diff --git a/mockfs/mockfs.go b/mockfs/mockfs.go
index 8b7a3df..7f2caa4 100644
--- a/mockfs/mockfs.go
+++ b/mockfs/mockfs.go
@@ -340,6 +340,8 @@ func (m *MockFS) DumpDB(suffix ...string) {
 	if err != nil {
 		m.t.Fatalf("backing up: %v", err)
 	}
+
+	m.t.Error("DumpDB left behind")
 }
 
 type tagReaderResult struct {