diff --git a/insights/tests/datasources/test_ethernet.py b/insights/tests/datasources/test_ethernet.py
index eeccf210f1..1feb779f54 100644
--- a/insights/tests/datasources/test_ethernet.py
+++ b/insights/tests/datasources/test_ethernet.py
@@ -39,7 +39,9 @@
 team0     bf000427-d9f1-432f-819d-257edb86c6fb  team      --
 """
 
-NMCLI_C_SHOW_EMPTY = ""
+NMCLI_C_SHOW_EMPTY = """
+NAME      UUID                                  TYPE      DEVICE
+"""
 
 EXPECTED = ['enp1s0', 'enp8s0', 'enp1s0.2']