diff --git a/.changeset/breezy-ways-try.md b/.changeset/breezy-ways-try.md
index d8c22ed8ed..15e831a673 100644
--- a/.changeset/breezy-ways-try.md
+++ b/.changeset/breezy-ways-try.md
@@ -23,3 +23,21 @@ In order to switch back to `ts-jest`, install `ts-jest@^26.4.3` as a dependency
 ```
 
 Note that this will override the default jest transforms included with the `@backstage/cli`.
+
+It is possible that some test code needs a small migration as a result of this change, which stems from a difference in how `sucrase` and `ts-jest` transform module re-exports.
+
+Consider the following code:
+
+```ts
+import * as utils from './utils';
+
+jest.spyOn(utils, 'myUtility').mockReturnValue(3);
+```
+
+If the `./utils` import for example refers to an index file that in turn re-exports from `./utils/myUtility`, you would have to change the code to the following to work around the fact that the exported object from `./utils` ends up not having configurable properties, thus breaking `jest.spyOn`.
+
+```ts
+import * as utils from './utils/myUtility';
+
+jest.spyOn(utils, 'myUtility').mockReturnValue(3);
+```