diff --git a/core-buffer/test/test_FastH5Writer.cpp b/core-buffer/test/test_FastH5Writer.cpp
index 067ed4d..e8c2c75 100644
--- a/core-buffer/test/test_FastH5Writer.cpp
+++ b/core-buffer/test/test_FastH5Writer.cpp
@@ -5,13 +5,14 @@ TEST(FastH5Writer, basic_interaction)
 {
     auto root_folder = ".";
     auto device_name = "fast_device";
+    size_t pulse_id = 1;
 
-    auto buffer = make_shared<char[]>(512*1024*2);
+    auto buffer = make_unique<char[]>(512*1024*2);
 
     UdpFrameMetadata metadata;
     metadata.pulse_id = 1;
     metadata.frame_index = 2;
-    metadata.daq_rec = 2;
+    metadata.daq_rec = 3;
     metadata.n_recv_packets = 128;
 
     FastH5Writer writer(
@@ -22,7 +23,7 @@ TEST(FastH5Writer, basic_interaction)
     writer.add_scalar_metadata<uint32_t>("daq_rec");
     writer.add_scalar_metadata<uint16_t>("received_packets");
 
-    writer.set_pulse_id(1);
+    writer.set_pulse_id(pulse_id);
 
     writer.write_data(buffer.get());
 
@@ -46,5 +47,42 @@ TEST(FastH5Writer, basic_interaction)
         &(metadata.n_recv_packets),
         sizeof(uint16_t));
 
+    writer.close_file();
 
+    auto filename = BufferUtils::get_filename(
+            root_folder, device_name, pulse_id);
+
+    auto file_frame_index = BufferUtils::get_file_frame_index(pulse_id);
+
+    H5::H5File input_file(filename, H5F_ACC_RDONLY);
+
+    auto image_dataset = input_file.openDataSet("image");
+    auto image_buffer = make_unique<uint16_t[]>(1000*512*1024);
+    image_dataset.read(
+            image_buffer.get(), H5::PredType::NATIVE_UINT16);
+
+    auto pulse_id_dataset = input_file.openDataSet("pulse_id");
+    auto pulse_id_buffer = make_unique<uint64_t[]>(1000);
+    pulse_id_dataset.read(
+            pulse_id_buffer.get(), H5::PredType::NATIVE_UINT64);
+    EXPECT_EQ(pulse_id_buffer[file_frame_index], 1);
+
+    auto frame_id_dataset = input_file.openDataSet("frame_id");
+    auto frame_id_buffer = make_unique<uint64_t[]>(1000);
+    frame_id_dataset.read(
+            frame_id_buffer.get(), H5::PredType::NATIVE_UINT64);
+    EXPECT_EQ(frame_id_buffer[file_frame_index], 2);
+
+    auto daq_rec_dataset = input_file.openDataSet("daq_rec");
+    auto daq_rec_buffer = make_unique<uint32_t[]>(1000);
+    daq_rec_dataset.read(
+            daq_rec_buffer.get(), H5::PredType::NATIVE_UINT32);
+    EXPECT_EQ(daq_rec_buffer[file_frame_index], 3);
+
+    auto received_packets_dataset =
+            input_file.openDataSet("received_packets");
+    auto received_packets_buffer = make_unique<uint16_t[]>(1000);
+    received_packets_dataset.read(
+            received_packets_buffer.get(), H5::PredType::NATIVE_UINT16);
+    EXPECT_EQ(received_packets_buffer[file_frame_index], 128);
 }