diff --git a/extensions/notebook/package.json b/extensions/notebook/package.json
index 7d3d5b79a4..0994bd7694 100644
--- a/extensions/notebook/package.json
+++ b/extensions/notebook/package.json
@@ -664,6 +664,7 @@
     "fast-glob": "^3.1.0",
     "fs-extra": "^5.0.0",
     "glob": "^7.1.1",
+    "js-yaml": "^3.12.1",
     "node-fetch": "^2.6.1",
     "request": "^2.88.0",
     "tar": "^6.0.1",
diff --git a/extensions/notebook/src/book/bookVersionHandler.ts b/extensions/notebook/src/book/bookVersionHandler.ts
index 3548351731..bf292a252d 100644
--- a/extensions/notebook/src/book/bookVersionHandler.ts
+++ b/extensions/notebook/src/book/bookVersionHandler.ts
@@ -89,7 +89,7 @@ export function convertTo(version: string, section: JupyterBookSection): Jupyter
 			temp.external = section.external;
 			temp.sections = [];
 			for (let s of section.sections) {
-				const child = this.convertTo(version, s);
+				const child = convertTo(version, s);
 				temp.sections.push(child);
 			}
 			return temp;
@@ -120,7 +120,7 @@ export function convertTo(version: string, section: JupyterBookSection): Jupyter
 			temp.url = section.url;
 			temp.sections = [];
 			for (let s of section.sections) {
-				const child = this.convertTo(version, s);
+				const child = convertTo(version, s);
 				temp.sections.push(child);
 			}
 			return temp;
diff --git a/extensions/notebook/src/test/book/bookTocManager.test.ts b/extensions/notebook/src/test/book/bookTocManager.test.ts
index b038435458..21e69ea2b4 100644
--- a/extensions/notebook/src/test/book/bookTocManager.test.ts
+++ b/extensions/notebook/src/test/book/bookTocManager.test.ts
@@ -459,7 +459,7 @@ describe('BookTocManagerTests', function () {
 				});
 
 
-				it.skip('Add section to book', async () => { // TODO: chgagnon Fix from vscode merge
+				it('Add section to book', async () => {
 					bookTocManager = new BookTocManager(sourceBookModel, targetBookModel);
 					await bookTocManager.updateBook(sectionA, targetBook, undefined);
 					const listFiles = await fs.promises.readdir(path.join(run.targetBook.bookContentFolderPath, 'sectionA'));
@@ -468,7 +468,7 @@ describe('BookTocManagerTests', function () {
 					should(JSON.stringify(listFiles)).be.equal(JSON.stringify(['notebook1.ipynb', 'notebook2.ipynb', 'readme.md']), 'The files of the section should be moved to the target book folder');
 				});
 
-				it.skip('Add section to section', async () => { // TODO: chgagnon Fix from vscode merge
+				it('Add section to section', async () => {
 					bookTocManager = new BookTocManager(sourceBookModel, targetBookModel);
 					await bookTocManager.updateBook(sectionB, sectionC, {
 						'title': 'Notebook 6',
diff --git a/extensions/notebook/yarn.lock b/extensions/notebook/yarn.lock
index 6061df60c9..6b7d15dcc1 100644
--- a/extensions/notebook/yarn.lock
+++ b/extensions/notebook/yarn.lock
@@ -500,6 +500,13 @@ applicationinsights@1.7.4:
     diagnostic-channel "0.2.0"
     diagnostic-channel-publishers "^0.3.3"
 
+argparse@^1.0.7:
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/argparse/-/argparse-1.0.10.tgz#bcd6791ea5ae09725e17e5ad988134cd40b3d911"
+  integrity sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==
+  dependencies:
+    sprintf-js "~1.0.2"
+
 asn1@~0.2.3:
   version "0.2.4"
   resolved "https://registry.yarnpkg.com/asn1/-/asn1-0.2.4.tgz#8d2475dfab553bb33e77b54e59e880bb8ce23136"
@@ -803,6 +810,11 @@ esprima@^2.7.0:
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
   integrity sha1-luO3DVd59q1JzQMmc9HDEnZ7pYE=
 
+esprima@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
+  integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
+
 extend@~3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
@@ -1124,6 +1136,14 @@ js-tokens@^4.0.0:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
   integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
 
+js-yaml@^3.12.1:
+  version "3.14.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.14.1.tgz#dae812fdb3825fa306609a8717383c50c36a0537"
+  integrity sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==
+  dependencies:
+    argparse "^1.0.7"
+    esprima "^4.0.0"
+
 jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
@@ -1633,6 +1653,11 @@ source-map@^0.6.1:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
 
+sprintf-js@~1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
+  integrity sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=
+
 sshpk@^1.7.0:
   version "1.16.1"
   resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.16.1.tgz#fb661c0bef29b39db40769ee39fa70093d6f6877"