diff --git a/lib/c/test/test_labcomm.c b/lib/c/test/test_labcomm.c
index a6f92140805a58f2bf22289824e82e8a06538e6d..b14f81440ecba90956701a31a60d270df5b978f4 100644
--- a/lib/c/test/test_labcomm.c
+++ b/lib/c/test/test_labcomm.c
@@ -218,6 +218,7 @@ int main(void)
 #include <labcomm_mem_reader.h>
 #include "test/testdata/gen/test_sample.h"
 
+#define TEST_BUFFER_SIZE (50)
 
 void test_error_handler(enum labcomm_error error_id, size_t nbr_va_args, ...);
 
@@ -351,7 +352,6 @@ void test_decode_unreg_signature_error()
 	labcomm_encoder_free(encoder);
 	free(enc_ctx.buf);
 }
-
 int main()
 {
 	CU_pSuite suite_decoder = NULL;
@@ -385,7 +385,7 @@ int main()
 
 	// Set verbosity.
 	CU_basic_set_mode(CU_BRM_VERBOSE);
-	/* CU_console_run_tests(); */
+	/*CU_console_run_tests();*/
 
 	// Run all test suites.
 	CU_basic_run_tests();
diff --git a/lib/c/test/test_labcomm_copy.c b/lib/c/test/test_labcomm_copy.c
new file mode 100644
index 0000000000000000000000000000000000000000..5968ad455bb1bc58309ddf42b8198b71f2aa7168
--- /dev/null
+++ b/lib/c/test/test_labcomm_copy.c
@@ -0,0 +1,123 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <err.h>
+
+#include "labcomm.h"
+#include "labcomm_private.h"
+#include "labcomm_default_error_handler.h"
+#include "labcomm_default_memory.h"
+#include "labcomm_default_scheduler.h"
+#include "labcomm_fd_writer.h"
+#include "labcomm_fd_reader.h"
+#include "test/gen/generated_encoding.h"
+
+#define DATA_FILE "copy_test.dat"
+
+static void handle_s1(generated_encoding_S1 *v, void *context)
+{
+  labcomm_copy_generated_encoding_S1(labcomm_default_memory, context, v);
+}
+
+static void handle_b(generated_encoding_B *v, void *context)
+{
+  labcomm_copy_generated_encoding_B(labcomm_default_memory, context, v);
+}
+
+static void handle_i(generated_encoding_I *v, void *context)
+{
+  labcomm_copy_generated_encoding_I(labcomm_default_memory, context, v);
+}
+
+static void handle_p(generated_encoding_P *v, void *context)
+{
+  labcomm_copy_generated_encoding_P(labcomm_default_memory, context, v);
+}
+
+int main(int argc, char **argv)
+{
+  struct labcomm_encoder *encoder;
+  struct labcomm_decoder *decoder;
+  int fd;
+  generated_encoding_S1 s1;
+  generated_encoding_S1 cache_s1;
+  generated_encoding_B b;
+  generated_encoding_B cache_b;
+  generated_encoding_I I;
+  generated_encoding_I cache_I;
+  generated_encoding_P p;
+  generated_encoding_P cache_p;
+
+  fd = open(DATA_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644);
+  if (fd == -1)
+    err(1, "open()");
+  encoder =
+    labcomm_encoder_new(labcomm_fd_writer_new(labcomm_default_memory, fd, 0),
+			labcomm_default_error_handler,
+			labcomm_default_memory,
+			labcomm_default_scheduler);
+
+  labcomm_encoder_register_generated_encoding_S1(encoder);
+  s1.i = 1;
+  labcomm_encode_generated_encoding_S1(encoder, &s1);
+
+  labcomm_encoder_register_generated_encoding_B(encoder);
+  b = 2;
+  labcomm_encode_generated_encoding_B(encoder, &b);
+
+  labcomm_encoder_register_generated_encoding_I(encoder);
+  I.n_0 = 3;
+  I.a = calloc(I.n_0, sizeof(I.a[0]));
+  I.a[0] = 4;
+  I.a[1] = 5;
+  I.a[2] = 6;
+  labcomm_encode_generated_encoding_I(encoder, &I);
+
+  labcomm_encoder_register_generated_encoding_P(encoder);
+  p.n_0 = 7;
+  p.a = calloc(p.n_0, sizeof(p.a[0]));
+  for (int i = 0; i < p.n_0; i++)
+    p.a[i].i = 8 + i;
+  labcomm_encode_generated_encoding_P(encoder, &p);
+
+  labcomm_encoder_free(encoder);
+  encoder = NULL;
+  lseek(fd, 0, SEEK_SET);
+  decoder =
+    labcomm_decoder_new(labcomm_fd_reader_new(labcomm_default_memory, fd, 0),
+			labcomm_default_error_handler,
+			labcomm_default_memory,
+			labcomm_default_scheduler);
+
+  labcomm_decoder_register_generated_encoding_S1(decoder, handle_s1, &cache_s1);
+  labcomm_decoder_register_generated_encoding_B(decoder, handle_b, &cache_b);
+  labcomm_decoder_register_generated_encoding_I(decoder, handle_i, &cache_I);
+  labcomm_decoder_register_generated_encoding_P(decoder, handle_p, &cache_p);
+  labcomm_decoder_decode_one(decoder); /* S1 */
+  labcomm_decoder_decode_one(decoder);
+  labcomm_decoder_decode_one(decoder); /* B */
+  labcomm_decoder_decode_one(decoder);
+  labcomm_decoder_decode_one(decoder); /* I */
+  labcomm_decoder_decode_one(decoder);
+  labcomm_decoder_decode_one(decoder); /* P */
+  labcomm_decoder_decode_one(decoder);
+
+  assert(cache_s1.i == s1.i);
+  assert(cache_b == b);
+  assert(cache_I.n_0 == I.n_0);
+  assert(cache_I.a[0] == I.a[0]);
+  assert(cache_I.a[1] == I.a[1]);
+  assert(cache_I.a[2] == I.a[2]);
+  free(I.a);
+  for (int i = 0; i < p.n_0; i++)
+    assert(cache_p.a[i].i == p.a[i].i);
+  free(p.a);
+
+  labcomm_decoder_free(decoder);
+  close(fd);
+  unlink(DATA_FILE);
+  /* TODO: Implement labcomm_free_x */
+}