diff --git a/plugins/app-backend/src/lib/config.test.ts b/plugins/app-backend/src/lib/config.test.ts
index 95b34c8422..4018766ac9 100644
--- a/plugins/app-backend/src/lib/config.test.ts
+++ b/plugins/app-backend/src/lib/config.test.ts
@@ -36,7 +36,7 @@ const baseOptions = {
 
 describe('injectConfig', () => {
   beforeEach(() => {
-    fsMock.readdir.mockResolvedValue(['main.js']);
+    fsMock.readdir.mockResolvedValue(['main.js'] as any);
   });
 
   afterEach(() => {
@@ -44,7 +44,7 @@ describe('injectConfig', () => {
   });
 
   it('should inject without config', async () => {
-    fsMock.readdir.mockResolvedValue(['main.js']);
+    fsMock.readdir.mockResolvedValue(['main.js'] as any);
     readFileMock.mockImplementation(
       async () => '"__APP_INJECTED_RUNTIME_CONFIG__"',
     );
@@ -68,7 +68,7 @@ describe('injectConfig', () => {
       'not-js.txt',
       'main.js',
       'after.js',
-    ]);
+    ] as any);
     readFileMock.mockImplementation(async (file: string) => {
       if (file.endsWith('main.js')) {
         return '"__APP_INJECTED_RUNTIME_CONFIG__"';
@@ -111,7 +111,7 @@ describe('injectConfig', () => {
   });
 
   it('should re-inject config', async () => {
-    fsMock.readdir.mockResolvedValue(['main.js']);
+    fsMock.readdir.mockResolvedValue(['main.js'] as any);
     readFileMock.mockResolvedValue(
       'JSON.parse("__APP_INJECTED_RUNTIME_CONFIG__")',
     );
diff --git a/plugins/scaffolder-backend/src/scaffolder/stages/templater/cookiecutter.test.ts b/plugins/scaffolder-backend/src/scaffolder/stages/templater/cookiecutter.test.ts
index 537aac3088..763572fda5 100644
--- a/plugins/scaffolder-backend/src/scaffolder/stages/templater/cookiecutter.test.ts
+++ b/plugins/scaffolder-backend/src/scaffolder/stages/templater/cookiecutter.test.ts
@@ -48,7 +48,7 @@ describe('CookieCutter Templater', () => {
       },
     };
 
-    jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing']);
+    jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing'] as any);
 
     const templater = new CookieCutter();
     await templater.run({
@@ -72,7 +72,7 @@ describe('CookieCutter Templater', () => {
     jest
       .spyOn(fs, 'readJSON')
       .mockImplementationOnce(() => Promise.resolve(existingJson));
-    jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing']);
+    jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing'] as any);
 
     const values = {
       owner: 'blobby',
@@ -135,12 +135,10 @@ describe('CookieCutter Templater', () => {
       },
     };
 
-    jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing']);
+    jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing'] as any);
     jest
       .spyOn(fs, 'realpath')
-      .mockImplementation((filePath: string | Buffer) =>
-        Promise.resolve(filePath as string),
-      );
+      .mockImplementation(x => Promise.resolve(x.toString()));
 
     const templater = new CookieCutter();
     await templater.run({
@@ -182,7 +180,7 @@ describe('CookieCutter Templater', () => {
       },
     };
 
-    jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing']);
+    jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing'] as any);
 
     const templater = new CookieCutter();
     await templater.run({
@@ -226,7 +224,7 @@ describe('CookieCutter Templater', () => {
         },
       };
 
-      jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing']);
+      jest.spyOn(fs, 'readdir').mockResolvedValueOnce(['newthing'] as any);
       commandExists.mockImplementationOnce(() => () => true);
 
       const templater = new CookieCutter();
diff --git a/yarn.lock b/yarn.lock
index 370f3f5a7f..c9843dfdc7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6195,24 +6195,10 @@
   dependencies:
     "@types/node" "*"
 
-"@types/fs-extra@^9.0.1":
-  version "9.0.1"
-  resolved "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-9.0.1.tgz#91c8fc4c51f6d5dbe44c2ca9ab09310bd00c7918"
-  integrity sha512-B42Sxuaz09MhC3DDeW5kubRcQ5by4iuVQ0cRRWM2lggLzAa/KVom0Aft/208NgMvNQQZ86s5rVcqDdn/SH0/mg==
-  dependencies:
-    "@types/node" "*"
-
-"@types/fs-extra@^9.0.3":
-  version "9.0.3"
-  resolved "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-9.0.3.tgz#9996e5cce993508c32325380b429f04a1327523e"
-  integrity sha512-NKdGoXLTFTRED3ENcfCsH8+ekV4gbsysanx2OPbstXVV6fZMgUCqTxubs6I9r7pbOJbFgVq1rpFtLURjKCZWUw==
-  dependencies:
-    "@types/node" "*"
-
-"@types/fs-extra@^9.0.5":
-  version "9.0.5"
-  resolved "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-9.0.5.tgz#2afb76a43a4bef80a363b94b314d0ca1694fc4f8"
-  integrity sha512-wr3t7wIW1c0A2BIJtdVp4EflriVaVVAsCAIHVzzh8B+GiFv9X1xeJjCs4upRXtzp7kQ6lP5xvskjoD4awJ1ZeA==
+"@types/fs-extra@^9.0.1", "@types/fs-extra@^9.0.3", "@types/fs-extra@^9.0.5":
+  version "9.0.8"
+  resolved "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-9.0.8.tgz#32c3c07ddf8caa5020f84b5f65a48470519f78ba"
+  integrity sha512-bnlTVTwq03Na7DpWxFJ1dvnORob+Otb8xHyUqUWhqvz/Ksg8+JXPlR52oeMSZ37YEOa5PyccbgUNutiQdi13TA==
   dependencies:
     "@types/node" "*"
 
@@ -6593,15 +6579,10 @@
     "@types/node" "*"
     form-data "^3.0.0"
 
-"@types/node@*", "@types/node@>= 8":
-  version "14.0.26"
-  resolved "https://registry.npmjs.org/@types/node/-/node-14.0.26.tgz#22a3b8a46510da8944b67bfc27df02c34a35331c"
-  integrity sha512-W+fpe5s91FBGE0pEa0lnqGLL4USgpLgs4nokw16SrBBco/gQxuua7KnArSEOd5iaMqbbSHV10vUDkJYJJqpXKA==
-
-"@types/node@>=12.12.47":
-  version "14.14.31"
-  resolved "https://registry.npmjs.org/@types/node/-/node-14.14.31.tgz#72286bd33d137aa0d152d47ec7c1762563d34055"
-  integrity sha512-vFHy/ezP5qI0rFgJ7aQnjDXwAMrG0KqqIH7tQG5PPv3BWBayOPIQNBjVc/P6hhdZfMx51REc6tfDNXHUio893g==
+"@types/node@*", "@types/node@>= 8", "@types/node@>=12.12.47", "@types/node@^14.14.32":
+  version "14.14.32"
+  resolved "https://registry.npmjs.org/@types/node/-/node-14.14.32.tgz#90c5c4a8d72bbbfe53033f122341343249183448"
+  integrity sha512-/Ctrftx/zp4m8JOujM5ZhwzlWLx22nbQJiVqz8/zE15gOeEW+uly3FSX4fGFpcfEvFzXcMCJwq9lGVWgyARXhg==
 
 "@types/node@^10.1.0", "@types/node@^10.12.0":
   version "10.17.35"
@@ -6618,11 +6599,6 @@
   resolved "https://registry.npmjs.org/@types/node/-/node-13.13.45.tgz#e6676bcca092bae5751d015f074a234d5a82eb63"
   integrity sha512-703YTEp8AwQeapI0PTXDOj+Bs/mtdV/k9VcTP7z/de+lx6XjFMKdB+JhKnK+6PZ5za7omgZ3V6qm/dNkMj/Zow==
 
-"@types/node@^14.14.32":
-  version "14.14.32"
-  resolved "https://registry.npmjs.org/@types/node/-/node-14.14.32.tgz#90c5c4a8d72bbbfe53033f122341343249183448"
-  integrity sha512-/Ctrftx/zp4m8JOujM5ZhwzlWLx22nbQJiVqz8/zE15gOeEW+uly3FSX4fGFpcfEvFzXcMCJwq9lGVWgyARXhg==
-
 "@types/normalize-package-data@^2.4.0":
   version "2.4.0"
   resolved "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.0.tgz#e486d0d97396d79beedd0a6e33f4534ff6b4973e"