1 files changed, 2 insertions, 2 deletions
diff --git a/core/fpdfapi/parser/cpdf_read_validator_unittest.cpp b/core/fpdfapi/parser/cpdf_read_validator_unittest.cpp
index 640269884d..cf8b9b65a1 100644
--- a/core/fpdfapi/parser/cpdf_read_validator_unittest.cpp
+++ b/core/fpdfapi/parser/cpdf_read_validator_unittest.cpp
@@ -20,7 +20,7 @@ std::pair<FX_FILESIZE, FX_FILESIZE> MakeRange(uint32_t start, uint32_t end) {
   return std::pair<FX_FILESIZE, FX_FILESIZE>(start, end);
 }
 
-class MockFileAvail : public CPDF_DataAvail::FileAvail {
+class MockFileAvail final : public CPDF_DataAvail::FileAvail {
  public:
   MockFileAvail() : available_range_(0, 0) {}
   ~MockFileAvail() override {}
@@ -42,7 +42,7 @@ class MockFileAvail : public CPDF_DataAvail::FileAvail {
   std::pair<FX_FILESIZE, FX_FILESIZE> available_range_;
 };
 
-class MockDownloadHints : public CPDF_DataAvail::DownloadHints {
+class MockDownloadHints final : public CPDF_DataAvail::DownloadHints {
  public:
   MockDownloadHints() : last_requested_range_(0, 0) {}
   ~MockDownloadHints() override {}