diff --git a/cmd/tapir/uploads_test.go b/cmd/tapir/uploads_test.go
index 894aaae..d96aeb2 100644
--- a/cmd/tapir/uploads_test.go
+++ b/cmd/tapir/uploads_test.go
@@ -20,15 +20,17 @@ import (
 // fakeUploadsStore satisfies the store surface buildUploads needs, and counts the
 // start-up sweep.
 type fakeUploadsStore struct {
-	sweeps   int
-	sweepErr error
+	sweeps      int
+	sweepErr    error
+	failedKinds []domain.UploadErrorKind
 }
 
 func (f *fakeUploadsStore) CreateUpload(context.Context, string, string, bool) (string, error) {
 	return "id", nil
 }
 
-func (f *fakeUploadsStore) FailUpload(context.Context, string, string, domain.UploadErrorKind) error {
+func (f *fakeUploadsStore) FailUpload(_ context.Context, _, _ string, k domain.UploadErrorKind) error {
+	f.failedKinds = append(f.failedKinds, k)
 	return nil
 }