diff --git a/internal/uploads/worker_test.go b/internal/uploads/worker_test.go
index da5235f..2454795 100644
--- a/internal/uploads/worker_test.go
+++ b/internal/uploads/worker_test.go
@@ -23,6 +23,8 @@ type wStore struct {
 	completed map[string]domain.Transcription
 	failed    map[string]domain.UploadErrorKind
 	startErr  error
+	saves     [][]domain.ProgressStep
+	beats     int
 }
 
 func newWStore() *wStore {
@@ -50,6 +52,35 @@ func (s *wStore) FailUpload(_ context.Context, _, id string, k domain.UploadErro
 	return nil
 }
 
+func (s *wStore) SaveProgress(_ context.Context, _, _ string, steps []domain.ProgressStep, _ time.Time) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.saves = append(s.saves, append([]domain.ProgressStep(nil), steps...))
+	return nil
+}
+
+func (s *wStore) Heartbeat(context.Context, string, string) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.beats++
+	return nil
+}
+
+func (s *wStore) lastSteps() []domain.ProgressStep {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if len(s.saves) == 0 {
+		return nil
+	}
+	return s.saves[len(s.saves)-1]
+}
+
+func (s *wStore) beatCount() int {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.beats
+}
+
 func (s *wStore) snapshot() (map[string]domain.Transcription, map[string]domain.UploadErrorKind) {
 	s.mu.Lock()
 	defer s.mu.Unlock()