diff --git a/tests/c/testsuite/sock_shutdown-invalid_fd.c b/tests/c/testsuite/sock_shutdown-invalid_fd.c
new file mode 100644
index 00000000..8680f86f
--- /dev/null
+++ b/tests/c/testsuite/sock_shutdown-invalid_fd.c
@@ -0,0 +1,13 @@
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+
+int main() {
+  int fd = 3;
+  assert(shutdown(fd, SHUT_RD) != 0);
+  assert(errno == EBADF);
+
+  return EXIT_SUCCESS;
+}
diff --git a/tests/c/testsuite/sock_shutdown-not_sock.c b/tests/c/testsuite/sock_shutdown-not_sock.c
new file mode 100644
index 00000000..e3a3e873
--- /dev/null
+++ b/tests/c/testsuite/sock_shutdown-not_sock.c
@@ -0,0 +1,12 @@
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+int main() {
+  assert(shutdown(STDOUT_FILENO, SHUT_RD) != 0);
+  assert(errno == ENOTSOCK);
+
+  return EXIT_SUCCESS;
+}