diff --git a/src/functional/iconv_open.c b/src/functional/iconv_open.c
new file mode 100644
index 0000000..ade3ae6
--- /dev/null
+++ b/src/functional/iconv_open.c
@@ -0,0 +1,48 @@
+#include <string.h>
+#include <errno.h>
+#include <iconv.h>
+#include "test.h"
+
+int main(void)
+{
+	iconv_t cd;
+	char buf[100];
+	char *inbuf = "test";
+	char *outbuf = buf;
+	size_t inlen = strlen(inbuf);
+	size_t outlen;
+	size_t r;
+
+	cd = iconv_open("", "");
+	if (cd != (iconv_t)-1)
+		t_error("iconv_open(\"\",\"\") didn't fail\n");
+	if (errno != EINVAL)
+		t_error("iconv_open(\"\",\"\") did not fail with EINVAL, got %s\n", strerror(errno));
+
+	errno = 0;
+	cd = iconv_open("UTF-8", "UTF-8");
+	if (cd == (iconv_t)-1)
+		t_error("iconv_open(\"\",\"\") failed: %s\n", strerror(errno));
+
+	errno = 0;
+	outlen = 0;
+	r = iconv(cd, &inbuf, &inlen, &outbuf, &outlen);
+	if (r != -1)
+		t_error("iconv() did not fail with 0 output length\n");
+	if (errno != E2BIG)
+		t_error("iconv() did not fail with E2BIG, got %s\n", strerror(errno));
+
+	errno = 0;
+	outlen = sizeof buf;
+	r = iconv(cd, &inbuf, &inlen, &outbuf, &outlen);
+	if (r)
+		t_error("iconv() did not return 0 when converting utf8 to utf8, got %d\n", r);
+	if (errno)
+		t_error("iconv() failed: %s\n", strerror(errno));
+
+	r = iconv_close(cd);
+	if (r == -1)
+		t_error("iconv_close failed: %s\n", strerror(errno));
+
+	return t_status;
+}