diff --git a/cmd/restic/lock_test.go b/cmd/restic/lock_test.go
index cb386312c..1ad55bb4b 100644
--- a/cmd/restic/lock_test.go
+++ b/cmd/restic/lock_test.go
@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"fmt"
+	"runtime"
 	"strings"
 	"testing"
 	"time"
@@ -138,7 +139,9 @@ type loggingBackend struct {
 
 func (b *loggingBackend) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) error {
 	b.t.Logf("save %v @ %v", h, time.Now())
-	return b.Backend.Save(ctx, h, rd)
+	err := b.Backend.Save(ctx, h, rd)
+	b.t.Logf("save finished %v @ %v", h, time.Now())
+	return err
 }
 
 func TestLockSuccessfulRefresh(t *testing.T) {
@@ -163,7 +166,15 @@ func TestLockSuccessfulRefresh(t *testing.T) {
 
 	select {
 	case <-wrappedCtx.Done():
-		t.Fatal("lock refresh failed")
+		// don't call t.Fatal to allow the lock to be properly cleaned up
+		t.Error("lock refresh failed", time.Now())
+
+		// Dump full stacktrace
+		buf := make([]byte, 1024*1024)
+		n := runtime.Stack(buf, true)
+		buf = buf[:n]
+		t.Log(string(buf))
+
 	case <-time.After(2 * refreshabilityTimeout):
 		// expected lock refresh to work
 	}