diff --git a/.changeset/auth-backend-ten-doors-exist.md b/.changeset/auth-backend-ten-doors-exist.md
index 97a3a421ee..2dafaf728d 100644
--- a/.changeset/auth-backend-ten-doors-exist.md
+++ b/.changeset/auth-backend-ten-doors-exist.md
@@ -3,4 +3,4 @@
 '@backstage/plugin-auth-backend': patch
 ---
 
-bugfix: issue 3223 - detect mismatching origin and indicate it in the message at auth failure
+bug fix: issue 3223 - detect mismatching origin and indicate it in the message at auth failure
diff --git a/plugins/auth-backend/src/lib/flow/authFlowHelpers.test.ts b/plugins/auth-backend/src/lib/flow/authFlowHelpers.test.ts
index 5e4e5f875b..10fb82eb36 100644
--- a/plugins/auth-backend/src/lib/flow/authFlowHelpers.test.ts
+++ b/plugins/auth-backend/src/lib/flow/authFlowHelpers.test.ts
@@ -82,10 +82,10 @@ describe('oauth helpers', () => {
     });
 
     it('should call postMessage twice but only one of them with target *', () => {
-      let responseBody: String;
+      let responseBody = '';
 
       const mockResponse = ({
-        end: jest.fn(function (body) {
+        end: jest.fn(body => {
           responseBody = body;
           return this;
         }),