diff --git a/test/dwarfs_benchmark.cpp b/test/dwarfs_benchmark.cpp
index c8612b5c..2c1f2a53 100644
--- a/test/dwarfs_benchmark.cpp
+++ b/test/dwarfs_benchmark.cpp
@@ -213,7 +213,7 @@ class filesystem : public ::benchmark::Fixture {
  public:
   static constexpr size_t NUM_ENTRIES = 8;
 
-  void SetUp(::benchmark::State const& state) {
+  void SetUp(::benchmark::State const& state) override {
     image = make_filesystem(&state);
     mm = std::make_shared<test::mmap_mock>(image);
     reader::filesystem_options opts;
@@ -228,7 +228,7 @@ class filesystem : public ::benchmark::Fixture {
     }
   }
 
-  void TearDown(::benchmark::State const&) {
+  void TearDown(::benchmark::State const&) override {
     inode_views.clear();
     image.clear();
     mm.reset();
@@ -319,7 +319,7 @@ class filesystem : public ::benchmark::Fixture {
 
 class filesystem_walk : public ::benchmark::Fixture {
  public:
-  void SetUp(::benchmark::State const&) {
+  void SetUp(::benchmark::State const&) override {
     mm = std::make_shared<test::mmap_mock>(get_image());
     reader::filesystem_options opts;
     opts.block_cache.max_bytes = 1 << 20;
@@ -328,7 +328,7 @@ class filesystem_walk : public ::benchmark::Fixture {
     // fs->dump(std::cout, {.features = reader::fsinfo_features::for_level(2)});
   }
 
-  void TearDown(::benchmark::State const&) {
+  void TearDown(::benchmark::State const&) override {
     mm.reset();
     fs.reset();
   }
diff --git a/test/test_helpers.h b/test/test_helpers.h
index a1aefef5..9452e05d 100644
--- a/test/test_helpers.h
+++ b/test/test_helpers.h
@@ -221,7 +221,8 @@ class mock_filter : public writer::entry_filter {
   mock_filter(std::shared_ptr<filter_transformer_data> data)
       : data_{std::move(data)} {}
 
-  writer::filter_action filter(writer::entry_interface const& ei) const {
+  writer::filter_action
+  filter(writer::entry_interface const& ei) const override {
     data_->filter_calls.emplace_back(ei);
     return writer::filter_action::keep;
   }
@@ -235,7 +236,7 @@ class mock_transformer : public writer::entry_transformer {
   mock_transformer(std::shared_ptr<filter_transformer_data> data)
       : data_{std::move(data)} {}
 
-  void transform(writer::entry_interface& ei) {
+  void transform(writer::entry_interface& ei) override {
     data_->transform_calls.emplace_back(ei);
   }