diff --git a/tests/test_electricity.py b/tests/test_electricity.py
index 066e1853..99db96cb 100644
--- a/tests/test_electricity.py
+++ b/tests/test_electricity.py
@@ -44,8 +44,8 @@ def get_db():
     return dummy_db, version
 
 
-# This won't work with PRs because PRs from outside contributors
-# don't have access to secrets (for good reason).
+# This won't work with PRs because PRs from outside contributors don't have
+# access to secrets (for good reason).
 if "IAM_FILES_KEY" in os.environ:
     key = os.environ["IAM_FILES_KEY"]
 else:
@@ -78,6 +78,12 @@ def get_db():
     )
 
 
+@pytest.mark.skipif(not key, reason="No access to decryption key")
+def test_losses():
+    assert len(el.network_loss) == 13
+    assert np.isclose(el.network_loss["CAZ"]["high"]["transf_loss"], 0.0223586, rtol=1e-2)
+
+
 @pytest.mark.skipif(not key, reason="No access to decryption key")
 def test_powerplant_map():
     s = el.powerplant_map["Biomass IGCC CCS"]