diff --git a/rendering/cases/polygon-style-gradient-pattern/expected.png b/rendering/cases/polygon-style-gradient-pattern/expected.png
new file mode 100644
index 0000000000..c79f9e507f
Binary files /dev/null and b/rendering/cases/polygon-style-gradient-pattern/expected.png differ
diff --git a/rendering/cases/polygon-style-gradient-pattern/main.js b/rendering/cases/polygon-style-gradient-pattern/main.js
new file mode 100644
index 0000000000..7c01b61d81
--- /dev/null
+++ b/rendering/cases/polygon-style-gradient-pattern/main.js
@@ -0,0 +1,84 @@
+import Map from '../../../src/ol/Map.js';
+import View from '../../../src/ol/View.js';
+import Feature from '../../../src/ol/Feature.js';
+import Polygon from '../../../src/ol/geom/Polygon.js';
+import VectorLayer from '../../../src/ol/layer/Vector.js';
+import VectorSource from '../../../src/ol/source/Vector.js';
+import Style from '../../../src/ol/style/Style.js';
+import Fill from '../../../src/ol/style/Fill.js';
+import Stroke from '../../../src/ol/style/Stroke.js';
+
+
+// create gradient
+const canvas = document.createElement('canvas');
+const context = canvas.getContext('2d');
+const gradient = context.createLinearGradient(0, 0, 30, 0);
+gradient.addColorStop(0, 'red');
+gradient.addColorStop(1 / 6, 'orange');
+gradient.addColorStop(2 / 6, 'yellow');
+gradient.addColorStop(3 / 6, 'green');
+gradient.addColorStop(4 / 6, 'aqua');
+gradient.addColorStop(5 / 6, 'blue');
+gradient.addColorStop(1, 'purple');
+
+// create pattern
+canvas.width = 11;
+canvas.height = 11;
+context.fillStyle = 'rgba(102, 0, 102, 0.5)';
+context.beginPath();
+context.arc(5, 5, 4, 0, 2 * Math.PI);
+context.fill();
+context.fillStyle = 'rgb(55, 0, 170)';
+context.beginPath();
+context.arc(5, 5, 2, 0, 2 * Math.PI);
+context.fill();
+const pattern = context.createPattern(canvas, 'repeat');
+
+
+const vectorSource = new VectorSource();
+let feature;
+
+// rectangle with 1 hole
+feature = new Feature({
+  geometry: new Polygon([
+    [[-22.5, -5], [-22.5, 35], [37.5, 35], [37.5, -5], [-22.5, -5]],
+    [[-2.5, 7], [17.5, 7], [17.5, 23], [-2.5, 23], [-2.5, 7]]
+  ])
+});
+
+feature.setStyle(new Style({
+  fill: new Fill({color: pattern}),
+  stroke: new Stroke({color: gradient, width: 3})
+}));
+vectorSource.addFeature(feature);
+
+// rectangle with 2 holes
+feature = new Feature({
+  geometry: new Polygon([
+    [[-37.5, -32.5], [-37.5, 17.5], [32.5, 17.5], [32.5, -32.5], [-37.5, -32.5]],
+    [[-33.5, -28.5], [-21.5, -28.5], [-21.5, -16.5], [-33.5, -16.5], [-33.5, -28.5]],
+    [[12.5, -28.5], [26.5, -28.5], [26.5, -16.5], [12.5, -16.5], [12.5, -28.5]]
+  ])
+});
+
+feature.setStyle(new Style({
+  fill: new Fill({color: gradient}),
+  stroke: new Stroke({color: pattern, width: 5})
+}));
+vectorSource.addFeature(feature);
+
+new Map({
+  pixelRatio: 1,
+  layers: [
+    new VectorLayer({
+      source: vectorSource
+    })
+  ],
+  target: 'map',
+  view: new View({
+    center: [0, 0],
+    resolution: 1
+  })
+});
+
+render();
diff --git a/rendering/cases/polygon-style/expected.png b/rendering/cases/polygon-style/expected.png
new file mode 100644
index 0000000000..1a4786acc6
Binary files /dev/null and b/rendering/cases/polygon-style/expected.png differ
diff --git a/rendering/cases/polygon-style/main.js b/rendering/cases/polygon-style/main.js
new file mode 100644
index 0000000000..1e85099865
--- /dev/null
+++ b/rendering/cases/polygon-style/main.js
@@ -0,0 +1,100 @@
+import Map from '../../../src/ol/Map.js';
+import View from '../../../src/ol/View.js';
+import Feature from '../../../src/ol/Feature.js';
+import Polygon from '../../../src/ol/geom/Polygon.js';
+import VectorLayer from '../../../src/ol/layer/Vector.js';
+import VectorSource from '../../../src/ol/source/Vector.js';
+import Style from '../../../src/ol/style/Style.js';
+import Fill from '../../../src/ol/style/Fill.js';
+import Stroke from '../../../src/ol/style/Stroke.js';
+
+const vectorSource = new VectorSource();
+let feature;
+
+// rectangle with 1 hole
+feature = new Feature({
+  geometry: new Polygon([
+    [[-102.5, 75], [-102.5, 115], [-42.5, 115], [-42.5, 75], [-102.5, 75]],
+    [[-82.5, 87], [-62.5, 87], [-62.5, 103], [-82.5, 103], [-82.5, 87]]
+  ])
+});
+
+feature.setStyle(new Style({
+  stroke: new Stroke({
+    width: 4,
+    color: '#000',
+    lineJoin: 'round',
+    lineCap: 'butt'
+  })
+}));
+vectorSource.addFeature(feature);
+
+// rectangle with 2 holes
+feature = new Feature({
+  geometry: new Polygon([
+    [[-117.5, 47.5], [-117.5, 97.5], [-47.5, 97.5], [-47.5, 47.5], [-117.5, 47.5]],
+    [[-113.5, 51.5], [-101.5, 51.5], [-101.5, 63.5], [-113.5, 63.5], [-113.5, 51.5]],
+    [[-67.5, 51.5], [-53.5, 51.5], [-53.5, 63.5], [-67.5, 63.5], [-67.5, 51.5]]
+  ])
+});
+
+feature.setStyle(new Style({
+  zIndex: -1,
+  fill: new Fill({
+    color: '#1A5E42'
+  }),
+  stroke: new Stroke({
+    color: '#9696EB',
+    width: 3
+  })
+}));
+vectorSource.addFeature(feature);
+
+
+// rectangle with 1 hole
+feature = new Feature({
+  geometry: new Polygon([
+    [[-22.5, -5], [-22.5, 35], [37.5, 35], [37.5, -5], [-22.5, -5]],
+    [[-2.5, 7], [17.5, 7], [17.5, 23], [-2.5, 23], [-2.5, 7]]
+  ])
+});
+feature.setStyle(new Style({
+  stroke: new Stroke({
+    width: 3,
+    color: '#777',
+    lineDash: [2, 4]
+  })
+}));
+vectorSource.addFeature(feature);
+
+// rectangle with 2 holes
+feature = new Feature({
+  geometry: new Polygon([
+    [[-37.5, -32.5], [-37.5, 17.5], [32.5, 17.5], [32.5, -32.5], [-37.5, -32.5]],
+    [[-33.5, -28.5], [-21.5, -28.5], [-21.5, -16.5], [-33.5, -16.5], [-33.5, -28.5]],
+    [[12.5, -28.5], [26.5, -28.5], [26.5, -16.5], [12.5, -16.5], [12.5, -28.5]]
+  ])
+});
+feature.setStyle(new Style({
+  fill: new Fill({
+    color: 'rgba(255, 0, 0, 0.85)'
+  })
+}));
+vectorSource.addFeature(feature);
+
+
+new Map({
+  pixelRatio: 1,
+  layers: [
+    new VectorLayer({
+      source: vectorSource
+    })
+  ],
+  target: 'map',
+  view: new View({
+    center: [0, 0],
+    resolution: 1
+  })
+});
+
+render();
diff --git a/test/rendering/ol/style/expected/polygon-fill-and-strokes-canvas.png b/test/rendering/ol/style/expected/polygon-fill-and-strokes-canvas.png
deleted file mode 100644
index b1b5d9d4d0..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-fill-and-strokes-canvas.png and /dev/null differ
diff --git a/test/rendering/ol/style/expected/polygon-fill-and-strokes-webgl.png b/test/rendering/ol/style/expected/polygon-fill-and-strokes-webgl.png
deleted file mode 100644
index da2f9000f4..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-fill-and-strokes-webgl.png and /dev/null differ
diff --git a/test/rendering/ol/style/expected/polygon-pattern-gradient-canvas.png b/test/rendering/ol/style/expected/polygon-pattern-gradient-canvas.png
deleted file mode 100644
index 769c63fcce..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-pattern-gradient-canvas.png and /dev/null differ
diff --git a/test/rendering/ol/style/expected/polygon-types-canvas-stroke.png b/test/rendering/ol/style/expected/polygon-types-canvas-stroke.png
deleted file mode 100644
index 4fd104c62b..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-types-canvas-stroke.png and /dev/null differ
diff --git a/test/rendering/ol/style/expected/polygon-types-canvas.png b/test/rendering/ol/style/expected/polygon-types-canvas.png
deleted file mode 100644
index 4abfccb058..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-types-canvas.png and /dev/null differ
diff --git a/test/rendering/ol/style/expected/polygon-types-webgl-stroke.png b/test/rendering/ol/style/expected/polygon-types-webgl-stroke.png
deleted file mode 100644
index 624f096158..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-types-webgl-stroke.png and /dev/null differ
diff --git a/test/rendering/ol/style/expected/polygon-types-webgl.png b/test/rendering/ol/style/expected/polygon-types-webgl.png
deleted file mode 100644
index 4abfccb058..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-types-webgl.png and /dev/null differ
diff --git a/test/rendering/ol/style/expected/polygon-zindex-canvas.png b/test/rendering/ol/style/expected/polygon-zindex-canvas.png
deleted file mode 100644
index 931df4a072..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-zindex-canvas.png and /dev/null differ
diff --git a/test/rendering/ol/style/expected/polygon-zindex-webgl.png b/test/rendering/ol/style/expected/polygon-zindex-webgl.png
deleted file mode 100644
index 931df4a072..0000000000
Binary files a/test/rendering/ol/style/expected/polygon-zindex-webgl.png and /dev/null differ
diff --git a/test/rendering/ol/style/polygon.test.js b/test/rendering/ol/style/polygon.test.js
deleted file mode 100644
index 50c8606c7c..0000000000
--- a/test/rendering/ol/style/polygon.test.js
+++ /dev/null
@@ -1,344 +0,0 @@
-import Feature from '../../../../src/ol/Feature.js';
-import Polygon from '../../../../src/ol/geom/Polygon.js';
-import Map from '../../../../src/ol/Map.js';
-import WebGLMap from '../../../../src/ol/WebGLMap.js';
-import View from '../../../../src/ol/View.js';
-import VectorLayer from '../../../../src/ol/layer/Vector.js';
-import WebGLVectorLayer from '../../../../src/ol/layer/Vector.js';
-import VectorSource from '../../../../src/ol/source/Vector.js';
-import Fill from '../../../../src/ol/style/Fill.js';
-import Style from '../../../../src/ol/style/Style.js';
-import Stroke from '../../../../src/ol/style/Stroke.js';
-
-
-describe('ol.rendering.style.Polygon', function() {
-
-  let map, vectorSource;
-
-  function createMap(renderer, opt_size) {
-    const MapConstructor = renderer === 'webgl' ? WebGLMap : Map;
-    const LayerConstructor = renderer === 'webgl' ? WebGLVectorLayer : VectorLayer;
-
-    const size = opt_size || 50;
-
-    vectorSource = new VectorSource();
-    const vectorLayer = new LayerConstructor({
-      source: vectorSource
-    });
-
-    map = new MapConstructor({
-      pixelRatio: 1,
-      target: createMapDiv(size, size),
-      layers: [vectorLayer],
-      view: new View({
-        projection: 'EPSG:4326',
-        center: [0, 0],
-        resolution: 1
-      })
-    });
-  }
-
-  afterEach(function() {
-    if (map) {
-      disposeMap(map);
-      map = null;
-    }
-  });
-
-  describe('different types', function() {
-
-    function createFeatures() {
-      const fill = new Fill({color: 'red'});
-
-      let feature;
-      // rectangle
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-20, 10], [-20, 20], [-5, 20], [-5, 10], [-20, 10]]
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: fill
-      }));
-      vectorSource.addFeature(feature);
-
-      // rectangle with 1 hole
-      feature = new Feature({
-        geometry: new Polygon([
-          [[0, 10], [0, 20], [15, 20], [15, 10], [0, 10]],
-          [[5, 13], [10, 13], [10, 17], [5, 17], [5, 13]]
-
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: fill
-      }));
-      vectorSource.addFeature(feature);
-
-      // rectangle with 2 holes
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-20, -20], [-20, 5], [15, 5], [15, -20], [-20, -20]],
-          [[-18, -18], [-12, -18], [-12, -12], [-18, -12], [-18, -18]],
-          [[5, -18], [12, -18], [12, -12], [5, -12], [5, -18]]
-
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: fill
-      }));
-      vectorSource.addFeature(feature);
-    }
-
-    it('tests the canvas renderer', function(done) {
-      createMap('canvas');
-      createFeatures();
-      expectResemble(map, 'rendering/ol/style/expected/polygon-types-canvas.png',
-        IMAGE_TOLERANCE, done);
-    });
-
-    where('WebGL').it('tests the webgl renderer', function(done) {
-      createMap('webgl');
-      createFeatures();
-      expectResemble(map, 'rendering/ol/style/expected/polygon-types-webgl.png',
-        IMAGE_TOLERANCE, done);
-    });
-  });
-
-  describe('different types with stroke', function() {
-
-    function createFeatures() {
-      const stroke = new Stroke({
-        width: 10,
-        color: '#000',
-        lineJoin: 'round',
-        lineCap: 'butt'
-      });
-
-      let feature;
-      // rectangle
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-20, 10], [-20, 20], [-5, 20], [-5, 10], [-20, 10]]
-        ])
-      });
-      feature.setStyle(new Style({
-        stroke: stroke
-      }));
-      vectorSource.addFeature(feature);
-
-      // rectangle with 1 hole
-      feature = new Feature({
-        geometry: new Polygon([
-          [[0, 10], [0, 20], [20, 20], [20, 10], [0, 10]],
-          [[5, 13], [10, 13], [10, 17], [5, 17], [5, 13]]
-
-        ])
-      });
-      feature.setStyle(new Style({
-        stroke: stroke
-      }));
-      vectorSource.addFeature(feature);
-
-      // rectangle with 2 holes
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-20, -20], [-20, 5], [20, 5], [20, -20], [-20, -20]],
-          [[-12, -3], [-12, -12], [-8, -12], [-8, -3], [-12, -3]],
-          [[0, -12], [13, -12], [13, -3], [0, -3], [0, -12]]
-
-        ])
-      });
-      feature.setStyle(new Style({
-        stroke: stroke
-      }));
-      vectorSource.addFeature(feature);
-    }
-
-    it('tests the canvas renderer', function(done) {
-      createMap('canvas', 100);
-      map.getView().setResolution(0.5);
-      createFeatures();
-      expectResemble(map, 'rendering/ol/style/expected/polygon-types-canvas-stroke.png',
-        IMAGE_TOLERANCE, done);
-    });
-
-    where('WebGL').it('tests the webgl renderer', function(done) {
-      createMap('webgl', 100);
-      map.getView().setResolution(0.5);
-      createFeatures();
-      expectResemble(map, 'rendering/ol/style/expected/polygon-types-webgl-stroke.png',
-        IMAGE_TOLERANCE, done);
-    });
-  });
-
-  describe('z-index', function() {
-
-    function createFeatures() {
-      let feature;
-      // rectangle with z-index 2
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-20, 10], [-20, 20], [-0, 20], [-0, 10], [-20, 10]]
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: new Fill({color: '#E31E10'}),
-        zIndex: 2
-      }));
-      vectorSource.addFeature(feature);
-
-      // rectangle with z-index 3
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-15, 5], [-15, 15], [5, 15], [5, 5], [-15, 5]]
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: new Fill({color: '#1A5E42'}),
-        zIndex: 3
-      }));
-      vectorSource.addFeature(feature);
-
-      // rectangle with z-index 1
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-10, 0], [-10, 10], [10, 10], [10, 0], [-10, 0]]
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: new Fill({color: '#DEDE21'}),
-        zIndex: 1
-      }));
-      vectorSource.addFeature(feature);
-
-    }
-
-    it('tests the canvas renderer', function(done) {
-      createMap('canvas');
-      createFeatures();
-      expectResemble(map, 'rendering/ol/style/expected/polygon-zindex-canvas.png',
-        IMAGE_TOLERANCE, done);
-    });
-
-    where('WebGL').it('tests the webgl renderer', function(done) {
-      createMap('webgl');
-      createFeatures();
-      expectResemble(map, 'rendering/ol/style/expected/polygon-zindex-webgl.png',
-        IMAGE_TOLERANCE, done);
-    });
-  });
-
-  describe('different fills and strokes', function() {
-
-    function createFeatures() {
-      let feature;
-      // rectangle
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-20, 10], [-20, 20], [-5, 20], [-5, 10], [-20, 10]]
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: new Fill({color: '#9696EB'}),
-        stroke: new Stroke({color: '#9696EB', width: 1})
-      }));
-      vectorSource.addFeature(feature);
-
-      // rectangle with 1 hole
-      feature = new Feature({
-        geometry: new Polygon([
-          [[0, 10], [0, 20], [15, 20], [15, 10], [0, 10]]
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: new Fill({color: 'rgba(255, 0, 0, 0.1)'}),
-        stroke: new Stroke({color: '#DE213A', width: 3})
-      }));
-      vectorSource.addFeature(feature);
-
-      // rectangle with 2 holes
-      feature = new Feature({
-        geometry: new Polygon([
-          [[-20, -20], [-20, 5], [15, 5], [15, -20], [-20, -20]]
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: new Fill({color: 'rgba(18, 204, 105, 0.3)'}),
-        stroke: new Stroke({color: '#032E17', width: 2})
-      }));
-      vectorSource.addFeature(feature);
-    }
-
-    it('tests the canvas renderer', function(done) {
-      createMap('canvas');
-      createFeatures();
-      expectResemble(
-        map, 'rendering/ol/style/expected/polygon-fill-and-strokes-canvas.png',
-        IMAGE_TOLERANCE, done);
-    });
-
-    where('WebGL').it('tests the webgl renderer', function(done) {
-      createMap('webgl');
-      createFeatures();
-      expectResemble(
-        map, 'rendering/ol/style/expected/polygon-fill-and-strokes-webgl.png',
-        5.76, done);
-    });
-  });
-
-  describe('CanvasPattern and LinearGradient as fills and strokes', function() {
-
-    function createRainbowGradient() {
-      const canvas = document.createElement('canvas');
-      const context = canvas.getContext('2d');
-      const gradient = context.createLinearGradient(0, 0, 30, 0);
-      gradient.addColorStop(0, 'red');
-      gradient.addColorStop(1 / 6, 'orange');
-      gradient.addColorStop(2 / 6, 'yellow');
-      gradient.addColorStop(3 / 6, 'green');
-      gradient.addColorStop(4 / 6, 'aqua');
-      gradient.addColorStop(5 / 6, 'blue');
-      gradient.addColorStop(1, 'purple');
-      return gradient;
-    }
-
-    function createPattern() {
-      const canvas = document.createElement('canvas');
-      const context = canvas.getContext('2d');
-      canvas.width = 11;
-      canvas.height = 11;
-      context.fillStyle = 'rgba(102, 0, 102, 0.5)';
-      context.beginPath();
-      context.arc(5, 5, 4, 0, 2 * Math.PI);
-      context.fill();
-      context.fillStyle = 'rgb(55, 0, 170)';
-      context.beginPath();
-      context.arc(5, 5, 2, 0, 2 * Math.PI);
-      context.fill();
-      return context.createPattern(canvas, 'repeat');
-    }
-
-    function createFeatures() {
-      const feature = new Feature({
-        geometry: new Polygon([
-          [[-20, -20], [-20, 20], [18, 20], [-20, -20]]
-        ])
-      });
-      feature.setStyle(new Style({
-        fill: new Fill({color: createPattern()}),
-        stroke: new Stroke({color: createRainbowGradient(), width: 3})
-      }));
-      vectorSource.addFeature(feature);
-    }
-
-    it('tests the canvas renderer', function(done) {
-      createMap('canvas');
-      createFeatures();
-      expectResemble(
-        map, 'rendering/ol/style/expected/polygon-pattern-gradient-canvas.png',
-        2.75, done);
-    });
-  });
-
-});