diff --git a/tests/unit/services/test_provider.py b/tests/unit/services/test_provider.py
index d1842ee3..0d113009 100644
--- a/tests/unit/services/test_provider.py
+++ b/tests/unit/services/test_provider.py
@@ -172,6 +172,9 @@ def test_install_snap(
 ):
     monkeypatch.delenv("SNAP", raising=False)
     monkeypatch.delenv("CRAFT_SNAP_CHANNEL", raising=False)
+    monkeypatch.delenv("SNAP_INSTANCE_NAME", raising=False)
+    monkeypatch.delenv("SNAP_NAME", raising=False)
+    monkeypatch.delenv("CRAFT_SNAP_CHANNEL", raising=False)
     for name, value in environment.items():
         monkeypatch.setenv(name, value)
     service = provider.ProviderService(