diff --git a/src/plugins/minimap/index.ts b/src/plugins/minimap/index.ts
index 3cdfcc22a7..3a18437ee9 100644
--- a/src/plugins/minimap/index.ts
+++ b/src/plugins/minimap/index.ts
@@ -426,8 +426,6 @@ export default class MiniMap extends Base {
       case DELEGATE_MODE:
         this.updateDelegateShapes();
         break;
-      default:
-        this.updateGraphShapes();
     }
 
     const group = canvas.get('children')[0];
diff --git a/tests/unit/plugins/minimap-spec.ts b/tests/unit/plugins/minimap-spec.ts
index e9fcc5ae6e..57ff195e69 100644
--- a/tests/unit/plugins/minimap-spec.ts
+++ b/tests/unit/plugins/minimap-spec.ts
@@ -5,6 +5,7 @@ const div = document.createElement('div');
 div.id = 'minimap';
 document.body.appendChild(div);
 const container = document.createElement('div');
+container.id = 'minimap-container';
 div.appendChild(container);
 
 describe('minimap', () => {
@@ -170,7 +171,58 @@ describe('minimap', () => {
     expect(matrix2[4]).toEqual(2);
     expect(matrix2[6]).toEqual(0);
     expect(matrix2[7]).toEqual(0);
-    // graph.destroy();
+
+    Simulate.simulate(container, 'mouseleave', {
+      clientX: -100,
+      clientY: -100
+    });
+    graph.destroy();
+  });
+  it('invalid dom event', () => {
+    const minimap = new G6.Minimap({ size: [200, 200] });
+    const graph = new G6.Graph({
+      container: div,
+      width: 500,
+      height: 500,
+      plugins: [minimap],
+      modes: {
+        default: ['zoom-canvas']
+      }
+    });
+    const data = {
+      nodes: [{
+        id: '1',
+        x: 50,
+        y: 80
+      }, {
+        id: '2',
+        x: 140,
+        y: 100
+      }],
+      edges: [{
+        source: '1',
+        target: '2'
+      }]
+    }
+    graph.data(data);
+    graph.render();
+
+    const viewport = minimap.getContainer();
+    const canvas = minimap.getCanvas();
+
+    const container = canvas.get('container');
+
+    Simulate.simulate(container, 'mousemove', {
+      clientX: 100,
+      clientY: 100,
+    });
+
+    viewport.style.width = '300px';
+    Simulate.simulate(viewport, 'mousedown', {
+      clientX: 100,
+      clientY: 100,
+      target: null,
+    });
   });
   it('delegate type of minimap', () => {
     const minimap = new G6.Minimap({
@@ -290,4 +342,33 @@ describe('minimap', () => {
     expect(shapeGroup[2].get('children').length).toEqual(1);
     graph.destroy();
   });
+  it('get minimap container', () => {
+    const minimap = new G6.Minimap({ size: [200, 200], type: 'keyShape' });
+    const graph = new G6.Graph({
+      container: div,
+      width: 500,
+      height: 500,
+      plugins: [minimap],
+    });
+
+    const container = minimap.getContainer();
+    expect(container).not.toBe(undefined);
+    expect(container.className).toBe('g6-minimap');
+    graph.destroy();
+  });
+  it('minimap beforeanimate afteranimate', () => {
+    const minimap = new G6.Minimap({ size: [200, 200] });
+    const graph = new G6.Graph({
+      container: div,
+      width: 500,
+      height: 500,
+      plugins: [minimap],
+    });
+
+    graph.emit('beforeanimate');
+    expect(minimap.get('refresh')).toBe(false);
+    graph.emit('afteranimate');
+    expect(minimap.get('refresh')).toBe(true);
+    graph.destroy();
+  });
 });
diff --git a/tests/unit/util/math-spec.ts b/tests/unit/util/math-spec.ts
index f83ced4317..a3b8958b30 100644
--- a/tests/unit/util/math-spec.ts
+++ b/tests/unit/util/math-spec.ts
@@ -9,7 +9,12 @@ import {
   getRectIntersectByPoint,
   invertMatrix,
   scaleMatrix,
+  scale,
+  rotate,
 } from '../../../src/util/math';
+import { Graph } from '../../../src';
+import Canvas from '@antv/g-canvas/lib/canvas';
+
 
 const equal = (a: number, b: number): boolean => Math.abs(a - b) < 0.0001;
 
@@ -145,6 +150,16 @@ describe('math util test', () => {
     expect(dis).toEqual(7.0710678118654755);
   });
 
+  it('applyMatrix with null matrix', () => {
+    const point = {
+      x: 10,
+      y: 15,
+    };
+
+    const p = applyMatrix(point, null, 0);
+    expect(p).toEqual({ x: 10, y: 15 });
+  });
+
   it('applyMatrix tag = 0', () => {
     const point = {
       x: 10,
@@ -167,6 +182,16 @@ describe('math util test', () => {
     expect(p).toEqual({ x: 32, y: 14 });
   });
 
+  it('invertMatrix with null matrix', () => {
+    const point = {
+      x: 30,
+      y: 10,
+    };
+
+    const p = invertMatrix(point, null, 0);
+    expect(p).toEqual({ x: 30, y: 10 });
+  });
+
   it('invertMatrix tag = 0', () => {
     const point = {
       x: 30,
@@ -284,4 +309,26 @@ describe('math util test', () => {
     expect(result[1]).toEqual([1, 0, 1]);
     expect(result[2]).toEqual([1, 2, 0]);
   });
+  it('scale and rotate', () => {
+    const div = document.createElement('div');
+    div.id = 'edge-shape';
+    document.body.appendChild(div);
+    const canvas = new Canvas({
+      container: 'edge-shape',
+      width: 600,
+      height: 600,
+    });
+    const group = canvas.addGroup();
+    scale(group, 0.5);
+    const matrix = group.getMatrix();
+    expect(matrix[0]).toBe(0.5);
+    scale(group, 0.5);
+    const matrix2 = group.getMatrix();
+    expect(matrix2[0]).toBe(0.25);
+    rotate(group, 1.3);
+    const matrix3 = group.getMatrix();
+    expect(matrix3[0]).toBe(0.06687470715614684);
+    expect(matrix3[1]).toBe(0.24088954635429824);
+    expect(matrix3[3]).toBe(-0.24088954635429824);
+  });
 });