Provide running loop in tests where event_loop is needed

Author: cderici

tests/integration/test_unit.py

@@ -6,7 +6,7 @@
 from tempfile import NamedTemporaryFile
 import pytest
 
-from juju import utils
+from juju import utils, jasyncio
 
 from .. import base
 
@@ -160,7 +160,7 @@ def check_results(results, out):
 async def test_scp():
     # ensure that asyncio.subprocess will work;
     try:
-        asyncio.get_child_watcher().attach_loop()
+        asyncio.get_child_watcher().attach_loop(jasyncio.get_running_loop())
     except RuntimeError:
         pytest.skip('test_scp will always fail outside of MainThread')
     async with base.CleanModel() as model:
@@ -193,7 +193,7 @@ async def test_scp():
 async def test_ssh():
     # ensure that asyncio.subprocess will work;
     try:
-        asyncio.get_child_watcher().attach_loop()
+        asyncio.get_child_watcher().attach_loop(jasyncio.get_running_loop())
     except RuntimeError:
         pytest.skip('test_ssh will always fail outside of MainThread')
     async with base.CleanModel() as model: