
         })
+        .catch(failTest)
         .then(done);
     });
 
@@ -83,6 +87,7 @@ describe('@gl Test removal of gl contexts', function() {
                 firstCanvas !== secondCanvas && firstGlContext.isContextLost()
             );
         })
+        .catch(failTest)
         .then(done);
     });
 });
@@ -118,6 +123,7 @@ describe('@gl Test gl plot side effects', function() {
             var rangeSlider = document.getElementsByClassName('range-slider')[0];
             expect(rangeSlider).not.toBeDefined();
         })
+        .catch(failTest)
         .then(done);
     });
 
@@ -160,6 +166,7 @@ describe('@gl Test gl plot side effects', function() {
 
             return Plotly.purge(gd);
         })
+        .catch(failTest)
         .then(done);
     });
 
@@ -184,6 +191,7 @@ describe('@gl Test gl plot side effects', function() {
         .then(function() {
             expect(d3.selectAll('canvas').size()).toEqual(0);
         })
+        .catch(failTest)
         .then(done);
     });
 
diff --git a/test/jasmine/tests/violin_test.js b/test/jasmine/tests/violin_test.js
index c6763ba0c8d..3d5acc95435 100644
--- a/test/jasmine/tests/violin_test.js
+++ b/test/jasmine/tests/violin_test.js
@@ -124,8 +124,8 @@ describe('Test violin defaults', function() {
                 color: 'red'
             }
         });
-        expect(traceOut.box).toBeUndefined();
-        expect(traceOut.meanline).toBeUndefined();
+        expect(traceOut.box).toEqual({visible: false});
+        expect(traceOut.meanline).toEqual({visible: false});
     });
 
     it('should use violin style settings to default inner style attribute', function() {