diff --git a/src/explore-education-statistics-admin/jest.config.js b/src/explore-education-statistics-admin/jest.config.js
index 2c99fd25194..ad567d6064c 100644
--- a/src/explore-education-statistics-admin/jest.config.js
+++ b/src/explore-education-statistics-admin/jest.config.js
@@ -32,6 +32,7 @@ const config = {
       '<rootDir>/../explore-education-statistics-common/test/$1',
     '^axios$': '<rootDir>/node_modules/axios/dist/axios.js',
     '^marked$': '<rootDir>/node_modules/marked/lib/marked.umd.js',
+    '^explore-education-statistics-ckeditor$': '<rootDir>/test/EditorStub.js',
   },
   moduleFileExtensions: [
     'web.js',
diff --git a/src/explore-education-statistics-admin/test/EditorStub.js b/src/explore-education-statistics-admin/test/EditorStub.js
new file mode 100644
index 00000000000..d4fa2a4702b
--- /dev/null
+++ b/src/explore-education-statistics-admin/test/EditorStub.js
@@ -0,0 +1,3 @@
+// Stub out CKEditor to prevent errors from its
+// CSS build polluting the test output.
+export default class EditorStub {}