diff --git a/alfa-client/libs/tech-shared/src/lib/validation/tech.validation.util.spec.ts b/alfa-client/libs/tech-shared/src/lib/validation/tech.validation.util.spec.ts
index a777fd637e6994f35d9b13f2a85b113f0074c787..658c577bd6ab2d7213a6288657c47e0a0aeef500 100644
--- a/alfa-client/libs/tech-shared/src/lib/validation/tech.validation.util.spec.ts
+++ b/alfa-client/libs/tech-shared/src/lib/validation/tech.validation.util.spec.ts
@@ -203,7 +203,7 @@ describe('ValidationUtils', () => {
     describe.each([
       ['', '', 'unknown-field'],
       ['valid-prefix', 'valid-prefix', 'unknown-field'],
-      ['valid-prefix', 'valid-prefix', 'unknown-field'],
+      ['valid-prefix', 'valid-prefix', 'subGroup.unknown-field'],
       ['unknown-prefix', 'valid-prefix', 'unknown-field'],
       ['unknown-prefix', 'valid-prefix', 'baseField1'],
     ])(