diff --git a/tests/test_elx/test_tap.py b/tests/test_elx/test_tap.py
index 6123b29..cdfd363 100644
--- a/tests/test_elx/test_tap.py
+++ b/tests/test_elx/test_tap.py
@@ -22,6 +22,6 @@ async def test_tap_process(tap: Tap):
     """
     Test that the tap process can be run.
     """
-    async with tap.process() as process:
+    async with tap.process(limit=1) as process:
         # Make sure the tap process is of the right type.
         assert type(process) == asyncio.subprocess.Process