diff --git a/app/soapbox/__mocks__/api.ts b/app/soapbox/__mocks__/api.ts
index c164ba63c..060846c94 100644
--- a/app/soapbox/__mocks__/api.ts
+++ b/app/soapbox/__mocks__/api.ts
@@ -7,7 +7,7 @@ import type { AxiosInstance, AxiosResponse } from 'axios';
 const api = jest.requireActual('../api') as Record<string, Function>;
 let mocks: Array<Function> = [];
 
-export const __stub = (func: Function) => mocks.push(func);
+export const __stub = (func: (mock: MockAdapter) => void) => mocks.push(func);
 export const __clear = (): Function[] => mocks = [];
 
 const setupMock = (axios: AxiosInstance) => {
diff --git a/app/soapbox/api.ts b/app/soapbox/api.ts
index 33cd803ad..bdcaf53d8 100644
--- a/app/soapbox/api.ts
+++ b/app/soapbox/api.ts
@@ -13,6 +13,8 @@ import * as BuildConfig from 'soapbox/build_config';
 import { RootState } from 'soapbox/store';
 import { getAccessToken, getAppToken, isURL, parseBaseURL } from 'soapbox/utils/auth';
 
+import type MockAdapter from 'axios-mock-adapter';
+
 /**
  Parse Link headers, mostly for pagination.
  @see {@link https://www.npmjs.com/package/http-link-header}
@@ -90,3 +92,7 @@ export default (getState: () => RootState, authType: string = 'user'): AxiosInst
 
   return baseClient(accessToken, baseURL);
 };
+
+// The Jest mock exports these, so they're needed for TypeScript.
+export const __stub = (_func: (mock: MockAdapter) => void) => 0;
+export const __clear = (): Function[] => [];
diff --git a/dangerfile.ts b/dangerfile.ts
index cf842bb8d..4a25f80f7 100644
--- a/dangerfile.ts
+++ b/dangerfile.ts
@@ -2,7 +2,7 @@ import { danger, warn, message } from 'danger';
 
 const docs = danger.git.fileMatch('docs/**/*.md');
 const app = danger.git.fileMatch('app/**/*.(js|ts|tsx)');
-const tests = danger.git.fileMatch('*/__tests__/*');
+const tests = danger.git.fileMatch('**/__tests__/**');
 
 if (docs.edited) {
   message('Thanks - We :heart: our [documentarians](http://www.writethedocs.org/)!');
diff --git a/package.json b/package.json
index 6c3c7cb3b..02440ebe1 100644
--- a/package.json
+++ b/package.json
@@ -92,7 +92,7 @@
     "array-includes": "^3.0.3",
     "autoprefixer": "^10.4.2",
     "axios": "^0.27.2",
-    "axios-mock-adapter": "^1.18.1",
+    "axios-mock-adapter": "^1.21.1",
     "babel-loader": "^8.2.5",
     "babel-plugin-lodash": "^3.3.4",
     "babel-plugin-preval": "^5.1.0",
diff --git a/yarn.lock b/yarn.lock
index c7801ae82..33caf4583 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3435,13 +3435,12 @@ axe-core@^4.0.2:
   resolved "https://registry.yarnpkg.com/axe-core/-/axe-core-4.3.3.tgz#b55cd8e8ddf659fe89b064680e1c6a4dceab0325"
   integrity sha512-/lqqLAmuIPi79WYfRpy2i8z+x+vxU3zX2uAm0gs1q52qTuKwolOj1P8XbufpXcsydrpKx2yGn2wzAnxCMV86QA==
 
-axios-mock-adapter@^1.18.1:
-  version "1.20.0"
-  resolved "https://registry.yarnpkg.com/axios-mock-adapter/-/axios-mock-adapter-1.20.0.tgz#21f5b4b625306f43e8c05673616719da86e20dcb"
-  integrity sha512-shZRhTjLP0WWdcvHKf3rH3iW9deb3UdKbdnKUoHmmsnBhVXN3sjPJM6ZvQ2r/ywgvBVQrMnjrSyQab60G1sr2w==
+axios-mock-adapter@^1.21.1:
+  version "1.21.1"
+  resolved "https://registry.yarnpkg.com/axios-mock-adapter/-/axios-mock-adapter-1.21.1.tgz#efe7e46ad1b0d2acd72188afa91c5720660777b3"
+  integrity sha512-Pdm7nZuhkz/DSucQ4Bbo9qVBqfm9j7ev9ycTvIXHqvAjnJEjWPHKYfTfpounVp8MwjFFSHXGS7hCkTwAswtSTA==
   dependencies:
     fast-deep-equal "^3.1.3"
-    is-blob "^2.1.0"
     is-buffer "^2.0.5"
 
 axios@^0.27.2:
@@ -6583,11 +6582,6 @@ is-binary-path@~2.1.0:
   dependencies:
     binary-extensions "^2.0.0"
 
-is-blob@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/is-blob/-/is-blob-2.1.0.tgz#e36cd82c90653f1e1b930f11baf9c64216a05385"
-  integrity sha512-SZ/fTft5eUhQM6oF/ZaASFDEdbFVe89Imltn9uZr03wdKMcWNVYSMjQPFtg05QuNkt5l5c135ElvXEQG0rk4tw==
-
 is-boolean-object@^1.1.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/is-boolean-object/-/is-boolean-object-1.1.2.tgz#5c6dc200246dd9321ae4b885a114bb1f75f63719"