diff --git a/test/fixture/package/src/ExponentiationOperator/Definition.js b/test/fixture/package/src/ExponentiationOperator/Definition.js
new file mode 100644
index 00000000..427e0192
--- /dev/null
+++ b/test/fixture/package/src/ExponentiationOperator/Definition.js
@@ -0,0 +1,12 @@
+/**
+ * this is TestExponentiationOperatorDefinition.
+ */
+export default class TestExponentiationOperatorDefinition {
+  /**
+   * this is method1.
+   * @return {number}
+   */
+  method1(){
+    return 2 ** 3 ;
+  }
+}
diff --git a/test/src/HTMLTest/CoverageTest/CoverageTest.js b/test/src/HTMLTest/CoverageTest/CoverageTest.js
index 8bda6c7a..a19409a6 100644
--- a/test/src/HTMLTest/CoverageTest/CoverageTest.js
+++ b/test/src/HTMLTest/CoverageTest/CoverageTest.js
@@ -9,8 +9,8 @@ describe('test coverage', ()=> {
   it('has coverage summary', ()=> {
     assert(badge.includes('79%'));
     assert.includes(doc, '[data-ice="coverageBadge"]', './badge.svg', 'src');
-    assert.includes(doc, '[data-ice="totalCoverageCount"]', '258/325');
-    assert.equal(doc.find('[data-ice="file"] [data-ice="coverage"]').length, 114);
+    assert.includes(doc, '[data-ice="totalCoverageCount"]', '260/327');
+    assert.equal(doc.find('[data-ice="file"] [data-ice="coverage"]').length, 115);
   });
 
   /* eslint-disable max-statements */
@@ -55,6 +55,7 @@ describe('test coverage', ()=> {
     test('file/src/Experimental/Class.js.html', '100 %4/4');
     test('file/src/Experimental/Function.js.html', '100 %1/1');
     test('file/src/Experimental/Variable.js.html', '100 %1/1');
+    test('file/src/ExponentiationOperator/Definition.js.html', '100 %2/2');
     test('file/src/Export/AnonymousClass.js.html', '100 %1/1');
     test('file/src/Export/AnonymousFunction.js.html', '100 %1/1');
     test('file/src/Export/Class.js.html#errorLines=24', '80 %4/5');
@@ -138,6 +139,6 @@ describe('test coverage', ()=> {
     test('file/src/Version/Function.js.html', '100 %1/1');
     test('file/src/Version/Variable.js.html', '100 %1/1');
 
-    assert.equal(count, 114);
+    assert.equal(count, 115);
   });
 });
diff --git a/test/src/HTMLTest/DocumentTest/ExponentialOperatorTest/DefinitionTest.js b/test/src/HTMLTest/DocumentTest/ExponentialOperatorTest/DefinitionTest.js
new file mode 100644
index 00000000..f9764e13
--- /dev/null
+++ b/test/src/HTMLTest/DocumentTest/ExponentialOperatorTest/DefinitionTest.js
@@ -0,0 +1,28 @@
+import {readDoc, assert, findParent} from './../../../util.js';
+
+/** @test {ESParser} */
+describe('TestExponentiationOperatorDefinition', ()=> {
+  const doc = readDoc('class/src/ExponentiationOperator/Definition.js~TestExponentiationOperatorDefinition.html');
+
+  describe('in self detail', ()=> {
+    it('has desc.', ()=> {
+      assert.includes(doc, '.self-detail [data-ice="description"]', 'this is TestExponentiationOperatorDefinition.');
+    });
+  });
+
+  describe('in summary', ()=> {
+    it('has desc', ()=> {
+      findParent(doc, '[data-ice="summary"] [href$="#instance-method-method1"]', '[data-ice="target"]', (doc)=> {
+        assert.includes(doc, '[data-ice="description"]', 'this is method1.');
+      });
+    });
+  });
+
+  describe('in details', ()=>{
+    it('has desc.', ()=>{
+      findParent(doc, '[id="instance-method-method1"]', '[data-ice="detail"]', (doc)=>{
+        assert.includes(doc, '[data-ice="description"]', 'this is method1.');
+      });
+    });
+  });
+});