diff --git a/tests/benchmark.c b/tests/benchmark.c
deleted file mode 100644
index 9655357f..00000000
--- a/tests/benchmark.c
+++ /dev/null
@@ -1,49 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-/*
- * This example shows fiber context switch (yield)
- * performance done in one second.
-*/
-
-#include <machinarium.h>
-
-static int csw = 0;
-
-static void
-benchmark_worker(void *arg)
-{
-	machine_t machine = arg;
-	printf("worker started.\n");
-	while (machine_active(machine)) {
-		csw++;
-		machine_sleep(machine, 0);
-	}
-	printf("worker done.\n");
-}
-
-static void
-benchmark_runner(void *arg)
-{
-	machine_t machine = arg;
-	printf("benchmark started.\n");
-	machine_create_fiber(machine, benchmark_worker, machine);
-	machine_sleep(machine, 1000);
-	printf("done.\n");
-	printf("context switches %d in 1 sec.\n", csw);
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, benchmark_runner, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/cert.pem b/tests/cert.pem
deleted file mode 100644
index cd5f24bb..00000000
--- a/tests/cert.pem
+++ /dev/null
@@ -1,49 +0,0 @@
------BEGIN PRIVATE KEY-----
-MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQD0uJYT+C7z4kta
-PqAgdmYNLDB0hQpiTcyk1MdtwG+Hdc8mRS56/Y8ZJCo76NAIceoSAW5ZXI1GFxlV
-P/XRg2DbEGez44CkLFEMrTuPNC+fMeVASRE+n8GERJeFWjw/dsHjoW54xDafM1xn
-KTA8R7O5tue3WGPN6t1r89cRrzoJ3cZ7WDoEkL75wPsYK9t1gwhAXj8zjoJNJUzo
-zix9WutepIuENecsGaTB0TFsNsTaSDn9YcvsmthulfZb8kDeW85tUQL6l5wHLThM
-onvwiQouVEoGqYhKhQcuaXHmfXW7w+n1lZ3SFsU62iO63WFsZkwTfgx68FV+7PMX
-r/I8hOqJAgMBAAECggEAVgWwk5JxBr+sFyveY6ra0pSO79Z4QPfyEJrPA3Bag/ZQ
-e7Zj0U3iCEdjJS4AOoe4bN3d6UGUU2f5OrNB+ITC/h41JdG5vXvqfZdDUWJZvw7t
-8/v7ONU1VAY8cN64QOLA4wAy8fae8LVALO8Yiof10DlQGG3Un2SIstLC7e93alG/
-5K/Xv6fQtgCRUL1Ntcpe93qYdR+uICL0pDCxoSchXVwBdccGzlVBeNhE3Ed6/sUb
-G0Vt08mgtwBYNcjPHYU02MmTnrbnPCCc/iPFX9Q6shdV/bbo9fIS6kEF1xdtLJJX
-gyFy6pt/ER4QemAKiRphfYNeLNheC4nrqPh39FiqgQKBgQD6ciSFTazUvkbv+7pu
-QOSqLljQ5dQLTxA+HDGsAgZOyRut1Z90DfTwii9esIZiQ0PGMpY1ECzQ/wJYPVWe
-P0qhbXXWiygJx2VLjolUijBIX38vsS+zAn9QSjVYhnLT+BBsj+Xo2RBMJlNbnoFn
-WI9RazmsSZFlfIYg8XvlIYSGsQKBgQD6JfEl4RE6WEQqi4z4OPwmJ1cH9cg1Ub9w
-Ie4JZrsCFK4vFXk0wATySntdqtmFUFn8rv8vDmXd6Y77OvLb0zyqj2/SXWIaekd2
-V0xxmlA9L+Z4i6xG0egUKqWOqry4AwafN/VnhIFqMZLBIJCvSdNT3r4PzV+//jlE
-sAUUSUdHWQKBgELOc+ODRtkxMKcPlTmX4edrmZGP3TJvErwetTlXCOu3RcTnOTOy
-DWak1eICYLaRjuCt2depyuqtO6jiI5ak93l8Q3TJhhKlt+WhzgxZGGwV3U2RjFHK
-FsAKK5TDuJnGkEsFT6T/UhOeHZpQ+9/fhcuIOMg2j6xsvTLId+41NK7hAoGAC17c
-Jk+ju9Y1SwXK46GbfJR/NUJr1lif7hXsvwqnZ4HPJR7Bwq8TynuuPeS9PH0Zig3e
-VaI+6SZrtGnKjkl80XfxqktKYU+7ndp8BBHyocVioYofy5xRA1Go8uI579dbXrNp
-eUoho9UbCaJUUVN2wrI2S3uXZZ/FtKSXpoNqNQkCgYAyihi5Y8KZ/tAA7b6dftSZ
-J4G3RNaF/CNE0hZ0O8VU5+1BThKmwO/vG1KmpdsmRnxQKXykjPp+8/fIKD7ZOoqm
-+gRnyTsAdifdZiUHwaZfHn4NKdcaKBGy2NpvSwBB6VZQmeeNXQqCeT4axb9KTIgm
-JX/UlUk3+ugvEx2RvM2/HQ==
------END PRIVATE KEY-----
------BEGIN CERTIFICATE-----
-MIIDezCCAmOgAwIBAgIJAIKv7zWJzYwrMA0GCSqGSIb3DQEBCwUAMFQxCzAJBgNV
-BAYTAlJVMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBX
-aWRnaXRzIFB0eSBMdGQxDTALBgNVBAMMBFRFU1QwHhcNMTcwMzMxMTMyODI2WhcN
-MTgwMzMxMTMyODI2WjBUMQswCQYDVQQGEwJSVTETMBEGA1UECAwKU29tZS1TdGF0
-ZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMQ0wCwYDVQQDDARU
-RVNUMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA9LiWE/gu8+JLWj6g
-IHZmDSwwdIUKYk3MpNTHbcBvh3XPJkUuev2PGSQqO+jQCHHqEgFuWVyNRhcZVT/1
-0YNg2xBns+OApCxRDK07jzQvnzHlQEkRPp/BhESXhVo8P3bB46FueMQ2nzNcZykw
-PEezubbnt1hjzerda/PXEa86Cd3Ge1g6BJC++cD7GCvbdYMIQF4/M46CTSVM6M4s
-fVrrXqSLhDXnLBmkwdExbDbE2kg5/WHL7JrYbpX2W/JA3lvObVEC+pecBy04TKJ7
-8IkKLlRKBqmISoUHLmlx5n11u8Pp9ZWd0hbFOtojut1hbGZME34MevBVfuzzF6/y
-PITqiQIDAQABo1AwTjAdBgNVHQ4EFgQUKND1tPpmYEpGFmXiDKNikwU8eAwwHwYD
-VR0jBBgwFoAUKND1tPpmYEpGFmXiDKNikwU8eAwwDAYDVR0TBAUwAwEB/zANBgkq
-hkiG9w0BAQsFAAOCAQEA5dUS0HUeJGTeM4TCQRd5Yp266bIrdk2Ez9tOINQ9+c/S
-R+++4Jc4laQrH3y4o3CaJQ5ktZJFXQfEXyhohaZHXgnofbjkOaFUhTuInaLF5tSU
-k6UebaU+TvAuPTl2zf35HRJ3U6vI08tl2fj+I3IAlRKU+JgzCrXfG9HKYKBBKbmh
-tssvz0xwGR0xqi4OijIv5snoGa7WixlhmW0QwKbKBlGDAq0ngd/ZlpMoY217UCvH
-YKYJ5AVXKI4iYSSZDN9oSf/MEh1SEqHM8of5kcNBW6M320Bun3Z5Edq1BCT1tjD4
-rX+iYSFul04DrAD+RW6V+e+NGSJ7SHy0Ceg7D5w/bw==
------END CERTIFICATE-----
diff --git a/tests/echo.c b/tests/echo.c
deleted file mode 100644
index c94369f8..00000000
--- a/tests/echo.c
+++ /dev/null
@@ -1,89 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-/*
- * This example shows basic tcp server.
- * Read 10 bytes with 5 sec timeout then write back.
- *
- * echo 0123456789 | nc -v 127.0.0.1 7778 # to test
-*/
-
-#include <machinarium.h>
-#include <uv.h>
-
-static void
-test_client(void *arg)
-{
-	machine_io_t client = arg;
-	int fd = machine_fd(client);
-	printf("new connection: %d \n", fd);
-	for (;;) {
-		int rc;
-		/* read 10 bytes (with 5 sec timeout) */
-		rc = machine_read(client, NULL, 10, 5 * 1000);
-		if (rc < 0) {
-			if (machine_read_timedout(client)) {
-				printf("timeout in %d\n", fd);
-				continue;
-			}
-			if (! machine_connected(client)) {
-				printf("client disconnected\n");
-				break;
-			}
-			printf("client read error\n");
-		}
-		/* write 10 bytes */
-		char *buf = machine_read_buf(client);
-		rc = machine_write(client, buf, 10, INT_MAX);
-		if (rc < 0)
-			printf("client write error\n");
-	}
-	printf("client %d disconnected\n", fd);
-	machine_close(client);
-}
-
-static void
-test_server(void *arg)
-{
-	machine_t machine = arg;
-	machine_io_t server = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	uv_ip4_addr("127.0.0.1", 7778, &sa);
-	int rc;
-	rc = machine_bind(server, (struct sockaddr*)&sa);
-	if (rc < 0) {
-		printf("bind failed\n");
-		machine_close(server);
-		return;
-	}
-
-	printf("waiting for connections (127.0.0.1:7778)\n");
-	for (;;) {
-		machine_io_t client;
-		rc = machine_accept(server, 16, &client);
-		if (rc < 0) {
-			printf("accept error.\n");
-		} else
-		if (rc == 0) {
-			machine_create_fiber(machine, test_client, client);
-		}
-	}
-
-	/* unreach */
-	machine_close(server);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_server, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/makefile b/tests/makefile
deleted file mode 100644
index 06ea2757..00000000
--- a/tests/makefile
+++ /dev/null
@@ -1,105 +0,0 @@
-CC         = gcc
-RM         = rm
-CFLAGS     = -I. -Wall -g -O0 -I../src
-LFLAGS_LIB = ../src/libmachinarium.a -pthread -lssl -lcrypto
-LFLAGS     = $(LFLAGS_LIB)
-TESTS      = test_new \
-             test_create \
-             test_sleep \
-             test_wait \
-             test_condition \
-             test_condition_2 \
-             benchmark \
-             test_io_new \
-             test_connect \
-             test_connect_timeout \
-             test_cancel_connect \
-             test_cancel_connect_2 \
-             test_write \
-             test_read \
-             test_read_timeout \
-             test_accept_timeout \
-             test_cancel_accept \
-             test_client_server \
-             test_client_server_ra
-
-#            test_getaddrinfo \
-             test_getaddrinfo_2 \
-             test_getaddrinfo_3 \
-             test_cancel_sleep \
-             test_cancel_sleep_2 \
-             test_cancel_getaddrinfo \
-             test_cancel_getaddrinfo_2 \
-             test_cancel_read \
-             test_tls_connect \
-             echo
-all: validate clean $(TESTS)
-test_new:
-	$(CC) $(CFLAGS) test_new.c $(LFLAGS) -o test_new
-test_create:
-	$(CC) $(CFLAGS) test_create.c $(LFLAGS) -o test_create
-test_sleep:
-	$(CC) $(CFLAGS) test_sleep.c $(LFLAGS) -o test_sleep
-test_sleep_2:
-	$(CC) $(CFLAGS) test_sleep_2.c $(LFLAGS) -o test_sleep_2
-test_wait:
-	$(CC) $(CFLAGS) test_wait.c $(LFLAGS) -o test_wait
-test_condition:
-	$(CC) $(CFLAGS) test_condition.c $(LFLAGS) -o test_condition
-test_condition_2:
-	$(CC) $(CFLAGS) test_condition_2.c $(LFLAGS) -o test_condition_2
-test_io_new:
-	$(CC) $(CFLAGS) test_io_new.c $(LFLAGS) -o test_io_new
-test_getaddrinfo:
-	$(CC) $(CFLAGS) test_getaddrinfo.c $(LFLAGS) -o test_getaddrinfo
-test_getaddrinfo_2:
-	$(CC) $(CFLAGS) test_getaddrinfo_2.c $(LFLAGS) -o test_getaddrinfo_2
-test_getaddrinfo_3:
-	$(CC) $(CFLAGS) test_getaddrinfo_3.c $(LFLAGS) -o test_getaddrinfo_3
-test_connect:
-	$(CC) $(CFLAGS) test_connect.c $(LFLAGS) -o test_connect
-test_write:
-	$(CC) $(CFLAGS) test_write.c $(LFLAGS) -o test_write
-test_read:
-	$(CC) $(CFLAGS) test_read.c $(LFLAGS) -o test_read
-test_read_timeout:
-	$(CC) $(CFLAGS) test_read_timeout.c $(LFLAGS) -o test_read_timeout
-test_accept_timeout:
-	$(CC) $(CFLAGS) test_accept_timeout.c $(LFLAGS) -o test_accept_timeout
-test_connect_timeout:
-	$(CC) $(CFLAGS) test_connect_timeout.c $(LFLAGS) -o test_connect_timeout
-test_client_server:
-	$(CC) $(CFLAGS) test_client_server.c $(LFLAGS) -o test_client_server
-test_client_server_ra:
-	$(CC) $(CFLAGS) test_client_server_ra.c $(LFLAGS) -o test_client_server_ra
-test_cancel_sleep:
-	$(CC) $(CFLAGS) test_cancel_sleep.c $(LFLAGS) -o test_cancel_sleep
-test_cancel_sleep_2:
-	$(CC) $(CFLAGS) test_cancel_sleep_2.c $(LFLAGS) -o test_cancel_sleep_2
-test_cancel_getaddrinfo:
-	$(CC) $(CFLAGS) test_cancel_getaddrinfo.c $(LFLAGS) -o test_cancel_getaddrinfo
-test_cancel_getaddrinfo_2:
-	$(CC) $(CFLAGS) test_cancel_getaddrinfo_2.c $(LFLAGS) -o test_cancel_getaddrinfo_2
-test_cancel_connect:
-	$(CC) $(CFLAGS) test_cancel_connect.c $(LFLAGS) -o test_cancel_connect
-test_cancel_connect_2:
-	$(CC) $(CFLAGS) test_cancel_connect_2.c $(LFLAGS) -o test_cancel_connect_2
-test_cancel_read:
-	$(CC) $(CFLAGS) test_cancel_read.c $(LFLAGS) -o test_cancel_read
-test_cancel_accept:
-	$(CC) $(CFLAGS) test_cancel_accept.c $(LFLAGS) -o test_cancel_accept
-test_tls_connect:
-	$(CC) $(CFLAGS) test_tls_connect.c $(LFLAGS) -o test_tls_connect
-echo:
-	$(CC) $(CFLAGS) echo.c $(LFLAGS) -o echo
-benchmark:
-	$(CC) $(CFLAGS) benchmark.c $(LFLAGS) -o benchmark
-validate:
-	@if [ ! -f ../src/libmachinarium.a ]; then \
-		echo ""; \
-		echo "Please build the static library first."; \
-		echo ""; \
-		exit 1; \
-	fi
-clean:
-	$(RM) -f $(TESTS)
diff --git a/tests/test_accept_timeout.c b/tests/test_accept_timeout.c
deleted file mode 100644
index 6cd9f888..00000000
--- a/tests/test_accept_timeout.c
+++ /dev/null
@@ -1,73 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <string.h>
-#include <assert.h>
-
-static void
-server(void *arg)
-{
-	printf("server: started\n");
-
-	machine_t machine = arg;
-	machine_io_t server = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(7778);
-
-	int rc;
-	rc = machine_bind(server, (struct sockaddr*)&sa);
-	if (rc < 0) {
-		printf("server: bind failed\n");
-		machine_close(server);
-		machine_stop(machine);
-		return;
-	}
-
-	printf("server: waiting for connections (127.0.0.1:7778)\n");
-	machine_io_t client;
-	rc = machine_accept(server, &client, 16, 500);
-	if (rc < 0) {
-		printf("accept error: %s\n", machine_error(server));
-		machine_close(server);
-		machine_free_io(server);
-		machine_stop(machine);
-		return;
-	}
-	char msg[] = "hello world";
-	rc = machine_write(client, msg, sizeof(msg), INT_MAX);
-	if (rc < 0) {
-		printf("server: write error: %s\n", machine_error(client));
-		machine_close(server);
-		machine_free_io(server);
-		machine_stop(machine);
-		return;
-	}
-
-	machine_close(client);
-	machine_free_io(client);
-	machine_close(server);
-	machine_free_io(server);
-
-	printf("server: done\n");
-
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, server, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_cancel_accept.c b/tests/test_cancel_accept.c
deleted file mode 100644
index 89815d47..00000000
--- a/tests/test_cancel_accept.c
+++ /dev/null
@@ -1,79 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	machine_io_t server = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(7778);
-
-	int rc;
-	rc = machine_bind(server, (struct sockaddr*)&sa);
-	if (rc < 0) {
-		printf("server: bind failed: %s\n", machine_error(server));
-		machine_close(server);
-		machine_stop(machine);
-		return;
-	}
-
-	machine_io_t client;
-	rc = machine_accept(server, &client, 16, INT_MAX);
-	if (rc < 0) {
-		printf("accept error: %s\n", machine_error(server));
-		machine_close(server);
-		machine_free_io(server);
-		machine_stop(machine);
-		return;
-	}
-
-	machine_close(client);
-	machine_free_io(client);
-
-	machine_close(server);
-	machine_free_io(server);
-
-	if (machine_cancelled(machine))
-		printf("child marked as cancel\n");
-	printf("child end\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int id = machine_create_fiber(machine, test_connect, machine);
-	machine_sleep(machine, 0);
-	machine_cancel(machine, id);
-	machine_wait(machine, id);
-
-	printf("waiter 1 ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_cancel_connect.c b/tests/test_cancel_connect.c
deleted file mode 100644
index ae82572f..00000000
--- a/tests/test_cancel_connect.c
+++ /dev/null
@@ -1,62 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("8.8.8.8");
-	sa.sin_port = htons(1234);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr *)&sa, INT_MAX);
-	printf("child resumed\n");
-	assert(rc < 0);
-
-	machine_close(client);
-	machine_free_io(client);
-
-	if (machine_cancelled(machine))
-		printf("child marked as cancel\n");
-	printf("child end\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int id = machine_create_fiber(machine, test_connect, machine);
-	machine_sleep(machine, 0);
-	machine_cancel(machine, id);
-	machine_wait(machine, id);
-
-	printf("waiter 1 ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_cancel_connect_2.c b/tests/test_cancel_connect_2.c
deleted file mode 100644
index c70b9b91..00000000
--- a/tests/test_cancel_connect_2.c
+++ /dev/null
@@ -1,62 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <uv.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	assert(machine_cancelled(machine));
-	printf("child started\n");
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("8.8.8.8");
-	sa.sin_port = htons(1234);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr*)&sa, INT_MAX);
-	printf("child resumed\n");
-	assert(rc < 0);
-	machine_close(client);
-	machine_free_io(client);
-	if (machine_cancelled(machine))
-		printf("child marked as cancel\n");
-	printf("child end\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int id = machine_create_fiber(machine, test_connect, machine);
-	machine_cancel(machine, id); /* run cancelled */
-	machine_sleep(machine, 0);
-	machine_wait(machine, id);
-
-	printf("waiter 1 ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_cancel_getaddrinfo.c b/tests/test_cancel_getaddrinfo.c
deleted file mode 100644
index b52cb5ef..00000000
--- a/tests/test_cancel_getaddrinfo.c
+++ /dev/null
@@ -1,53 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-test_gai(void *arg)
-{
-	printf("child started\n");
-	machine_t machine = arg;
-	machine_io_t io = machine_create_io(machine);
-	struct addrinfo *res = NULL;
-	int rc = machine_getaddrinfo(io, "abracadabra", "http", NULL, &res, INT_MAX);
-	assert(rc < 0);
-	machine_close(io);
-	assert(res == NULL);
-	if (machine_cancelled(machine))
-		printf("child marked as cancel\n");
-	printf("child done\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int64_t fiber;
-	fiber = machine_create_fiber(machine, test_gai, machine);
-	machine_sleep(machine, 0);
-	machine_cancel(machine, fiber);
-	machine_wait(machine, fiber);
-
-	printf("waiter ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_cancel_getaddrinfo_2.c b/tests/test_cancel_getaddrinfo_2.c
deleted file mode 100644
index 025dbb3e..00000000
--- a/tests/test_cancel_getaddrinfo_2.c
+++ /dev/null
@@ -1,52 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-test_gai(void *arg)
-{
-	machine_t machine = arg;
-	assert(machine_cancelled(machine));
-	printf("child started\n");
-	machine_io_t io = machine_create_io(machine);
-	struct addrinfo *res = NULL;
-	int rc = machine_getaddrinfo(io, "abracadabra", "http", NULL, &res, INT_MAX);
-	assert(rc < 0);
-	machine_close(io);
-	assert(res == NULL);
-	printf("child done\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int64_t fiber;
-	fiber = machine_create_fiber(machine, test_gai, machine);
-	machine_cancel(machine, fiber); /* run cancelled */
-	machine_sleep(machine, 0);
-	machine_wait(machine, fiber);
-
-	printf("waiter ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_cancel_read.c b/tests/test_cancel_read.c
deleted file mode 100644
index bd03bafa..00000000
--- a/tests/test_cancel_read.c
+++ /dev/null
@@ -1,118 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <uv.h>
-#include <string.h>
-#include <assert.h>
-
-static void
-server(void *arg)
-{
-	printf("server: started\n");
-
-	machine_t machine = arg;
-	machine_io_t server = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	uv_ip4_addr("127.0.0.1", 7778, &sa);
-
-	int rc;
-	rc = machine_bind(server, (struct sockaddr*)&sa);
-	if (rc < 0) {
-		printf("server: bind failed\n");
-		machine_close(server);
-		return;
-	}
-
-	printf("server: waiting for connections (127.0.0.1:7778)\n");
-	machine_io_t client;
-	rc = machine_accept(server, &client, 16, INT_MAX);
-	if (rc < 0) {
-		printf("accept error.\n");
-		machine_close(server);
-		return;
-	}
-
-	machine_sleep(machine, 100 * 1000);
-
-	machine_close(client);
-	machine_close(server);
-	printf("server: done\n");
-}
-
-static void
-client(void *arg)
-{
-	printf("client: started\n");
-
-	machine_t machine = arg;
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	uv_ip4_addr("127.0.0.1", 7778, &sa);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr*)&sa, INT_MAX);
-	if (rc < 0) {
-		printf("client: connect failed\n");
-		machine_close(client);
-		return;
-	}
-
-	printf("client: connected\n");
-
-	/* will wait forever */
-	rc = machine_read(client, NULL, 12, INT_MAX);
-	if (rc < 0) {
-		if (machine_cancelled(machine)) {
-			printf("client: read cancelled\n");
-		} else {
-			printf("client: read failed\n");
-		}
-		machine_close(client);
-		return;
-	}
-
-	machine_close(client);
-
-	printf("client: done\n");
-}
-
-static void
-runner(void *arg)
-{
-	machine_t machine = arg;
-
-	int server_id = machine_create_fiber(machine, server, machine);
-	int client_id = machine_create_fiber(machine, client, machine);
-
-	/* switch to server, client */
-	machine_sleep(machine, 0);
-
-	/* switch to client read */
-	machine_sleep(machine, 0);
-
-	/* cancel client read */
-	machine_cancel(machine, client_id);
-
-	machine_sleep(machine, 0);
-	machine_cancel(machine, server_id);
-	machine_sleep(machine, 0);
-
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, runner, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_cancel_sleep.c b/tests/test_cancel_sleep.c
deleted file mode 100644
index 9f48f8b7..00000000
--- a/tests/test_cancel_sleep.c
+++ /dev/null
@@ -1,49 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-test_child(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	printf("child sleep for 600 seconds\n");
-	machine_sleep(machine, 600 * 1000);
-	printf("child wakeup\n");
-	if (machine_cancelled(machine))
-		printf("child cancelled\n");
-	printf("child 0 ended\n");
-}
-
-static void
-test_parent(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("parent started\n");
-
-	int64_t id;
-	id = machine_create_fiber(machine, test_child, machine);
-	machine_sleep(machine, 0);
-	machine_cancel(machine, id);
-	machine_wait(machine, id);
-
-	printf("parent ended\n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_parent, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_cancel_sleep_2.c b/tests/test_cancel_sleep_2.c
deleted file mode 100644
index df8fc7fa..00000000
--- a/tests/test_cancel_sleep_2.c
+++ /dev/null
@@ -1,50 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-test_child(void *arg)
-{
-	machine_t machine = arg;
-	assert(machine_cancelled(machine));
-	printf("child started\n");
-	printf("child sleep for 600 seconds\n");
-	machine_sleep(machine, 600 * 1000);
-	printf("child wakeup\n");
-	if (machine_cancelled(machine))
-		printf("child cancelled\n");
-	printf("child 0 ended\n");
-}
-
-static void
-test_parent(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("parent started\n");
-
-	int64_t fiber;
-	fiber = machine_create_fiber(machine, test_child, machine);
-	machine_cancel(machine, fiber); /* run cancelled fiber */
-	machine_sleep(machine, 0);
-	machine_wait(machine, fiber);
-
-	printf("parent ended\n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_parent, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_client_server.c b/tests/test_client_server.c
deleted file mode 100644
index 8c3600e5..00000000
--- a/tests/test_client_server.c
+++ /dev/null
@@ -1,115 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <string.h>
-#include <assert.h>
-
-static void
-server(void *arg)
-{
-	printf("server: started\n");
-
-	machine_t machine = arg;
-	machine_io_t server = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(7778);
-
-	int rc;
-	rc = machine_bind(server, (struct sockaddr*)&sa);
-	if (rc < 0) {
-		printf("server: bind failed\n");
-		machine_close(server);
-		return;
-	}
-
-	printf("server: waiting for connections (127.0.0.1:7778)\n");
-	machine_io_t client;
-	rc = machine_accept(server, &client, 16, INT_MAX);
-	if (rc < 0) {
-		printf("accept error: %s\n", machine_error(server));
-		machine_close(server);
-		machine_free_io(server);
-		return;
-	}
-	char msg[] = "hello world";
-	rc = machine_write(client, msg, sizeof(msg), INT_MAX);
-	if (rc < 0) {
-		printf("server: write error: %s\n", machine_error(client));
-		machine_close(server);
-		machine_free_io(server);
-		return;
-	}
-
-	machine_close(client);
-	machine_free_io(client);
-	machine_close(server);
-	machine_free_io(server);
-
-	printf("server: done\n");
-}
-
-static void
-client(void *arg)
-{
-	printf("client: started\n");
-
-	machine_t machine = arg;
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(7778);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr*)&sa, INT_MAX);
-	if (rc < 0) {
-		printf("client: connect failed: %s\n", machine_error(client));
-		machine_close(client);
-		machine_free_io(client);
-		return;
-	}
-
-	printf("client: connected\n");
-
-	char buf[16];
-	rc = machine_read(client, buf, 12, INT_MAX);
-	if (rc < 0) {
-		printf("client: read failed: %s\n", machine_error(client));
-		machine_close(client);
-		machine_free_io(client);
-		return;
-	}
-
-	assert(memcmp(buf, "hello world", 12) == 0);
-
-	rc = machine_read(client, buf, 1, INT_MAX);
-	/* eof */
-	assert(rc == -1);
-
-	machine_close(client);
-	machine_free_io(client);
-
-	printf("client: done\n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, server, machine);
-	machine_create_fiber(machine, client, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_client_server_ra.c b/tests/test_client_server_ra.c
deleted file mode 100644
index 2ea046e4..00000000
--- a/tests/test_client_server_ra.c
+++ /dev/null
@@ -1,147 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <string.h>
-#include <assert.h>
-
-static void
-server(void *arg)
-{
-	printf("server: started\n");
-
-	machine_t machine = arg;
-	machine_io_t server = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(7778);
-
-	int rc;
-	rc = machine_bind(server, (struct sockaddr*)&sa);
-	if (rc < 0) {
-		printf("server: bind failed: %s\n", machine_error(server));
-		machine_close(server);
-		machine_free_io(server);
-		return;
-	}
-
-	printf("server: waiting for connections (127.0.0.1:7778)\n");
-	machine_io_t client;
-	rc = machine_accept(server, &client, 16, INT_MAX);
-	if (rc < 0) {
-		printf("accept error: %s\n", machine_error(server));
-		machine_close(server);
-		machine_free_io(server);
-		return;
-	}
-	char msg[] = "hello world" "HELLO WORLD" "a" "b" "c" "333";
-	rc = machine_write(client, msg, sizeof(msg), INT_MAX);
-	if (rc < 0) {
-		printf("server: write error: %s\n", machine_error(client));
-		machine_close(client);
-		machine_free_io(client);
-		machine_close(server);
-		machine_free_io(server);
-		return;
-	}
-
-	machine_close(client);
-	machine_free_io(client);
-	machine_close(server);
-	machine_free_io(server);
-	printf("server: done\n");
-}
-
-static void
-client(void *arg)
-{
-	printf("client: started\n");
-
-	machine_t machine = arg;
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(7778);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr*)&sa, INT_MAX);
-	if (rc < 0) {
-		printf("client: connect failed\n");
-		machine_close(client);
-		machine_free_io(client);
-		return;
-	}
-
-	printf("client: connected\n");
-
-	rc = machine_set_readahead(client, 1024);
-	if (rc < 0) {
-		printf("client: %s\n", machine_error(client));
-		machine_close(client);
-		machine_free_io(client);
-		return;
-	}
-
-	/* read and fill readahead buffer */
-	char buf[16];
-	rc = machine_read(client, buf, 11, INT_MAX);
-	if (rc < 0) {
-		printf("client: read failed\n");
-		machine_close(client);
-		machine_free_io(client);
-		return;
-	}
-
-	assert(memcmp(buf, "hello world", 11) == 0);
-
-	/* read from buffer */
-	rc = machine_read(client, buf, 11, INT_MAX);
-	assert(rc == 0);
-	assert(memcmp(buf, "HELLO WORLD", 11) == 0);
-
-	rc = machine_read(client, buf, 1, INT_MAX);
-	assert(rc == 0);
-	assert(*buf == 'a');
-
-	rc = machine_read(client, buf, 1, INT_MAX);
-	assert(rc == 0);
-	assert(*buf == 'b');
-
-	rc = machine_read(client, buf, 1, INT_MAX);
-	assert(rc == 0);
-	assert(*buf == 'c');
-
-	rc = machine_read(client, buf, 4, INT_MAX);
-	assert(rc == 0);
-	assert(memcmp(buf, "333", 4) == 0);
-
-	/* eof */
-	rc = machine_read(client, buf, 1, INT_MAX);
-	assert(rc == -1);
-
-	machine_close(client);
-	machine_free_io(client);
-
-	printf("client: done\n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, server, machine);
-	machine_create_fiber(machine, client, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_condition.c b/tests/test_condition.c
deleted file mode 100644
index cc14fb65..00000000
--- a/tests/test_condition.c
+++ /dev/null
@@ -1,47 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-test_condition(void *arg)
-{
-	machine_t machine = arg;
-	printf("condition fiber started\n");
-	int rc = machine_condition(machine, 1000);
-	assert(rc == 0);
-	printf("condition fiber ended\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int64_t a;
-	a = machine_create_fiber(machine, test_condition, machine);
-
-	machine_sleep(machine, 0);
-	machine_signal(machine, a);
-	machine_sleep(machine, 0);
-
-	printf("waiter ended\n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_condition_2.c b/tests/test_condition_2.c
deleted file mode 100644
index f43fb6b3..00000000
--- a/tests/test_condition_2.c
+++ /dev/null
@@ -1,48 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-test_condition(void *arg)
-{
-	machine_t machine = arg;
-	printf("condition fiber started\n");
-	int rc = machine_condition(machine, 1);
-	assert(rc < 0);
-	printf("condition fiber ended\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int64_t a;
-	a = machine_create_fiber(machine, test_condition, machine);
-	machine_sleep(machine, 100);
-
-	int rc;
-	rc = machine_signal(machine, a);
-	assert(rc < 0);
-
-	printf("waiter ended\n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_connect.c b/tests/test_connect.c
deleted file mode 100644
index 15781c33..00000000
--- a/tests/test_connect.c
+++ /dev/null
@@ -1,61 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("213.180.204.3");
-	sa.sin_port = htons(80);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr *)&sa, INT_MAX);
-	if (rc == -1)
-		printf("connection failed: %s\n", machine_error(client));
-	else
-		printf("connected\n");
-
-	machine_close(client);
-	machine_free_io(client);
-
-	printf("child end\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int id = machine_create_fiber(machine, test_connect, machine);
-	machine_sleep(machine, 0);
-	machine_wait(machine, id);
-
-	printf("waiter 1 ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_connect_timeout.c b/tests/test_connect_timeout.c
deleted file mode 100644
index fe33092a..00000000
--- a/tests/test_connect_timeout.c
+++ /dev/null
@@ -1,61 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("8.8.8.8");
-	sa.sin_port = htons(80);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr *)&sa, 100);
-	if (rc == -1)
-		printf("connection failed: %s\n", machine_error(client));
-	else
-		printf("connected\n");
-
-	machine_close(client);
-	machine_free_io(client);
-
-	printf("child end\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int id = machine_create_fiber(machine, test_connect, machine);
-	machine_sleep(machine, 0);
-	machine_wait(machine, id);
-
-	printf("waiter 1 ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_create.c b/tests/test_create.c
deleted file mode 100644
index a08482c6..00000000
--- a/tests/test_create.c
+++ /dev/null
@@ -1,30 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-int fiber_call = 0;
-
-static void
-fiber(void *arg)
-{
-	machine_t machine = arg;
-	fiber_call++;
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, fiber, machine);
-	machine_start(machine);
-	assert(fiber_call == 1);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_getaddrinfo.c b/tests/test_getaddrinfo.c
deleted file mode 100644
index f10766a0..00000000
--- a/tests/test_getaddrinfo.c
+++ /dev/null
@@ -1,37 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-fiber(void *arg)
-{
-	machine_t machine = arg;
-	machine_io_t io = machine_create_io(machine);
-	struct addrinfo *res = NULL;
-	int rc = machine_getaddrinfo(io, "localhost", "http", NULL, &res, INT_MAX);
-	if (rc < 0) {
-		printf("failed to resolve address\n");
-	} else {
-		assert(res != NULL);
-	}
-	if (res)
-		freeaddrinfo(res);
-	machine_close(io);
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, fiber, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_getaddrinfo_2.c b/tests/test_getaddrinfo_2.c
deleted file mode 100644
index 3642277f..00000000
--- a/tests/test_getaddrinfo_2.c
+++ /dev/null
@@ -1,32 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-fiber(void *arg)
-{
-	machine_t machine = arg;
-	machine_io_t io = machine_create_io(machine);
-	struct addrinfo *res = NULL;
-	int rc = machine_getaddrinfo(io, "abracadabra", "http", NULL, &res, INT_MAX);
-	assert(rc < 0);
-	assert(res == NULL);
-	machine_close(io);
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, fiber, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_getaddrinfo_3.c b/tests/test_getaddrinfo_3.c
deleted file mode 100644
index 80c09808..00000000
--- a/tests/test_getaddrinfo_3.c
+++ /dev/null
@@ -1,55 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-fiber_1(void *arg)
-{
-	machine_t machine = arg;
-	machine_io_t io = machine_create_io(machine);
-	struct addrinfo *res = NULL;
-	int rc = machine_getaddrinfo(io, "localhost", "http", NULL, &res, INT_MAX);
-	if (rc < 0) {
-		printf("failed to resolve address\n");
-	} else {
-		assert(res != NULL);
-	}
-	if (res)
-		freeaddrinfo(res);
-	machine_close(io);
-}
-
-static void
-fiber_2(void *arg)
-{
-	machine_t machine = arg;
-	machine_io_t io = machine_create_io(machine);
-	struct addrinfo *res = NULL;
-	int rc = machine_getaddrinfo(io, "localhost", "http", NULL, &res, INT_MAX);
-	if (rc < 0) {
-		printf("failed to resolve address\n");
-	} else {
-		assert(res != NULL);
-	}
-	if (res)
-		freeaddrinfo(res);
-	machine_close(io);
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, fiber_1, machine);
-	machine_create_fiber(machine, fiber_2, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_io_new.c b/tests/test_io_new.c
deleted file mode 100644
index 9abc51a6..00000000
--- a/tests/test_io_new.c
+++ /dev/null
@@ -1,20 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_io_t io = machine_create_io(machine);
-
-	machine_close(io);
-	machine_free_io(io);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_new.c b/tests/test_new.c
deleted file mode 100644
index 0a7e993c..00000000
--- a/tests/test_new.c
+++ /dev/null
@@ -1,16 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_read.c b/tests/test_read.c
deleted file mode 100644
index 93942fe9..00000000
--- a/tests/test_read.c
+++ /dev/null
@@ -1,72 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(33413);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr *)&sa, INT_MAX);
-	if (rc == -1)
-		printf("connection failed: %s\n", machine_error(client));
-	else
-		printf("connected\n");
-
-	rc = machine_write(client, "hello world", 11, INT_MAX);
-	if (rc == -1)
-		printf("write failed: %s\n", machine_error(client));
-
-	char buf[10];
-	rc = machine_read(client, buf, 10, INT_MAX);
-	if (rc == -1)
-		printf("read failed: %s\n", machine_error(client));
-	
-	printf("%.*s\n", 10, buf);
-
-	machine_close(client);
-	machine_free_io(client);
-
-	printf("child end\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int id = machine_create_fiber(machine, test_connect, machine);
-	machine_sleep(machine, 0);
-	machine_wait(machine, id);
-
-	printf("waiter 1 ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_read_timeout.c b/tests/test_read_timeout.c
deleted file mode 100644
index 76950d55..00000000
--- a/tests/test_read_timeout.c
+++ /dev/null
@@ -1,72 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(33413);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr *)&sa, INT_MAX);
-	if (rc == -1)
-		printf("connection failed: %s\n", machine_error(client));
-	else
-		printf("connected\n");
-
-	rc = machine_write(client, "hello world", 11, INT_MAX);
-	if (rc == -1)
-		printf("write failed: %s\n", machine_error(client));
-
-	char buf[10];
-	rc = machine_read(client, buf, 10, 1000);
-	if (rc == -1)
-		printf("read failed: %s\n", machine_error(client));
-	
-	printf("%.*s\n", 10, buf);
-
-	machine_close(client);
-	machine_free_io(client);
-
-	printf("child end\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int id = machine_create_fiber(machine, test_connect, machine);
-	machine_sleep(machine, 0);
-	machine_wait(machine, id);
-
-	printf("waiter 1 ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_sleep.c b/tests/test_sleep.c
deleted file mode 100644
index f0b29244..00000000
--- a/tests/test_sleep.c
+++ /dev/null
@@ -1,31 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-test_child(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	printf("sleep 10 ms\n");
-	machine_sleep(machine, 1000);
-	printf("sleep wakeup\n");
-	printf("child ended\n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_child, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_tls_connect.c b/tests/test_tls_connect.c
deleted file mode 100644
index cca3cec8..00000000
--- a/tests/test_tls_connect.c
+++ /dev/null
@@ -1,53 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <uv.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("fiber started\n");
-
-	machine_io_t client = machine_create_io(machine);
-	machine_tls_t tls = machine_create_tls(machine);
-	machine_set_tls(client, tls);
-
-	struct sockaddr_in sa;
-	uv_ip4_addr("127.0.0.1", 44330, &sa);
-	int rc;
-	rc = machine_connect(client, (struct sockaddr*)&sa, 0);
-	if (rc == -1) {
-		char *error;
-		error = machine_error(client);
-		printf("connect error: %s\n", error);
-	} else {
-		printf("connected: %d\n", rc);
-	}
-
-	rc = machine_write(client, "hello", 5, 0);
-	if (rc == -1) {
-		char *error;
-		error = machine_error(client);
-		printf("write error: %s\n", error);
-	}
-
-	machine_close(client);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_connect, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_wait.c b/tests/test_wait.c
deleted file mode 100644
index 799b01d4..00000000
--- a/tests/test_wait.c
+++ /dev/null
@@ -1,58 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-
-static void
-test_child_0(void *arg)
-{
-	machine_t machine = arg;
-	printf("child 0 started\n");
-	machine_sleep(machine, 1000);
-	printf("child 0 ended\n");
-}
-
-static void
-test_child_1(void *arg)
-{
-	machine_t machine = arg;
-	printf("child 1 started\n");
-	machine_sleep(machine, 500);
-	printf("child 1 ended\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int64_t a, b;
-	a = machine_create_fiber(machine, test_child_0, machine);
-	b = machine_create_fiber(machine, test_child_1, machine);
-
-	machine_wait(machine, b);
-	printf("waiter 1 ended \n");
-
-	machine_wait(machine, a);
-	printf("waiter 0 ended \n");
-
-	printf("waiter ended\n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/test_write.c b/tests/test_write.c
deleted file mode 100644
index 5c0a4831..00000000
--- a/tests/test_write.c
+++ /dev/null
@@ -1,65 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <machinarium_private.h>
-#include <assert.h>
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("child started\n");
-	machine_io_t client = machine_create_io(machine);
-
-	struct sockaddr_in sa;
-	sa.sin_family = AF_INET;
-	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
-	sa.sin_port = htons(33413);
-
-	int rc;
-	rc = machine_connect(client, (struct sockaddr *)&sa, INT_MAX);
-	if (rc == -1)
-		printf("connection failed: %s\n", machine_error(client));
-	else
-		printf("connected\n");
-
-	rc = machine_write(client, "hello world", 11, INT_MAX);
-	if (rc == -1)
-		printf("write failed: %s\n", machine_error(client));
-
-	machine_close(client);
-	machine_free_io(client);
-
-	printf("child end\n");
-}
-
-static void
-test_waiter(void *arg)
-{
-	machine_t machine = arg;
-
-	printf("waiter started\n");
-
-	int id = machine_create_fiber(machine, test_connect, machine);
-	machine_sleep(machine, 0);
-	machine_wait(machine, id);
-
-	printf("waiter 1 ended \n");
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_waiter, machine);
-	machine_start(machine);
-	printf("shutting down\n");
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/tls_client.c b/tests/tls_client.c
deleted file mode 100644
index 8824d302..00000000
--- a/tests/tls_client.c
+++ /dev/null
@@ -1,147 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-
-static char *verify    = NULL;
-static char *server    = NULL;
-static char *ca_path   = NULL;
-static char *ca_file   = NULL;
-static char *cert_file = NULL;
-static char *key_file  = NULL;
-static char *addr      = "127.0.0.1";
-static char *port      = "44330";
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("fiber started\n");
-
-	/* resolve */
-	struct addrinfo *ai = NULL;
-	machine_io_t resolver;
-	resolver = machine_create_io(machine);
-	int rc;
-	rc = machine_getaddrinfo(resolver, addr, port, NULL, &ai, 0);
-	if (rc == -1) {
-		char *error;
-		error = machine_error(resolver);
-		printf("machine_getaddrinfo(): %s\n", error);
-		machine_close(resolver);
-		machine_stop(machine);
-		return;
-	}
-	machine_close(resolver);
-
-	/* tls context */
-	machine_tls_t tls;
-	tls = machine_create_tls(machine);
-	if (verify)
-		machine_tls_set_verify(tls, verify);
-	if (server)
-		machine_tls_set_server(tls, server);
-	if (ca_path)
-		machine_tls_set_ca_path(tls, ca_path);
-	if (ca_file)
-		machine_tls_set_ca_file(tls, ca_file);
-	if (cert_file)
-		machine_tls_set_cert_file(tls, cert_file);
-	if (key_file)
-		machine_tls_set_key_file(tls, key_file);
-
-	/* client */
-	machine_io_t client;
-	client = machine_create_io(machine);
-	machine_set_tls(client, tls);
-
-	/* connect */
-	rc = machine_connect(client, ai->ai_addr, 0);
-	freeaddrinfo(ai);
-	if (rc == -1) {
-		char *error;
-		error = machine_error(client);
-		printf("machine_connect(): %s\n", error);
-		machine_close(client);
-		machine_stop(machine);
-		return;
-	}
-	printf("connected to %s:%s\n", addr, port);
-
-	for (;;) {
-		char buf[256];
-		int  len;
-		char *p = fgets(buf, sizeof(buf), stdin);
-		if (! p)
-			break;
-		len = strlen(buf);
-		rc = machine_write(client, buf, len, 0);
-		if (rc == -1) {
-			char *error;
-			error = machine_error(client);
-			printf("machine_write(): %s\n", error);
-		}
-	}
-
-	machine_close(client);
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	int opt;
-	while ((opt = getopt(argc, argv, "hv:k:c:r:R:s:a:p:")) != -1) {
-		switch (opt) {
-		case 'h':
-			printf("usage: [-v verify_mode]\n"
-			       "       [-k key_file]\n"
-			       "       [-c cert_file]\n"
-			       "       [-r ca_file ]\n"
-			       "       [-R ca_path]\n"
-			       "       [-s server_name]\n"
-			       "       [-a address]\n"
-			       "       [-p port]\n");
-			return 0;
-		case 'v':
-			verify = optarg;
-			break;
-		case 'k':
-			key_file = optarg;
-			break;
-		case 'c':
-			cert_file = optarg;
-			break;
-		case 'r':
-			ca_file = optarg;
-			break;
-		case 'R':
-			ca_path = optarg;
-			break;
-		case 's':
-			server = optarg;
-			break;
-		case 'a':
-			addr = optarg;
-			break;
-		case 'p':
-			port = optarg;
-			break;
-		}
-	}
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_connect, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}
diff --git a/tests/tls_server.c b/tests/tls_server.c
deleted file mode 100644
index 0edaa1c2..00000000
--- a/tests/tls_server.c
+++ /dev/null
@@ -1,177 +0,0 @@
-
-/*
- * machinarium.
- *
- * Cooperative multitasking engine.
-*/
-
-#include <machinarium.h>
-#include <assert.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-
-static char *verify    = NULL;
-static char *server    = NULL;
-static char *ca_path   = NULL;
-static char *ca_file   = NULL;
-static char *cert_file = NULL;
-static char *key_file  = NULL;
-static char *addr      = "127.0.0.1";
-static char *port      = "44330";
-
-static void
-test_client(void *arg)
-{
-	machine_io_t client = arg;
-	int fd = machine_fd(client);
-	printf("new connection: %d \n", fd);
-	for (;;) {
-		int rc;
-		char buf[10];
-		/* read 10 bytes (with 5 sec timeout) */
-		rc = machine_read(client, buf, 10, 0);
-		if (rc < 0) {
-			if (machine_read_timedout(client)) {
-				printf("timeout in %d\n", fd);
-				continue;
-			}
-			if (! machine_connected(client)) {
-				printf("client disconnected\n");
-				break;
-			}
-			printf("client read error\n");
-			char *error;
-			error = machine_error(client);
-			printf("machine_read(): %s\n", error);
-			break;
-		}
-		/* write 10 bytes */
-		rc = machine_write(client, buf, 10, 0);
-		if (rc < 0)
-			printf("client write error\n");
-	}
-	machine_close(client);
-}
-
-static void
-test_connect(void *arg)
-{
-	machine_t machine = arg;
-	printf("fiber started\n");
-
-	/* resolve */
-	struct addrinfo *ai = NULL;
-	machine_io_t resolver;
-	resolver = machine_create_io(machine);
-	int rc;
-	rc = machine_getaddrinfo(resolver, addr, port, NULL, &ai, 0);
-	if (rc == -1) {
-		char *error;
-		error = machine_error(resolver);
-		printf("machine_getaddrinfo(): %s\n", error);
-		machine_close(resolver);
-		machine_stop(machine);
-		return;
-	}
-	machine_close(resolver);
-
-	/* tls context */
-	machine_tls_t tls;
-	tls = machine_create_tls(machine);
-	if (verify)
-		machine_tls_set_verify(tls, verify);
-	if (server)
-		machine_tls_set_server(tls, server);
-	if (ca_path)
-		machine_tls_set_ca_path(tls, ca_path);
-	if (ca_file)
-		machine_tls_set_ca_file(tls, ca_file);
-	if (cert_file)
-		machine_tls_set_cert_file(tls, cert_file);
-	if (key_file)
-		machine_tls_set_key_file(tls, key_file);
-
-	/* server */
-	machine_io_t server;
-	server = machine_create_io(machine);
-
-	/* bind */
-	rc = machine_bind(server, ai->ai_addr);
-	if (rc < 0) {
-		char *error;
-		error = machine_error(server);
-		printf("machine_bind(): %s\n", error);
-		machine_close(server);
-		machine_stop(machine);
-		return;
-	}
-	machine_set_tls(server, tls);
-
-	printf("waiting for connections (%s:%s)\n", addr, port);
-	for (;;) {
-		machine_io_t client;
-		rc = machine_accept(server, 16, &client);
-		if (rc < 0) {
-			char *error;
-			error = machine_error(server);
-			printf("machine_accept(): %s\n", error);
-		} else
-		if (rc == 0) {
-			machine_create_fiber(machine, test_client, client);
-		}
-	}
-	machine_close(server);
-	machine_stop(machine);
-}
-
-int
-main(int argc, char *argv[])
-{
-	int opt;
-	while ((opt = getopt(argc, argv, "hv:k:c:r:R:s:a:p:")) != -1) {
-		switch (opt) {
-		case 'h':
-			printf("usage: [-v verify_mode]\n"
-			       "       [-k key_file]\n"
-			       "       [-c cert_file]\n"
-			       "       [-r ca_file ]\n"
-			       "       [-R ca_path]\n"
-			       "       [-s server_name]\n"
-			       "       [-a listen_address]\n"
-			       "       [-p port]\n");
-			return 0;
-		case 'v':
-			verify = optarg;
-			break;
-		case 'k':
-			key_file = optarg;
-			break;
-		case 'c':
-			cert_file = optarg;
-			break;
-		case 'r':
-			ca_file = optarg;
-			break;
-		case 'R':
-			ca_path = optarg;
-			break;
-		case 's':
-			server = optarg;
-			break;
-		case 'a':
-			addr = optarg;
-			break;
-		case 'p':
-			port = optarg;
-			break;
-		}
-	}
-	machine_t machine = machine_create();
-	machine_create_fiber(machine, test_connect, machine);
-	machine_start(machine);
-	machine_free(machine);
-	return 0;
-}