diff --git a/t/CMakeLists.txt b/t/CMakeLists.txt
index e7c1093..f4a19ca 100644
--- a/t/CMakeLists.txt
+++ b/t/CMakeLists.txt
@@ -4,7 +4,6 @@ set(SRC_DIR "../src")
 
 add_executable("t_buf"          "t_buf.c"     "${SRC_DIR}/strlcpy.c" "${SRC_DIR}/buf.c")
 add_executable("t_cmd"          "t_cmd.c"     "${SRC_DIR}/strlcpy.c" "${SRC_DIR}/buf.c" "${SRC_DIR}/commands.c")
-add_executable("t_cmsg"         "t_cmsg.c"    "${SRC_DIR}/strlcpy.c" "${SRC_DIR}/cmsg.c")
 add_executable("t_matches"      "t_matches.c" "${SRC_DIR}/strlcpy.c" "${SRC_DIR}/matches.c")
 add_executable("t_ipaddr"       "t_ipaddr.c"  "${SRC_DIR}/strlcpy.c" "${SRC_DIR}/matches.c" "${SRC_DIR}/ipaddr.c")
 add_executable("t_statefile"    "t_statefile.c"  "${SRC_DIR}/strlcpy.c" "${SRC_DIR}/matches.c" "${SRC_DIR}/ipaddr.c" "${SRC_DIR}/statefile.c" "${SRC_DIR}/log.c")
@@ -13,7 +12,6 @@ add_executable("t_backend_usage" "t_backend_usage.c" "${SRC_DIR}/strlcpy.c")
 
 add_test("tests/f2b_buf_*"     "t_buf")
 add_test("tests/f2b_cmd_*"     "t_cmd")
-add_test("tests/f2b_cmsg_*"    "t_cmsg")
 add_test("tests/f2b_matches_*" "t_matches")
 add_test("tests/f2b_ipaddr_*"  "t_ipaddr")
 add_test("tests/f2b_statefile_*"  "t_statefile")
diff --git a/t/t_cmsg.c b/t/t_cmsg.c
deleted file mode 100644
index fb87aed..0000000
--- a/t/t_cmsg.c
+++ /dev/null
@@ -1,32 +0,0 @@
-#include "../src/common.h"
-#include "../src/cmsg.h"
-
-int main() {
-  const char *argv[DATA_ARGS_MAX];
-  f2b_cmsg_t msg;
-
-  memset(&msg, 0x0, sizeof(msg));
-  memset(argv, 0x0, sizeof(argv));
-
-  snprintf(msg.data, sizeof(msg.data), "test1\ntest2\n");
-  msg.size = strlen(msg.data);
-
-  f2b_cmsg_convert_args(&msg);
-  assert(memcmp(msg.data, "test1\0test2\0", 12) == 0);
-
-  f2b_cmsg_extract_args(&msg, argv);
-  assert(argv[0] == msg.data + 0);
-  assert(argv[1] == msg.data + 6);
-  assert(memcmp(argv[0], "test1\0", 6) == 0);
-  assert(memcmp(argv[1], "test2\0", 6) == 0);
-
-  /* data not null-terminated */
-  msg.size = 10;
-  memcpy(msg.data, "test1\0test2\n", 10);
-  assert(f2b_cmsg_extract_args(&msg, argv) == -1);
-
-  msg.size = 0;
-  assert(f2b_cmsg_extract_args(&msg, argv) == 0);
-
-  return EXIT_SUCCESS;
-}