diff --git a/__tests__/testChallenges/challengeDocumentReady.test.js b/__tests__/finishedTestChallenges/documentReady.test.js
similarity index 100%
rename from __tests__/testChallenges/challengeDocumentReady.test.js
rename to __tests__/finishedTestChallenges/documentReady.test.js
diff --git a/__tests__/testChallenges/challengeGetElementById.test.js b/__tests__/finishedTestChallenges/getElementById.test.js
similarity index 100%
rename from __tests__/testChallenges/challengeGetElementById.test.js
rename to __tests__/finishedTestChallenges/getElementById.test.js
diff --git a/__tests__/main.test.js b/__tests__/main.test.js
index a2854c2..d8bbe53 100644
--- a/__tests__/main.test.js
+++ b/__tests__/main.test.js
@@ -6,7 +6,7 @@ const { vanilla } = require('../lib/vanilla');
 const loadFileToBuffer = require('../lib/loadFileToBuffer');
 
 describe("Test command 'vanilla'", () => {
-  const testNames = ['documentReady'];
+  const testNames = ['documentReady', 'getElementById'];
 
   testNames.forEach((testName) => {
     test(`Vanillaize '${testName}'`, async () => {
diff --git a/__tests__/testChallenges/challengeAppendElement.test.js b/__tests__/pendingTestChallenges/children.test.js
similarity index 89%
rename from __tests__/testChallenges/challengeAppendElement.test.js
rename to __tests__/pendingTestChallenges/children.test.js
index 0179238..ff0ef62 100644
--- a/__tests__/testChallenges/challengeAppendElement.test.js
+++ b/__tests__/pendingTestChallenges/children.test.js
@@ -1,12 +1,12 @@
 /**
- * Test function vanilla on case 'appendElement'
+ * Test function vanilla on case 'children'
  */
 
 const { vanilla } = require('../../lib/vanilla');
 const loadFileToBuffer = require('../../lib/loadFileToBuffer');
 
 describe("Test command 'vanilla' on test challenges", () => {
-  const testName = 'appendElement';
+  const testName = 'children';
 
   test(`Vanillaize '${testName}'`, async () => {
     // Input
diff --git a/__tests__/testChallenges/challengeCloneElement.test.js b/__tests__/pendingTestChallenges/cloneElement.test.js
similarity index 100%
rename from __tests__/testChallenges/challengeCloneElement.test.js
rename to __tests__/pendingTestChallenges/cloneElement.test.js
diff --git a/__tests__/testChallenges/challengeCreateElement.test.js b/__tests__/pendingTestChallenges/createElement.test.js
similarity index 100%
rename from __tests__/testChallenges/challengeCreateElement.test.js
rename to __tests__/pendingTestChallenges/createElement.test.js
diff --git a/__tests__/pendingTestChallenges/getElementsByClassName.test.js b/__tests__/pendingTestChallenges/getElementsByClassName.test.js
new file mode 100644
index 0000000..d8da942
--- /dev/null
+++ b/__tests__/pendingTestChallenges/getElementsByClassName.test.js
@@ -0,0 +1,31 @@
+/**
+ * Test function vanilla on case 'getElementsByClassName'
+ */
+
+const { vanilla } = require('../../lib/vanilla');
+const loadFileToBuffer = require('../../lib/loadFileToBuffer');
+
+describe("Test command 'vanilla' on test challenges", () => {
+  const testName = 'getElementsByClassName';
+
+  test(`Vanillaize '${testName}'`, async () => {
+    // Input
+    const argv = {
+      _: ['vanilla', `./__tests__/testCases/${testName}.js`],
+      C: true,
+      'no-cache': true,
+      noCache: true,
+      $0: 'vaniquery',
+    };
+
+    // Output
+    const output = await vanilla(argv);
+
+    // Answer key
+    const answerKeyFile = `./__tests__/testCases/${testName}.answerkey.js`;
+    const answerKey = await loadFileToBuffer(answerKeyFile);
+
+    // Expect
+    expect(output).toEqual(answerKey);
+  });
+});
diff --git a/__tests__/pendingTestChallenges/getElementsByTagName.test.js b/__tests__/pendingTestChallenges/getElementsByTagName.test.js
new file mode 100644
index 0000000..f4164da
--- /dev/null
+++ b/__tests__/pendingTestChallenges/getElementsByTagName.test.js
@@ -0,0 +1,31 @@
+/**
+ * Test function vanilla on case 'getElementsByTagName'
+ */
+
+const { vanilla } = require('../../lib/vanilla');
+const loadFileToBuffer = require('../../lib/loadFileToBuffer');
+
+describe("Test command 'vanilla' on test challenges", () => {
+  const testName = 'getElementsByTagName';
+
+  test(`Vanillaize '${testName}'`, async () => {
+    // Input
+    const argv = {
+      _: ['vanilla', `./__tests__/testCases/${testName}.js`],
+      C: true,
+      'no-cache': true,
+      noCache: true,
+      $0: 'vaniquery',
+    };
+
+    // Output
+    const output = await vanilla(argv);
+
+    // Answer key
+    const answerKeyFile = `./__tests__/testCases/${testName}.answerkey.js`;
+    const answerKey = await loadFileToBuffer(answerKeyFile);
+
+    // Expect
+    expect(output).toEqual(answerKey);
+  });
+});
diff --git a/__tests__/testChallenges/challengeParent.test.js b/__tests__/pendingTestChallenges/parent.test.js
similarity index 100%
rename from __tests__/testChallenges/challengeParent.test.js
rename to __tests__/pendingTestChallenges/parent.test.js
diff --git a/__tests__/testChallenges/challengeSelectAll.test.js b/__tests__/pendingTestChallenges/selectAll.test.js
similarity index 100%
rename from __tests__/testChallenges/challengeSelectAll.test.js
rename to __tests__/pendingTestChallenges/selectAll.test.js
diff --git a/__tests__/pendingTestChallenges/selectAllAttribute.test.js b/__tests__/pendingTestChallenges/selectAllAttribute.test.js
new file mode 100644
index 0000000..c976035
--- /dev/null
+++ b/__tests__/pendingTestChallenges/selectAllAttribute.test.js
@@ -0,0 +1,31 @@
+/**
+ * Test function vanilla on case 'selectAllAttribute'
+ */
+
+const { vanilla } = require('../../lib/vanilla');
+const loadFileToBuffer = require('../../lib/loadFileToBuffer');
+
+describe("Test command 'vanilla' on test challenges", () => {
+  const testName = 'selectAllAttribute';
+
+  test(`Vanillaize '${testName}'`, async () => {
+    // Input
+    const argv = {
+      _: ['vanilla', `./__tests__/testCases/${testName}.js`],
+      C: true,
+      'no-cache': true,
+      noCache: true,
+      $0: 'vaniquery',
+    };
+
+    // Output
+    const output = await vanilla(argv);
+
+    // Answer key
+    const answerKeyFile = `./__tests__/testCases/${testName}.answerkey.js`;
+    const answerKey = await loadFileToBuffer(answerKeyFile);
+
+    // Expect
+    expect(output).toEqual(answerKey);
+  });
+});
diff --git a/__tests__/pendingTestChallenges/selectAllPseudoClass.test.js b/__tests__/pendingTestChallenges/selectAllPseudoClass.test.js
new file mode 100644
index 0000000..22d60e3
--- /dev/null
+++ b/__tests__/pendingTestChallenges/selectAllPseudoClass.test.js
@@ -0,0 +1,31 @@
+/**
+ * Test function vanilla on case 'selectAllPseudoClass'
+ */
+
+const { vanilla } = require('../../lib/vanilla');
+const loadFileToBuffer = require('../../lib/loadFileToBuffer');
+
+describe("Test command 'vanilla' on test challenges", () => {
+  const testName = 'selectAllPseudoClass';
+
+  test(`Vanillaize '${testName}'`, async () => {
+    // Input
+    const argv = {
+      _: ['vanilla', `./__tests__/testCases/${testName}.js`],
+      C: true,
+      'no-cache': true,
+      noCache: true,
+      $0: 'vaniquery',
+    };
+
+    // Output
+    const output = await vanilla(argv);
+
+    // Answer key
+    const answerKeyFile = `./__tests__/testCases/${testName}.answerkey.js`;
+    const answerKey = await loadFileToBuffer(answerKeyFile);
+
+    // Expect
+    expect(output).toEqual(answerKey);
+  });
+});
diff --git a/__tests__/testCases/appendElement.answerkey.js b/__tests__/testCases/appendElement.answerkey.js
deleted file mode 100644
index 098724b..0000000
--- a/__tests__/testCases/appendElement.answerkey.js
+++ /dev/null
@@ -1 +0,0 @@
-document.body.appendChild(document.createElement('p'));
diff --git a/__tests__/testCases/appendElement.js b/__tests__/testCases/appendElement.js
deleted file mode 100644
index 8b6f8f9..0000000
--- a/__tests__/testCases/appendElement.js
+++ /dev/null
@@ -1 +0,0 @@
-$('body').append($('<p/>'));
diff --git a/__tests__/testCases/children.answer.js b/__tests__/testCases/children.answer.js
new file mode 100644
index 0000000..5874f5c
--- /dev/null
+++ b/__tests__/testCases/children.answer.js
@@ -0,0 +1,3 @@
+document.getElementById('my-parent').children;
+
+var child = ocument.getElementById('another-parent').children();
diff --git a/__tests__/testCases/children.js b/__tests__/testCases/children.js
new file mode 100644
index 0000000..e1b9e2d
--- /dev/null
+++ b/__tests__/testCases/children.js
@@ -0,0 +1,3 @@
+$('#my-parent').children();
+
+var child = $('#another-parent').children();
diff --git a/__tests__/testCases/getElementsByClassName.answerkey.js b/__tests__/testCases/getElementsByClassName.answerkey.js
new file mode 100644
index 0000000..84b028d
--- /dev/null
+++ b/__tests__/testCases/getElementsByClassName.answerkey.js
@@ -0,0 +1 @@
+document.getElementsByClassName('my-class');
diff --git a/__tests__/testCases/getElementsByClassName.js b/__tests__/testCases/getElementsByClassName.js
new file mode 100644
index 0000000..9e37d0e
--- /dev/null
+++ b/__tests__/testCases/getElementsByClassName.js
@@ -0,0 +1 @@
+$('.my-class');
diff --git a/__tests__/testCases/getElementsByTagName.answerkey.js b/__tests__/testCases/getElementsByTagName.answerkey.js
new file mode 100644
index 0000000..4d81c16
--- /dev/null
+++ b/__tests__/testCases/getElementsByTagName.answerkey.js
@@ -0,0 +1 @@
+document.getElementsByTagName('div');
diff --git a/__tests__/testCases/getElementsByTagName.js b/__tests__/testCases/getElementsByTagName.js
new file mode 100644
index 0000000..e5ad510
--- /dev/null
+++ b/__tests__/testCases/getElementsByTagName.js
@@ -0,0 +1 @@
+$('div');
diff --git a/__tests__/testCases/selectAll.answerkey.js b/__tests__/testCases/selectAll.answerkey.js
index 1c9ee30..0c7b9a9 100644
--- a/__tests__/testCases/selectAll.answerkey.js
+++ b/__tests__/testCases/selectAll.answerkey.js
@@ -1,3 +1,5 @@
 document.querySelectorAll(".box");
 
 var divs = document.querySelectorAll('div');
+
+document.querySelectorAll('[data-foo-bar="someval"]');
diff --git a/__tests__/testCases/selectAll.js b/__tests__/testCases/selectAll.js
index 9600b61..20baf72 100644
--- a/__tests__/testCases/selectAll.js
+++ b/__tests__/testCases/selectAll.js
@@ -1,3 +1,5 @@
 $(".box");
 
 var divs = $('div');
+
+$('[data-foo-bar="someval"]');
diff --git a/__tests__/testCases/selectAllAttribute.answer.js b/__tests__/testCases/selectAllAttribute.answer.js
new file mode 100644
index 0000000..71a185c
--- /dev/null
+++ b/__tests__/testCases/selectAllAttribute.answer.js
@@ -0,0 +1 @@
+document.querySelectorAll('[data-foo-bar="someval"]');
diff --git a/__tests__/testCases/selectAllAttribute.js b/__tests__/testCases/selectAllAttribute.js
new file mode 100644
index 0000000..f55e868
--- /dev/null
+++ b/__tests__/testCases/selectAllAttribute.js
@@ -0,0 +1 @@
+$('[data-foo-bar="someval"]');
diff --git a/__tests__/testCases/selectAllPseudoClass.answerkey.js b/__tests__/testCases/selectAllPseudoClass.answerkey.js
new file mode 100644
index 0000000..575e2ae
--- /dev/null
+++ b/__tests__/testCases/selectAllPseudoClass.answerkey.js
@@ -0,0 +1 @@
+document.querySelectorAll('#myForm:invalid');
diff --git a/__tests__/testCases/selectAllPseudoClass.js b/__tests__/testCases/selectAllPseudoClass.js
new file mode 100644
index 0000000..5d3d5f2
--- /dev/null
+++ b/__tests__/testCases/selectAllPseudoClass.js
@@ -0,0 +1 @@
+$('#myForm:invalid');
diff --git a/lib/equivalentsLib.js b/lib/equivalentsLib.js
index b8639f6..e49af16 100644
--- a/lib/equivalentsLib.js
+++ b/lib/equivalentsLib.js
@@ -3,11 +3,6 @@
  */
 
 module.exports = [
-  {
-    name: 'appendElement',
-    jquery: /$^/,
-    vanilla: '',
-  },
   {
     name: 'cloneElement',
     jquery: /$^/,