diff --git a/core-writer/test/test_H5WriteModule.cpp b/core-writer/test/test_H5WriteModule.cpp
index 575e31d..cbe7ba2 100644
--- a/core-writer/test/test_H5WriteModule.cpp
+++ b/core-writer/test/test_H5WriteModule.cpp
@@ -1,7 +1,6 @@
 #include "gtest/gtest.h"
 #include "H5WriteModule.hpp"
 
-#include <thread>
 #include <string>
 #include "RingBuffer.hpp"
 
@@ -9,14 +8,57 @@
 
 using namespace std;
 
-void generate_frames(RingBuffer& ring_buffer)
+// Shape * 2 bytes/value (uint16_t)
+size_t image_n_bytes = 1024*2*2;
+
+void generate_frames(RingBuffer& ring_buffer, int n_frames)
 {
-    // TODO: FIll the ring_buffer with test data.
+    size_t y_length = 2;
+    size_t x_length = 1024;
+
+    for (int i_frame=0; i_frame < n_frames; i_frame++) {
+
+        FrameMetadata metadata = {
+                0, // size_t buffer_slot_index;
+                0, // size_t frame_bytes_size;
+                static_cast<uint64_t>(i_frame), // uint64_t frame_index;
+                "little", // std::string endianness;
+                "uint16", //std::string type;
+                {y_length, x_length} // std::vector<size_t> frame_shape;
+        };
+
+        auto ptr_metadata = make_shared<FrameMetadata>(metadata);
+        auto ptr_buffer = ring_buffer.reserve(ptr_metadata);
+
+        for (size_t y=0; y<y_length; y++) {
+            for (size_t x=0; x<x_length; x++) {
+                // Buffer offset y*x* 2 (uint16)
+                char* value_ptr = ptr_buffer + y*x*2;
+                *value_ptr = static_cast<uint16_t>(i_frame);
+            }
+        }
+
+        ring_buffer.commit(ptr_metadata);
+    }
 }
 
 TEST(H5WriteModule, basic_interaction)
 {
     TestH5Format format("start_dataset");
+
     RingBuffer ring_buffer(10);
+    ring_buffer.initialize(image_n_bytes);
+
     H5WriteModule h5_write_module(ring_buffer, {}, format);
+
+    h5_write_module.start_writing("ignore_out.h5", 5);
+    generate_frames(ring_buffer, 5);
+
+    this_thread::sleep_for(chrono::milliseconds(100));
+
+    // Stop should never throw an exception.
+    h5_write_module.stop_writing();
+    EXPECT_NO_THROW(h5_write_module.stop_writing());
+
+    EXPECT_TRUE(ring_buffer.is_empty());
 }
\ No newline at end of file