diff --git a/src/test/librados_test_stub/TestIoCtxImpl.h b/src/test/librados_test_stub/TestIoCtxImpl.h
index 3568cd3206d74..7712e77307078 100644
--- a/src/test/librados_test_stub/TestIoCtxImpl.h
+++ b/src/test/librados_test_stub/TestIoCtxImpl.h
@@ -185,9 +185,9 @@ class TestIoCtxImpl {
   };
 
   TestRadosClient *m_client;
-  int64_t m_pool_id;
+  int64_t m_pool_id = 0;
   std::string m_pool_name;
-  snap_t m_snap_seq;
+  snap_t m_snap_seq = 0;
   SnapContext m_snapc;
   std::atomic<uint64_t> m_refcount = { 0 };
   std::atomic<uint64_t> m_pending_ops = { 0 };
diff --git a/src/test/librbd/io/test_mock_ImageRequestWQ.cc b/src/test/librbd/io/test_mock_ImageRequestWQ.cc
index 66589e5088dc0..5222c0eb6c687 100644
--- a/src/test/librbd/io/test_mock_ImageRequestWQ.cc
+++ b/src/test/librbd/io/test_mock_ImageRequestWQ.cc
@@ -23,7 +23,7 @@ namespace io {
 template <>
 struct ImageRequest<librbd::MockTestImageCtx> {
   static ImageRequest* s_instance;
-  AioCompletion *aio_comp;
+  AioCompletion *aio_comp = nullptr;
 
   static ImageRequest* create_write_request(librbd::MockTestImageCtx &image_ctx,
                                             AioCompletion *aio_comp,
diff --git a/src/tools/rbd_mirror/image_sync/ObjectCopyRequest.h b/src/tools/rbd_mirror/image_sync/ObjectCopyRequest.h
index 8430e7030c439..57963c22ca330 100644
--- a/src/tools/rbd_mirror/image_sync/ObjectCopyRequest.h
+++ b/src/tools/rbd_mirror/image_sync/ObjectCopyRequest.h
@@ -116,7 +116,7 @@ class ObjectCopyRequest {
   std::string m_remote_oid;
 
   librados::snap_set_t m_snap_set;
-  int m_snap_ret;
+  int m_snap_ret = 0;
 
   bool m_retry_missing_read = false;
   librados::snap_set_t m_retry_snap_set;