diff --git a/tests.py b/test_echo_server.py
similarity index 95%
rename from tests.py
rename to test_echo_server.py
index 04014c7..d0437cb 100644
--- a/tests.py
+++ b/test_echo_server.py
@@ -92,10 +92,6 @@ def test_stop():
         'You ever wonder why we are here?',
         'Lorem ipsum dolor sit amet',
         'You always have a plan, Dutch!',
-        token_urlsafe(32),
-        token_urlsafe(32),
-        token_urlsafe(32),
-        token_urlsafe(32)
     ]
 )
 def test_io(io_pipes, test_data):
@@ -103,6 +99,12 @@ def test_io(io_pipes, test_data):
     assert io_pipes.recv().decode() == test_data
 
 
+def test_io_random(io_pipes):
+    test_data = token_urlsafe(512)
+    for _ in range(100):
+        io_pipes.send_message(test_data.encode())
+        assert io_pipes.recv().decode() == test_data
+
 @pytest.mark.parametrize(
     'test_data_size', [
         1024,