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diff --git a/modules/libjuju/tests/integration/test_application.py b/modules/libjuju/tests/integration/test_application.py
new file mode 100644
index 0000000..1a4fcaa
--- /dev/null
+++ b/modules/libjuju/tests/integration/test_application.py
@@ -0,0 +1,94 @@
+import pytest
+
+from .. import base
+
+MB = 1
+
+
+@base.bootstrapped
+@pytest.mark.asyncio
+async def test_action(event_loop):
+    async with base.CleanModel() as model:
+        ubuntu_app = await model.deploy(
+            'mysql',
+            application_name='mysql',
+            series='trusty',
+            channel='stable',
+            config={
+                'tuning-level': 'safest',
+            },
+            constraints={
+                'mem': 256 * MB,
+            },
+        )
+
+        # update and check app config
+        await ubuntu_app.set_config({'tuning-level': 'fast'})
+        config = await ubuntu_app.get_config()
+        assert config['tuning-level']['value'] == 'fast'
+
+        # update and check app constraints
+        await ubuntu_app.set_constraints({'mem': 512 * MB})
+        constraints = await ubuntu_app.get_constraints()
+        assert constraints['mem'] == 512 * MB
+
+
+@base.bootstrapped
+@pytest.mark.asyncio
+async def test_add_units(event_loop):
+    from juju.unit import Unit
+
+    async with base.CleanModel() as model:
+        app = await model.deploy(
+            'ubuntu-0',
+            application_name='ubuntu',
+            series='trusty',
+            channel='stable',
+        )
+        units = await app.add_units(count=2)
+
+        assert len(units) == 2
+        for unit in units:
+            assert isinstance(unit, Unit)
+
+
+@base.bootstrapped
+@pytest.mark.asyncio
+async def test_upgrade_charm(event_loop):
+    async with base.CleanModel() as model:
+        app = await model.deploy('ubuntu-0')
+        assert app.data['charm-url'] == 'cs:ubuntu-0'
+        await app.upgrade_charm()
+        assert app.data['charm-url'].startswith('cs:ubuntu-')
+        assert app.data['charm-url'] != 'cs:ubuntu-0'
+
+
+@base.bootstrapped
+@pytest.mark.asyncio
+async def test_upgrade_charm_channel(event_loop):
+    async with base.CleanModel() as model:
+        app = await model.deploy('ubuntu-0')
+        assert app.data['charm-url'] == 'cs:ubuntu-0'
+        await app.upgrade_charm(channel='stable')
+        assert app.data['charm-url'].startswith('cs:ubuntu-')
+        assert app.data['charm-url'] != 'cs:ubuntu-0'
+
+
+@base.bootstrapped
+@pytest.mark.asyncio
+async def test_upgrade_charm_revision(event_loop):
+    async with base.CleanModel() as model:
+        app = await model.deploy('ubuntu-0')
+        assert app.data['charm-url'] == 'cs:ubuntu-0'
+        await app.upgrade_charm(revision=8)
+        assert app.data['charm-url'] == 'cs:ubuntu-8'
+
+
+@base.bootstrapped
+@pytest.mark.asyncio
+async def test_upgrade_charm_switch(event_loop):
+    async with base.CleanModel() as model:
+        app = await model.deploy('ubuntu-0')
+        assert app.data['charm-url'] == 'cs:ubuntu-0'
+        await app.upgrade_charm(switch='ubuntu-8')
+        assert app.data['charm-url'] == 'cs:ubuntu-8'